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PROCEEDINGS OE THE NATIONAL MUSEUM. 



VOL. XXXV. 



Infero-lateral angle of third abdominal segment rounded. Fourth 

 abdominal segment with a dorsal carina which increases in height 

 toward the posterior end, where it is somewhat upturned. Rami of 

 first uropods slender, about as long as peduncle; the outer one 

 slightly narrower than the inner, but nearly as long and devoid of 

 spines; inner ramus with two short spines. Rami of second uropods 

 shorter than peduncle, much broader than those of first pair, nearly 

 equal in length and armed with several short spines. Terminal 

 uropods with flattened subequal rami furnished with long plumose 

 setae; extremities blunt. Telson twice as long as broad, cleft to base, 

 and tapering beyond middle. 



Length. — 13 mm. 



Locality. — Station 4381, a single female specimen, off North Coro- 

 nado Island, 618-667 fathoms. 



Type.— -Cat. No. 38542, U.S.N.M. 



Fig. 19. — Amfelisca macrocephala, female. ab 3 , third segment of the abdomen ; 



p-2, SECOND PERiEOPOD ; p s , THIRD l'ER.EOPOD ; pr„ FIFTH PERJBOPOD 5 t, TELSON; «r 3 , 

 THIRD UROPOD. 



AMPELISCA MACROCEPHALA Lilljeborg. 



Localities. — Station 4522, Monterey Bay, 130-149 fathoms, one 

 specimen ; Station 4549, Monterey Bay, 56-57 fathoms, two specimens; 

 Station 4551, Monterey Bay, 46-56 fathoms, one specimen; Station 

 4555, Monterey Bay, 66-69 fathoms, one specimen. 



