170 



Records of the Indian Museum. 



[Vol. XII, 



Pontophilus plebs, sp. nov, 

 (Plate viii, fig. 5.) 



The rostrum is longitudinally channelled; its lateral margins 

 are convergent and meet in a narrowly rounded apex. The cara- 

 pace is devoid of pubescence and is not carinated. It bears seven 

 teeth, one situated mid-dorsally, close behind the rostrum and 

 separated from it b^' a shallow transverse groove, and three pairs 

 on either side. The latter comprise a stout hepatic tooth, on a 

 level with that in the middle line, and two small teeth, both in 

 advance of the hepatic, placed close together behind the sharp 

 spinous branchiostegal angle. In the anterior half of the carapace 

 there are obscure longitudinal furrows above and below the hepa- 

 tic tooth. 



The basal segment of the antennular peduncle (text-fig 5^) is 

 longer than the two following combined, externalh^ the distal 



Fig. 5. — Pontophilus plebs, sp. nov. 



a. Antennule. c. First peraeopod. 



b. Antennal scale. d. Second peraeopod. 



margin is produced to an acute tooth. The lateral process is more 

 or less oval in shape, longer than broad, and is anteriorly pointed 

 The second and third segments are broader than long. The an- 

 tennal scale (text-fig. 56) is only twice as long as broad ; the outer 

 margin is straight and terminates in a tooth which is far exceeded 

 by the distal end of the lamella. 



The third maxillipedes reach beyond the scale by about half 

 the length of the ultimate segment. The first peraeopods (text- 

 fig. 5c) are scarcely shorter. The outer edge of the merus termin- 

 ates in a large tooth and the margin between this tooth and the 

 articulation of the carpus is unarmed. The carpus bears a stout 

 external tooth. The hand is about two and a half times as long 

 as wide and the single tooth which forms the ' thumb' of the sub- 



