456 



BULLETIN 54, UNITED STATEf^ NATIONAL MUSEUM. 



Fig. 509.— Janiropsis kin 

 CAIUI. Maxilliped 



X 77. 



JANIROPSIS KINCAIDI Richardson. 



Janirojjuis Hncaidi Richardson, Harriman Alaska Exp., Crust., X, 1904, pp. 

 221-222; Proc. U. S. Nat. Mu.^., XXVIT, 1904, pp. 665-667. 



Locality. — Y<akutat, Alaska. 



Color of body light brown, profusely and densely covered with black 

 markings. 



Plead wider than long; frontal margin nearly straight, with lateral 

 angles rounded. Eyes large, 

 black, situated some little distance 

 from the lateral margin. First 

 pair of antenna? short; flagellum 

 consisting of only eight joints in 

 the female, of ten in the male. 

 Second pair of antenna? lost in all 

 the specimens. Maxillipeds with 

 palp consisting of live joints, the 

 lirst three of which are very much 

 dilated. 



The first segment of the thorax 

 has the lateral margins straight; 

 the epimera are rather bilobed, and occupy most of 

 the lateral margin of the segment. The second, third, 

 fourth, and fifth segments have the antero-lateral an- 

 gles produced into rounded lobes. The epimera of 

 the second and third segments are situated about the 

 middle of the lateral margin; those of the fourth and 

 fifth segments occupy more of a pos- 

 terior position on the lateral margin. 

 The epimera of the last two segments 

 are situated at the post-lateral angles of the segments 



The abdomen is broad, gradually be- 

 coming somewhat narrower toward the 

 posterior extremity. The posterior mar- 

 gin is produced in three lobes, two lateral 

 lobes, one on either side of a broadly 

 rounded median lobe; the two lateral 

 lobes are acute. The uropoda are short, 

 not longer than half the length of the 

 terminal segment of the body; the basal 

 segment is broad, quadrate in shape, and shorter than 

 either branch; the inner branch is somewhat longer than 

 the outer one. The first pleopoda in the male are ver}" 

 similar to the figure given by Sars" of the first pleopoda in the type 

 species of the genus, Junlro/hsiii hreviremiiH. The distal extremity of 

 the peduncle and the branch are produced and fused. 



Fig. 510.— Janiropsis 



KINCAIDI. X 20i. 



Fig. 511. — Janirop- 

 sis KINCAIDI. 



Last thoracic 

 segment, abdo- 

 men, and uro- 

 PODA. X 20^. 



Fig. 512.— Janirop- 

 sis KINCAIDI. 



Uropod. X 77. 



"Crustacea of V'^*-- 



^T. 1S99, p. 102. 



