41 



All the joints of the 3rd maxillipeds, except the dactylus, are abnormally 

 broad, coarse, and tomentose. 



The 5th pair of thoracic legs reach only to the middle of the antennal scale. 

 The basal spines of the chelipeds are big, and in the female there is one on the 

 8rd chelipeds as well as on the 1st and 2nd. 



The andricum has, on its outer edges, the same basal wing-like lobule as 

 that of P. sculptilis, but the organ ends in a pair of long calipers. 



The thelycum is concave and three-lobed : the middle lobe is very large 

 and leaf-like ; the lateral lobes, lying between the 5th pair of legs, are small, 

 and have between them, in the middle line, a globous tubercle, behind which 

 is a thick tuft of long sette. 



This species attains a length of 4J inches. It may turn out to be Kishi- 

 nouye's P. cormitus, a Japanese species also recorded by Nobili from Bombay. 



The Museum collection includes 12 specimens, registered as follows : — 

 4462 



9 

 44 66-73 



i» 

 5087 



10 



Type op male. Arakan coast. " Investigator." 



Types of female. Madras. Purchased. 



Bombay. " Investigator." 



5. Paeapeneopsis nana, Alcock. Plate VIII., fig. 26, 26a, h. 



Parapeneopsis nana, Alcock.. Ann. Slag. Nat. Hist. (7) xvi. 1905, p. .529. 



Compared with P. stylifera 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 post 

 rostral carina fades away at the posterior fourth of the carapace. 



The antero-inferior angle of the carapace is sharp-cut but not spiniform 

 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 Gth abdominal 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 5th pair of legs reach only to the middle of the antennal 

 scale. 



The andricum is slender and ends in a pair of long, straight, stiff filaments, 

 which stand out at right-angles to the rest of the organ. 



The thelycum resembles that of P. sculptilis, its most conspicuous part 

 being a large leaf -shaped median plate lying between the ith pair of thoracic 

 legs. 



6 



