60 Carl Bovallius, The Oxyoephalids. 



2. Oxyceplialus Clausi, C. Bovallius, 1887. 



The name is given in honour of Professor C. Claus. 



PI. I, fig. 19—24; PI. II, fig. 1; and p. 21, fig. 4; p. 22, fig. 7 and 8; 

 p. 25, fig. 22; p. 33, fig. 54; p. 36, fig. 65. 



Diagn. The body is somewhat compressed, the segments of the perseon 

 are scutellated, separated from each others by deep furrows. 



The head is shorter than the peraeon, with a moderately long 

 rostrum, which in the male is abruptly narrowed near the apex, 

 but in the female tapers evenly, and has the apex rounded. 

 The hind part of the head is a little longer than the rostrum. 



The front margin of the carpal process of the first two pairs 

 of perœopoda is longer than the hind margin of the meta- 

 carpus, which is serrated and bordered with strong bristles; 

 the lower front corner of the carpus protrudes a little 

 in the first pair and much in the second, forming a broad 

 heel in front of the metacarpus. The fifth pair are much 

 longer than the sixth. The femur of the sixth pair is almost 

 circular, much broader than that of the fifth, and about as 

 long as that of the seventh pair, which is itself longer 

 than all the following joints together. 



The lateral parts of the pleonal segments are rounded in 

 front; at the middle of the under margin of each projects a 

 strong, tooth-like process, and the hind corner is produced 

 and sharp-pointed. 



The last coalesced ural segment is only a little longer than 

 the telson. 



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



Syn. 1878. Oxycephalus tuberculatus, [Spence Bate] Th. Streets. 26, p 278, 



pl.2,fig.l. 

 1879. » piscator, [H. Milne Edwards] C. Claus. 27, p. 190 



(44). 

 . » , . 1887.36, p. 69, 



pi. 22, fig. 



1-9, andj)l. 



28, fig 1-8. 



1887, » Clausi, C. Bovallius. 35, p. 35. 



» » » Th.Stebbing. 1888. 39, p. 1566, 



pi. 201. 



