s 



297 Carcinological Fauna of India. 



The position of the above species in tlie key to the Indian sped?* 

 of the genus Parthenope, page 279 ante is thus shown : — 

 I. Carapace remarkably rngose (or spinose) ; chelipeds of the 

 ordinary Lambrus form : — 



1. Carapace somewhat pentagonal, not vertically de- 

 flexed from the front of the gastric region : abdominal 

 terga of the female with a series of large eroded pits 



down either side P. }<orrida. 



2 Carajjace somewhat equilaterally triangular, vertically 

 deflexed from the front of the gastric region : abdomi- 

 nal terga of the female with a series of convexities or 



nodules down the middle line, and on either side 



i. Edges of carapace very strongly spinate: carpus of 

 chelipeds and of ambulatory legs (like all the other 

 parts of the body) strongly spinate : abdominal 



convexities of female spinate p. spinosissima. 



ii. Spinature very little developed : edges of carapace 

 crenulate : carpus of chelipeds and of ambulatoiy 

 legs granular or nodular : abdominal convexities 



of female not spinate P. investigatoris. 



II. The whole body and all the appendages beset with delicate 

 paxilliform tubercles which unite to form a lace-work or 

 frosting : chelipeds tapering, with long slender spiny fingers 



which are nearly as long a*s the palm P. (Parthenomeru*) 



efflorescent. 



From the Journal, Asiatic Society of Bengal, Vol. LXV. Part II, No. 2, 



1896. 



Materials for a Carcinological Fauna of India. No. 2. The Brachynra 

 Oxystoma. — By A. Alcock, M.B., C.M.Z.S., Superintendent of the 

 Indian Museum. 



Plates VI— VIII. 



Received 7th May. Read 3rd June. 



The limits of the Tribe of Oxystoma here adopted are those 

 originally established by De Haan in the Fauna Japonica, and since 

 recognized by Ortmann in his account of the Decapod Crustacea of the 

 Sti'asburg Museum. 



I can hardly, however, go as far as Ortmann in uniting the 

 Leucosiidee and Raninidte in one section, Leucosiinea, co-ordinate in value 

 with the Dorippinea and Calappinea. Rather, it seems to me, the 

 affinities of the Raninidze are, through Cyclodorippe, with the Dorippidse. 

 But on the whole it seems enough to recognize the Baninidse as true 

 Oxystomes of equal rank with the Calappidw, Leuco&iidse and Dorippidse, 

 just as De Haan practically does. 



