84 CARL BOVALLIUS, THE OXYCEPHALIDS. 



(1. c. p. 1589, pi. 204 A) is not identical with the present species, though 

 it seems to belong to the genus Streetsia. In the form of the urus and 

 of the first two pairs of perseopoda it comes near to Streetsia carinata. 



The short original description, of the species, given by GLAUS in 

 1879, and repeated in 1887, runs : 



Korper ziemlich gedrungen, mit glattem, starkem Integument, 

 circa 8 mm. lang. Schnabel massig lang, und shnauzenformig. Beine 

 minder gestreckt, mit langen Krallen bewaffnet. Die Greifhande der 

 beiden vorderen Paare kurz und gedrungen. Letztes Beinpaar mit sehr 

 schmachtiger Platte, diinn und gestreckt. Die vorderen stark gezackt, 

 die hinteren feingezahnelt. Abdomen sehr kraftig, glattraridig. Das 

 Caudaldoppelsegment kurz, merklich kiirzer als die Schwanzplatte. 



STEBBING gives in his Report of the ))Challengen> Amphiopoda an 

 exhaustive description and good drawings of Oxycephalus porcellus, 

 Specimen A, which most probabiy is identical with GLAUS' 0. porcellus. 



COLOUR. ? 



LENGTH. 8 ram. (CLAUS), a little over half an inch, (STEBBING). 

 HAB. The Indian Ocean, Zanzibar (CLAUS); The South Pacific, 



between Api and Cape York, surface* (STEBBING). 



3. Streetsia prono'ides, C. BOVALLIUS, 1887. 



PI. HI, fig. 712; and p. 23, fig. 9; p. 35, fig. 62. 



Diagn. The head is as long as the perason and half the first pleonal 

 segment; the rostrum is fully as long as the rest of the head. 

 The perceon is dorsally rounded. 



The under margin of the carpus of the first pair of perceopoda 

 is straight, with the hind corner obtusely rounded, not projec- 

 ting, and is serrated, with short, broad teeth; the hind margin 

 of the metacarpus is feebly serrated, and is fully as long 

 as the under margin of the carpus; the dactylus is about a 

 fifth part as long as the metacarpus. The under margin of 

 the carpus of the second pair is provided with a few short, 

 broad teeth, and has the hind corner very little produced, 

 and sharp-pointed ; the hind margin of the metacarpus is 

 armed with a few short, spine-like teeth along its lower 

 half, and is somewhat longer than the under margin of the 



