of the ^' Genus '' Peneus. 529 



(defining the anterior portion of the cervical groove) does 

 not reach the antero-inferior angle of the carapace. 



Dorsal of the hepatic spine the cervical groove is very 

 distinct up to the longitudinal suture of the carapace, this 

 being a quite distinctive feature. 



The longitudinal suture of the carapace runs nearly to the 

 level of the transverse suture. 



The sixth abdominal somite is as long as the telson ; the 

 telson is very shorty 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 third maxillipeds nearly reach the middle of the 

 antennal scale and sui'pass the tips of the fifth thoracic legs. 



The spine on the basis of the first chelipeds is very slender 

 and that on the second 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 fifth 

 pair of legs and a semicircular one between the fourth. 



Ganjam coast, 10-11 fathoms. 



The largest male is 3^ inches long. 



6. Parapeneopsis nana, sp. n. 



This is a small species, the largest female being only 

 2^ inches long, but from the finished form of the andricum 

 (petasraa) I take the representatives of it to be adult. 



Compared with Parapeneopsis stylifera (Edw.) it shows 

 the following differences : — 



The rostrum, though in all respects similar, is shorter, so 

 that its styliform portion does not quite reach the end of the 

 antennular peduncle. The postrostral carina fades away at 

 the posterior fourth of the carapace. 



The antero-inferior angle of the carapace is sharp-cut, but 

 not spiniforra, and the sinuous subhepatic ridge defining the 

 anterior part of the cervical groove falls far short of it. 



The telson is generally shorter than the sixth ai)domi;ial 

 somite ; its median dorsal groove is short and shallow, and it 

 has no lateral marginal spinelets. 



The antennular flagella, which are equal, are about one 

 third the length of their peduncle. The fifth pair of legs 

 reach only to the middle of the antennal scale. 



Ann. ct; Mag. N. Hist. Ser. 7. Vol. xvi. 33 



