OXYCEPHALUS TUBERCULATU8. 63 



Tlie lateral parts of the pie onal segments are rounded in front, 

 below, and behind, and the under margins are without tooth- 

 like projections. 



The last coalesced ural segment is somewhat shorter than the 

 telson (?). 



The telsoii reaches beyond the apex of the last pair of uropoda. 



Si/n. 1862. Oxyceph.alus tuberculatus, Spence Bate. 20, p. 343 pi. 



54, fig. 5. 

 »• > » Th. Streets. 1877. 24, p. 136. 



» » » C.BovALLius. 1887.35, p. 36. 



In addition to the characteristics quoted in the diagnosis, and 

 which are taken from the description of Spence Bate, and with respect 

 to a few particulars from Streets work of 1877, I cite here some more 

 details from the same authors: 



Spence Bate says (1. c. p. 343). 



»Antepenultimate pair of pleopoda having the rami short, serrated; 

 penultimate not so long as the preceding, having the margins of the 

 rami smooth; ultimate not reaching to the extremity of the telson, 

 rami having the margins serrated. Telson acutely triangular, margins 

 serrated.» 



Streets says( 1. c. p. 136). 



»Head not quite as long as the first five segments of the thorax, 

 broad, inferior margin broadly convex;, rostrum more than half the length 

 of the head, triangular, acute; eyes large, covering the whole of the 

 lateral surfaces of the head. — — — The first pair of gnathopoda 

 shorter than the second, but similar to them in other respects; carpus 

 produced anteriorly nearly to the apex of the propodos, margins furnished 

 with a few long setse, not serrated; propodos subovate; dactylus nearly 

 half as long as the propodos. The flexible margins of ihe following 

 thoracic feet furnished with a few setse, or hairs». 



Colour. ? 



Length. 10 mm. (7.,,, tlis of an iuch, Spence Bate, and 0.4o of an inch, 



Streets). 

 Hab. Cape of Good Hope, (Spence Bate); The North Pacific 



Ocean, Lat. 5" N, Long. 128» W, (Streets). 



