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PROCEEDINGS OF THE NATIONAL MUSEUM. 



VOL. XXXV. 



rather stout, second, fourth, and fifth joints rather broad, propodus 

 and dactyl rather stout. 



Infero-posterior angle of the third abdominal segment almost a 

 right angle but produced into a small triangular tooth. Last three 

 segments with a prominent dorsal tooth posteriorly on either side 

 of the middle. First and second uropods extending back to about 

 the same point but exceeding the third. Peduncle of first uropods 

 somewhat shorter than the rami and having a large terminal spine, 

 extending beneath the rami to about their posterior third. Peduncle 



Fig. 16.- Eokystheus dektatds. «i>:t. third segment <>f the abdomen; <i>h. first 



GNATHOPOD ; (III-. SECOND GNATHOPOD ; /./.. LOWER LIP ; mX\, FIKST MAXILLA; p±, FIRST 

 PERiEOPOD; t, TELSON ; UT-y, FIRST DROPOD ; Ur a , THIRD UROPOD. 



of second uropods nearly as long as the rami and having no large 

 terminal spine. In the small terminal uropods the inner ramus is 

 about half the length of the outer which is nearly as long as the pe- 

 duncle. Telson broader than long and distally truncated. 



Length. — About 1 1 mm. 



Locality. — A single female specimen from Station 4268, Afognak 

 Bay, Afognak Fsland, Alaska, K'>.17] fathoms. 



Type.— "Cat. No. 38557, U.S.N.M. 



