240 Records of the Indian Museum. [Vol,. XXIV, 



Genus Dasycaris, nov. 



Rostrum long, laterally compressed, with teeth. Carapace lat- 

 erally compressed, sculptured, with regions well-defined; antennal 

 and hepatic spines present, each flanked by a strong carina. Anten- 

 nular peduncle with basal segment greatly narrowed distally ; anten- 

 nal scale well developed. Mandible without palp ; inner lacinia of 

 maxillula narrow : all maxillipeds with exopods, the second with- 

 out podobranch, the third slender. Carpus of first peraeopod not 

 divided into subsegments. Last three pairs of peraeopods with 

 strongly hooked dactylus, without basal protuberance and with- 

 out accessory claw. Pleura of third, fourth and fifth abdominal 

 somites drawn out inferiorly into long acute processes. 



Type and only known species, — Dasycaris symbioles, sp. nov. 



This genus is proposed for a remarkable Pontoniine prawn found 

 on Alcyonaria belonging to the genus Pteroeides. In most of its 

 characters the genus resemble Perichmenes, but the carapace is sculp - 

 tured,*the basal segment of the antennular peduncle is strongly 

 narrowed distally and some of the abdominal pleura are produced 

 inferiorly and end in very sharp spinous processes. The dactylus 

 of the posterior legs appears simple under low magnifications, but 

 when stained and examined under a high power it is seen to possess 

 a pit on the posterio'r margin, through which a fleshy process can 

 apparently be protruded. 



In certain species of Harpilhis (H. beaupresi and//, depressus) 

 the pleura of the fourth and fifth abdominal somites are acutely 

 produced infero-posteriorly, though not to the same extent as in 

 Dasycaris. In Harpilius, however, the carapace is depressed and 

 not sculptured and the basal antennular segment is very broad. 



In some respects Dasycaris resembles Nobili's little known 

 genus Coutierea. The latter, however, is a much more extreme 

 form, with a pterygostomian spine on the carapace and with 

 abnormally developed antennal and supra-orbital spines. In 

 Coutierea, moreover, the dactylus of the posterior legs bears a basal 

 protuberance, indicating affinity with Coralliccaris and Conchodytes 

 rather than with the Periclimenes group of genera. 



Dasycaris symbiotes, sp. nov. 



(Plate IX.) 



The rostrum reaches to the end of the second segment of the 

 antennular peduncle in the female, to the end of the third segment 

 in the male. It is straight, very slightly upturned at the tip and 

 is extremely shallow in lateral view. It bears above 5 sharp teeth ; 

 of these the three posterior are placed close together, with two 

 situated behind the posterior limit of the orbit, while the foremost 

 is little, if at all, in front of the middle of the rostral length. The 

 lower border is unarmed. Behind the rostrum in the middle of the 

 carapace there is another sharp tooth, widely separated from the 

 posterior of those forming the rostral series ; this tooth forms the 



