100 CARL BOVALLIUS, THE OXYCEPHALIDS. 



straight, or slightly curved, slender, not produced at the apex of the 

 third joint of the peduncle. In the one specimen of this sex in the 

 collection the spine of the fifth epimeral was absent)). 



COLOUE. ? 



LENGTH. The male 1015 mm; the female 10 mm. (STREETS). 



HAB. The tropical region of the Pacific, the male at Lat. 25" 13' 



to 26 13' N, Long. 143 15 W; the female at Lat. 25 50' N, 



Long. 132 45' W. (STREETS). 



.2. StebMngella typhoi'des, GLAUS, 1879. 



PI. IV, fig 1012; and p. 27, fig. 30. 



Diaqn. The segments of the body are bulging and protruding, but 

 not carinated. The fifth epimeral has a prominent, curved 

 spine, directed backwards. 



The head is a little longer than the first five personal seg- 

 ments together. The rostrum is narrow and sharp-pointed, 

 and is half as long as the rest of the head. 



The first four joints of the second pair of antennas are un- 

 equal in length and strongly arched. 



The first pair of perceopoda have the under margin of the 

 carpus smooth, with the hind corner projecting into a spine- 

 like tooth; the hind margin of the metacarpus is about as 

 long as the under margin of the carpus. The second pair 

 have the carpus like that in the first pair; the hind margin 

 of the metacarpus is shorter than the under margin of the 

 carpus. On the femur of the fifth and sixth pairs there are 

 no pits, but along the middle of the femur of the seventh 

 pair there is a long ridge and two pits. The seventh pair 

 are much longer than the femur of the sixth, and reach 

 almost to the apex of the tibia of that pair. 



The pleon is a little longer than the last four personal segments 

 together; the under margin of the pleonal segments is al- 

 most straight; the hind corner is produced and sharp-pointed. 



The last coalesced ural segment is more than twice as long 

 as the telson. 



The first pair of uropoda reach to the apex of the telson. 



