4 CARL BOVALLIUS, NEW ISOPODA. III. 



Tlic urus is longer than broad, almost rectangular, not cari- 

 natcd on thc upper side, thc hinder margin roimded. 



The animal iu (juestion is closely allied to Nerocila cebu- 

 ana, Schioedte and äIeinert, and N. jjha>opleura, Bleeker. With 

 the lirst it has in eommon thc shape of the pereion and of 

 the leo-s, with the latter most of the characteristics of the 

 plcon and of the urus. 



OvigerouH female. 

 Pl. I, fig. 1—12. 



The Jiead is wvy long, with the anterior margin broadly 

 rounded, thc antennae are fixed at the midth of the under-side, 

 leaving anteriorly a broad smooth, spade-shaped part of the 

 head. The head is longer than the first pereional segment 

 and half the second together (8 : 7), and bi-oader thun half the 

 fourth (11 :20); it is only a little shorter than broad (9:11). 



Thc eijes are black, small, A-cry distinct, situated ut the 

 hinder margin of thc head, distant by three fourths of the 

 bredth of the head. 



The first pair of antennce (Pl. I fig. 3) reach a little beyond 

 the anterior margin of the first pereional segment, they are 

 not compressed; they show a distinct three-jointed peduncle, the 

 second joint the longest, and a four-jointcd Hagellum, sliortcr 

 than thc two prcceding joints together. Thc joints of thc 

 Hagellum are c(|ual, cach carrying two oi" tlircc very short 

 hairs at the hinder outer corncr. 



The second j:>air (Pl. I lig. 3), are as robust as the first 

 pair, a little longer, totally smooth, without distinction between 

 peduncle and Hagellum; they reach to the middle of the first 

 pereional segment. 



Thc labriim is very prominent, broadly rounded at the lower 



margin. 



Thc maudihleii (Pl. I, fig. 4) are broad ; thc tip is strongly 

 arched, excavated at thc inner side, ending in a sharply pointed 

 edge with two broad tecth bclow; the whole is of the same shape 

 as tlic upper jaw of the bill of a faucon. Thc palp is short 

 but robust, the lirst joint is thc longest and thickcst, the second 

 only half as thick and a little shorter, the third tapering, as 

 long as thc second, provided with three or four minute bristles 

 at the tip. 



