Crustaceans / by Mary J. Rathbun [and others].

Date:
[1910]
Catalogue details

Licence: In copyright

Credit: Crustaceans / by Mary J. Rathbun [and others]. Source: Wellcome Collection.

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    segment of the antennular peduncle. The outer maxillipeds reach a little beyond the middle of the antennal scale; the first pair of feet to the end of the antennal peduncle; the second pair midway between the maxilli- peds and the tip of the scale; the fifth pair to the end of the maxillipeds. The third segment of the abdomen seen in profile is evenly rounded; it is laterally slightly compressed; fourth segment without spines; the sixth is less than twice as long as the fifth, and also shorter than the seventh, which has 4 or 5 spines on either side. Smaller and more slender. Rostrum longer, sometimes ex- ceeding the scale a trifle, curving upward in terminal half, armed with 5 to 7 teeth above, 5 to 9 below. The pterygostomian spine may be obsolete. The thickened portion of the outer flagellum extends to the terminal fifth of the antennal scale. Dimensions. — 3 , approximate length 50 mm., length of carapace and rostrum 18.5 mm., of rostrum 10.2 mm. $ , approximate length 34 mm., of carapace and rostrum 16 mm., of rostrum 9.5 mm. Distribution.—From Arctic Alaska southward to Kamchatka and Aleutian Islands, and eastward to Port Etches. Taken by Dr. Dali in small numbers at Cape Lisbume, 5-7 fathoms; Cape Etolin, Nunivak, 8 fathoms; Hagemeister Strait, 8-15 fathoms; Chichagof Harbor, Attu, 5-7 fathoms; Kiska Harbor, 9-12 fathoms; Constantine Harbor, Amchitka, 6-10 fathoms; Bay of Islands, Adak, 9-16 fathoms; off station reef, Iliuliuk Harbor, Unalaska, 3 fathoms; Belkofski Bay, 15-25 fathoms; Anchorage, Big Koniuji Island, Shu- magins, 6-20 fathoms; Shahafka Cove, Kadiak; Chugachik Bay, Cook Inlet, 20-60 fathoms; Port Etches, 5-8 fathoms. Bristol Bay, 14^ fathoms {Albatross station 3236). Kadiak, 5 fathoms (Harriman Expedition, W. R. Coe). Bering Island (L. Stejneger). Bering Island, in stomach of Gadus macrocephalus (N. Grebnitzky). Rakovaya Bay, Avacha Bay, Kamchatka (L. Stejneger). Solovarennaja Bay, Petropavlovsk, Kamchatka, 10-12 fathoms, algae (N. Grebnitzky). SPIRONTOCARIS KINCAIDI Rathbun. Spirontocaris kincaidi Rathbun, Proc. U. S. Nat. Mus., xxiv, 899, 1902. Near S. camtschatica. Fetnale.—Carapace short in relation to the abdomen. Rostrum one third longer than the carapace, not reaching tip of antennal scale, slightly concave above, horizontal, armed above with 5 (occasionally 6) teeth, two of which are on the carapace, the anterior tooth a little before the middle of the rostrum; tip acute; lower limb, as in all the gaimardii