108 CARL BOVALLIUS, THE OXYCEPHALIDS. 



The peduncle of the first pair ofuropoda(p. 38, fig. 71) is about 

 three times as long as broad, with feebly convex and serrated margins; 

 it is longer than the last coalesced ural segment, and nearly twice as 

 long as the outer ramus, which is more than a third longer than the 

 inner; the rami are lanceolate, and serrated on both margins. The 

 second pair reach fully as far as the first; the peduncle is longer 

 than the last coalesced ural segment, and more than three times as long- 

 as broad, with the margins serrated; the outer ramus is more than half 

 as long as the peduncle, and a little longer than the inner; the rami 

 are narrower than in the first pair, and are serrated on both margins. 

 The third pair are not twice as long as the telson; the peduncle is some- 

 what broader than long, and a third part as long as the outer ramus, 

 which is a little longer than the inner; the rami are serrated as in the 

 preceding pair. 



The telson is broadly tongue-shaped, with the margins serrated, 

 and is twice as long as the peduncle of the last pair of uropoda. 



COLOUE. Yellowish white 



LENGTH. The male 17 mm, the female 9 mm. 



HAB. The tropical region of the Atlantic. 



2. Grlossocephalus spiniger, C. BOVALLIUS, 1887. 



PI. V, fig. 69; and p. 26, fig. 26; p. 29, fig. 43. 



Diagn. The head is longer than the first three peraeonal segments 

 together; the rostrum is not a third part as long as the 

 rest of the head. 



The metacarpus of the first pair of perceopoda has the hind 

 margin armed with a very long, sharp tooth at the middle, 

 and some small teeth above it, and the lower front corner 

 produced into a long, sharp-pointed tooth, which is about 

 half as long as the dactylus. The third pair are about as 

 long as the fourth, and much shorter than the fifth. The 

 carpus of the fifth pair is not twice as long as the tibia. 

 The sixth pair are fully as long as the fifth. The seventh 

 pair are much shorter than the femur of the sixth, scarcely 

 reaching to three-fourths of its length. 



The lateral parts of the phonal segments are angular behind. 



