12.60 CRUSTACEA. 



gate, setae five, of moderate length. [Abdomen five-jointed, third 

 segment having a small process on the right.] 



Plate 81, fig. 5 a, animal, enlarged ; a', extremity of antenna ; b, 

 posterior part of cephalothorax in one specimen. 



Collected in the Straits of Banca, east of Sumatra, March 1, 1842 ; 

 also, March 4, at the east entrance of the Straits of Sunda. 



Length, one-tenth of an inch. Colour, yellowish, clouded with red 

 either side of intestine. This is a short and thick species, having the 

 thorax broad behind and long acute, and the antennae thrown very 

 much forward. The right male antenna is similar to that of the pre- 

 ceding species. 



The pigment of the inferior eyes in a vertical view forms a blue 

 spot, of reniform shape, just posterior to the superior eyes. The 

 caudal setae are subequal and nearly as long as the abdomen. The 

 anterior antennae have the apical joint a little longer than either of 

 the two preceding. In the right antenna, the geniculating articula- 

 tion is just anterior to the last four joints, or normally the last five, 

 the first of the four being a double joint. The joint preceding the 

 articulation is a little longer than the following one, and both are 

 straight. The minute pectination is nearly as in the P. strenua. The 

 right posterior angle of the cephalothorax is more prolonged than the 

 left, and is incurved ; and in one specimen there was a tooth on the 

 inner side. The shorter branch of the posterior antennae is very 

 short, not one-fourth the longer. 



III. Subgenus PONTELLA. 

 PONTELLA HEBES. 



Feminae : — Frons truncatus. Cephalothorax i-articulatus, postice rotun- 

 datus. Oculi superiores disjuncti, inferiores parvi. Antenna? anticm 

 fere corporis longitudine, transversa?, apicibus fronte paulo anterio- 

 ribus, prorsum parce curvatis, prope basin sells confertis longiuscuhs, 

 et una sublongd mobili, setis apicalibus articidi longitudine, posticd 



