16 BOV.VLLIUS. XEAV ISOPODA. 



The colour is yellowisk-Avliite, with small dark-green spöts 

 (the Atlantic specimeu), or red-brown with dark spöts (thc 

 Indian specimen). 



Lerigth. 25 — 30 m. m. 



Adult male. 

 Pl. III. fig. 31. 



The body couvex, the anterior part broader, tapering back- 

 wards, more than twice as long as broad (37 : 14). 



The head triangulär, broader than half of" the fourth pe- 

 reional segment (16 : 15), broader than long (8 : 5), deeply 

 immersed. 



The first pair of antennoi longer than the second, reaching 

 beyond the anterior margin of the first segment. 



The first segment of the pereion is the longest, being as 

 long as the fifth and the sixth together; the anterior corners 

 are produced into short processes on each side of the head. 

 The second, third, and fourth segments are equal in length and 

 breadth. The fifth, sixth, and seventh are dccrcasing in length 

 and breadth. The seventh segment is narrower by a third 

 than the fourth. 



The pleon is deeper immersed than in the female. The 

 visible part of the first segment is narrower than half of the 

 fifth. The first segmeijt is the shortest, the folloAving are of 

 the same breadth but increase in length. The pleon and urus 

 together occupy about a fourth of the length of the whole 

 animal (10 : 39) (In G. laticauda about a third (25 : 74). 



The urus is broader than long (5 : 3) ; the anterior margin 

 is straight, the lateral and posterior margins broadly rounded. 



The uropoda reach as far as the hinder margin of the urus. 



Colour: Yellowish-white, without spöts. 



Length. 11 m. m. 



21ie larva of the first stage. 

 Pl. III. fig. 32, 33. 



Resembles very much the larva of G. laticauda; the difte- 

 rences are only slight. 



