Marine isopods collected in the Philippines by the fisheries steamer Albatross in 1907-08 . threetimes longer than the secondarticle, being 13 mm. long;fourth article more than oneand a fourth times longer thanthe third, being 23 mm. long;fifth article about equal to thefourth in length, being 24 ; the flagellum is composedof 10 articles, the first one ofwhich is almost as long as allthe others taken together. All seven thoracic segmentsare furnished with two tuber-cles each, close to the posteriormargin, one on either side ofthe median line. The fourthsegment is about one and afour
Marine isopods collected in the Philippines by the fisheries steamer Albatross in 1907-08 . threetimes longer than the secondarticle, being 13 mm. long;fourth article more than oneand a fourth times longer thanthe third, being 23 mm. long;fifth article about equal to thefourth in length, being 24 ; the flagellum is composedof 10 articles, the first one ofwhich is almost as long as allthe others taken together. All seven thoracic segmentsare furnished with two tuber-cles each, close to the posteriormargin, one on either side ofthe median line. The fourthsegment is about one and afourth times longer than thethird. The epimera are distincton all the segments with the ex-ception of the first ; on the sec-ond, third, and fourth segmentsthey are small and anteriorlyplaced; on the three last seg-ments they are large and con-spicuous and situated aboutfig. 24.—arctueus hastiger. x ih the middle of the lateral (Drawn by Miss V. Dandridge.) margin The abdomen is composed of three segments, two short ones and theterminal segment, which ends in a pointed extremity, and has two. no. 1701. NORTHWEST PACIFIC ISOPODS—RICHARDSON. 101 small tubercles on the middle of the dorsal surface, one on eitherside of the median line. At the base of the segment there is a prom-inent lateral tooth or projection on either side. The first four pairs of legs are furnished with long hairs and areanteriorly directed; the last three pairs are ambulatory. There arefour pairs of marsupial plates. (The female is described and figured.) A large number of specimens come from station 4982, on the wayfrom Hakodate, Hokkaido, Japan, to Otaru, Hokkaido, Japan, bythe Tsugaru Strait, at Benkei Mizaki Light, S. 3° E., miles (° N.; long. 140° 10 30 E.), and station 4983 (lat. 43° 01 35 N.;long. 140° 10 40 E.). Depth.—Three hundred and ninety to four hundred and twenty-eight fathoms in green mud. Young specimens differ from the adults in having the tubercles onthe head replaced by s
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Keywords: ., bookcentury1900, bookdecade1910, bookpublisherwashi, bookyear1910
