Marine isopods collected in the Philippines by the fisheries steamer Albatross in 1907-08 . eamer type is in the U. S. National Museum. Cat. No. species is very similar to Iolella spinosa (Harger), and differschiefly from that species in lacking spines on the dorsal surface ofthe body. Genus RHACURA, without rostrum, but with a triangular median frontal proc-ess. Lateral margins of head with two triangular processes; eyessmall, but distinct. First pair of antennae with a peduncle of threearticles and a multi-articulate flagellum; second pair of antenna?wit
Marine isopods collected in the Philippines by the fisheries steamer Albatross in 1907-08 . eamer type is in the U. S. National Museum. Cat. No. species is very similar to Iolella spinosa (Harger), and differschiefly from that species in lacking spines on the dorsal surface ofthe body. Genus RHACURA, without rostrum, but with a triangular median frontal proc-ess. Lateral margins of head with two triangular processes; eyessmall, but distinct. First pair of antennae with a peduncle of threearticles and a multi-articulate flagellum; second pair of antenna?with the third article of the peduncle furnished with an antenna!scale. First and fourth thoracic segments with one lateral process oneither side; second, third, fifth, and sixth segments with two lateralprocesses; seventh thoracic segment with three lateral processes. , Abdomen furnished with four lateral triangular processes on eitherside. Legs as in the genus Iolella. This genus differs from Acanthaspidia Stebbing, the type ofwhich is Acanthaspidia typhlops (Sars),b in the presence of eyes,. Fig. 1.—Iolella glabra. a Acanthaspidia Stebbing—Acanthoniscus Sars, Hist. Crust., 1893, p. Norwegian North-Atlantic Expedition, XIV, Zoology, Crust., I, 3885,119-121, pi. x, figs. 27-30. pp. No. 1633. LOME NEW ATLANTIC 180 POD A—RICHARDSON. 73 in having the first pair of legs prehensile, and not similar to thefollowing pairs as in that genus, in having the legs furnished withbi-unguiculate dactyli; in not having a bifurcate rostrum, in havingthe fourth thoracic segment produced laterally in one process andnot two, in having the fifth and sixth thoracic segments producedlaterally in two processes and not three, in having the lateral marginsof the abdomen produced in four large processes and not eight as inthat genus. It differs from Iolanthe Beddard a in the presence of eyes, in havingthe first pair of legs prehensile, and not similar to the succeeding pairsas in that genus, in
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