Nematocarcinus proximatus Bate 1888

Nematocarcinus proximatus Bate, 1888

Nematocarcinus proximatus Bate, 1888:808, pl. 132: fig. 3 [type-locality: the Challenger series came from five rather widely separated Indo-Pacific stations: southern Indian Ocean between Prince Edward and Crozet islands; 46°46′S, 45°31′E, 2514 m; Aarafura Sea south of New Guinea; 9°59′S, 139°42′E, 51 m; southeast of Sagami Nada, Honshu, Japan; 34°37′N, 140°32′E, 3429 m; eastern Pacific off Islas Juan Fernandez, Chile; 33°42′S, 78°18′W, 2514 m; and eastern Pacific west of southern Chile; 42°43′S, 82°11′W, 2651 m].

DIAGNOSIS.—Rostrum overreaching antennal scale in adults, armed dorsally with continuous series of more than 30 teeth gradually becoming more widely spaced anteriorly, about 9 teeth of series placed on carapace posterior to orbit, ventral margin armed with 1 or 2 teeth considerably removed from apex; telson reaching about as far as distal end of lateral branch of uropod; carapace length 30 mm.

RANGE.—Known only from the type-series recorded from the southern Indian Ocean, south of Japan, the Arafura Sea, and the eastern Pacific west of Chile. The indication that the 15 specimens taken by the Challenger in the Arafura Sea were living at a depth of only 51 m, whereas all of the other specimens of the species taken by that vessel occurred in depths greater than 2500 m, suggests that the specimens from that station may belong to a different species and that the true N. proximatus may not be represented even in areas adjacent to the Philippine-Indonesian region.

*37. Nematocarcinus tenuirostris Bate, 1888

Nematocarcinus tenuirostris Bate, 1888:817, pl. 132: fig. 10 [type-locality: this species was recorded from two Challenger stations: southern Philippine Sea off Kepulauan Talaud; 4°33′N, 127°06′E, 914 meters; and Fiji Islands; 19°07′50″S, 178°19′35″E, 1116 m].

Neomatocarcinus tenuirostris var. sibogae De Man, 1917:279 [type-locality: off the south coast of Roti, Lesser Sunda Islands; 10°48′36″S, 123°23′06″E, 918 m].

Nematocarcinus tenuirostris var. Sibogae.—De Man, 1920:79, pl. 8: fig. 19–19d.

DIAGNOSIS.—Rostrum horizontal or slightly concave dorsally, overreaching antennular peduncle and even antennal scale in large specimens, armed dorsally with 3–5 teeth posterior to level of orbital margin and 3–6 teeth becoming more widely spaced anteriorly on rostrum proper, ventral margin typically armed with single tooth anterior to anteriormost tooth of dorsal series but some distance from apex, rarely unarmed ventrally; abdomen with posterior margin of 3rd somite not produced posteriorly in dorsal midline, pleuron of 5th somite armed with short posteroventral tooth. 6th somite usually bearing broad protuberance near posterior end of ventral midline; telson reaching fully as far as distal end of lateral branch of uropod; maximum carapace length more than 30 mm.

MATERIAL.—PHILIPPINES. Off western Lubang Islands: sta 5274; 13°57′30″N, 120°03′25″E; 960 m; gray mud, sand; 5.2°C; 16 Jul 1908 (0959–1029); 12′Agassiz beam trawl: 1 ovig [25.8]. Lagonoy Gulf, east of southern Luzon: sta 5469; 13°36′48″N, 123°38′24″E; [914 m]; green mud; 18Jun 1909; (1329–1411); 12′ Agassiz beam trawl: 1 [28.7]. North of Samar: sta 5445; 12°44′42″N, 124°59′50″E; 700 m; green mud, sand; 6.8°C; 3 Jun 1909 (1201–1238); 12′ Agassiz beam trawl: 2 [27.2, 28.9], 1 ovig [27.2]. Off Arangasa Islands, eastern Mindanao: sta 5236; 8°50′45″N, 126°26′52″E; 903 m; fine gray sand; 5.1 °C; 11 May 1908 (1027–1102); 12′ Agassiz beam trawl, 3 mud bags: 2 [26.2, 26.9]. Northern Palawan Passage: sta 5349; 10°54′N, 118°26′20″E; 1335 m; coral, sand; 4.8°C; 27 Dec 1908 (1340–1400); 12′ Tanner beam trawl, mud bag: 1 [20.2].

INDONESIA. Celebes Sea off Sabah (North Borneo): sta 5585; 4°07′00″N, 118°49′54″E; 871 m; gray mud; 5.1 °C; 28 Sep 1909 (0931–0951); 9′ Tanner beam trawl, mud bag: 1 ovig [28.1]. Teluk Tomini, Celebes: sta 5607; 0°04′00″S, 121°36′00″E; 1392 m; fine sand; 18 Nov 1909 (0920–0940); 12′ Agassiz beam trawl: 3 [19.1–23.2] 2 [18.8, 23.9]. Molucca Sea: sta 5601; 1°13′10″N, 125°17′05″E; 1399 m; sand, globigerina, pteropods; 13 Nov 1909 (1418–1439); 12′ Agassiz beam trawl, mud bag: 2 [25.8, 26.8] 1 [22.8]. West of Halmahera: sta 5618; 0°37′00″N, 127°15′00″E; 763 m; gray mud; 27 Nov 1909 (1444–1504); 12′ Agassiz beam trawl: 2 [22.3, 25.0], 1 ovig [25.0]; sta 5623; 0°16′30″N, 127°30′00″E; 497 m; fine sand, mud; 29 Nov 1909 (0922–0942); 12′ Agassiz beam trawl: 1 ovig [24.3]. Southern end of Sela Patinti, southern Halmahera: sta 5630; 0°56′30″S, 129°05′00″E; 1041 m; coral sand, mud; 2 Dec 1909 (0936–1000); 12′ Agassiz beam trawl: 1 [28.3] 1 [21.1]. Off southern Buru: sta 5638; 3°47′15″S, 126°23′40″E; 946 m; fine gray sand; 10 Dec 1909 (1400–1436); 12′ Agassiz beam trawl: 1 [22.4]. Teluk Bone, Celebes: sta 5650; 4°53′45″S, 121°29′00″E; 988 m; green mud; 4.5°C; 17 Dec 1909 (0922–0932); 12′ Agassiz beam trawl: 1 ovig [30.8]; sta 5651; 4°43′50″S, 121°23′24″E; 1280 m; green mud; 3.7°C; 17 Dec 1909 (1432–1452); 12′ Agassiz beam trawl: 1 [23.0] 1 [18.7]; sta 5652; 4°35′00″S, 121°23′06″E; 960 m; green mud; 5.1°C; 17 Dec 1909 (1639–1724); 12′ Agassiz beam trawl: 1 [22.1]; sta 5658; 3°32′40″S, 120°31′30″E; 933 m; gray mud; 5.1°C; 19 Dec 1909 (1423–1443); 12′ Agassiz beam trawl: 1 ovig [29.0].

RANGE.—Off southeastern India to Hawaii; 301–1611 m.