-297 Carcinological Fauna of India. 



The position of the above species in the key to the Indian specie* 

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

 I. Carapace remarkably rngose (or spinoae) ; 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. horrida. 



2 Carapace somewhat equilaterally triangular, vertically 

 iU iioxed 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 ambulatory 

 legs granular or nodular : abdominal convexities 



of female not spinate P. investigator!*. 



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 as the palm P. (Parthenomerus) 



efflorescent. 



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



1896. 



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

 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 

 Strasburg Museum. 



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

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

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

 affinities of the Raninidse are, through Cyclodorippe, with the Dorippidue. 

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

 Oxystomes of equal rank with the Galappidse, Leucosiidte and Dorippidee, 

 just as De Haan practically does. 



139 



