40 



The longitudinal suture of the carapace runs nearly to the level of the 

 transverse suture. 



The 6th abdominal somite is as long as the telson : the telson is very short, 

 not reaching the middle of the inner caudal swimmeret, and is without marginal 

 spinelets. 



The antennular flagella are equal and a little shorter than their peduncle. 



The 3rd maxillipeds nearly reach the middle of the antennal scale and sur- 

 pass the tips of the 5th thoracic legs 



The spine on the basis of the 1st chehpeds is very slender, and that on the 

 2nd chelipeds is not distinguishable. 



The andricum, like that of P. sculptilis, has on each outer margin a wing- 

 like basal lobule, beyond which it simply tapers to end in four hooks, of which 

 the anterior pair are small and are concealed by the posterior pair in the flexed 

 position of the organ. 



The thelycum consists of a square plate between the 5th pair of legs, and 

 a semicircular one between the 4!th. 



Four specimens, registered as follows : — 



7359-60 5088 



10 



Types. Ganjam coast. " Investigator." 



4. Parapeneopsis MAXiLLiPEDO, Alcock. Plate VIII., fig. 24, 24a., h. 



? an Pensrun cornutu.';, Kishinouye, Jonni. Fish, Bureau, Tokyo, VIII. 1903, i. p. 23. Alcock, .^nn. Mag. 

 Nat. Hist. (7) xvi. 1905, p. 527. 



Compared with P. stylifera it presents the following differences : — 



The dorsal half of the carapace is tomentose. The rostrum is recurved at 

 tip but otherwise is nearly horizontal, it does not reach the end of the antennu- 

 lar peduncle in either sex, and it is armed dorsally with 8-10 teeth (not includ- 

 ing the isolated epigastric tooth) which form a very decided crest. The 

 post-rostral carina, which is continued right up to the posterior border of the 

 carapace, is sharp and particularly prominent. 



The antero-inf erior angles of the carapace are merely dentiform : the sinu- 

 ous subhepatic ridge (defining the anterior part of the cervical groove) stops 

 far short of the antero-inferior angle of the carapace. 



The longitudinal fissure of the carapace extends only a short way behind 

 the level of the hepatic spine. 



The telson is short and has no marginal spinelets. 



The antennular flagella, which are equal, are about two-thirds the length 

 of their peduncle. 



