302 Records of the Indian Museum. [Vol. VIII, 



extends laterally almost to the longitude of the outer orbital tooth. 

 In typical feae, also, a broad transverse ridge across the epi- 

 branchial region in the neighbourhood of the posterior antero- 

 lateral spine limits anterior and posterior depressions and of this, 

 in the Abor examples, only the merest indication can be 

 found. 



I have been able to examine a number of P. feae taken in 

 December, 1910, in the Deshnoi river on the Assam-Bhutan 

 frontier in the north-east of the Darrang district (Regd. no. ^) 

 This series comprises both large and small specimens and the 

 evidence they afford leads me to believe that it may be necessary 

 at some future date to recognize different races of this species. 

 On comparing specimens of equal size, a slight but quite notice- 

 able difference can be observed in the prominence of the transverse 

 epibranchial ridges and in the character of the post-orbital crests. 

 The more important features of P. feae are well shown in all the 

 examples. 



This species was described by de Man from Bhamo and 

 Teinzo in the Upper Irrawaddy and has been recorded by Alcock 

 from Sadiya and the Dafla country. 



The specimens in the Abor collection were found at the 

 following localities: — 



Nov. 26th, 191 1. One very small example from the Dikrang 

 river near Sadi3"a (Regd. no. ^^). 



Dec. I2th, 1911. Three very small examples from the Brahma- 

 putra river at Kobo (-^^7') 



March 26th, 1912. Seven males and two females from a 

 stream near Balek C^^). 



All were found on the plains between elevations of 400 and 

 600 ft. I am almost certain that the species does not exist in the 

 hill streams at higher altitudes, though it was apparently in 

 such situations that specimens were obtained in the Dafla country 

 by Col. God win- Austen. 



Sub-family GECARCINUCINAE. 



Genus Paratelphusa, Milne-Edwards. 



Sub-genus Barytelphusa, Alcock. 



Paratelphusa (Barytelphusa) harpax, Alcock. 



1910. Paratelphusa {Barytelphusa) harpax, Alcock, Cat. Indian 

 Decapod Crust., pt. I, fasc. ii, p. 95. 



A single small specimen with the carapace 14 mm, in breadth 

 was found near Sadiya in the Dikrang river (Regd. no. ~). The 

 species appears to be widely distributed in Assam south of the 

 Brahmaputra and is also recorded from the vicinity of Harmutti 

 in the Dafla countrv. 



