i9^3-] Stanley Kemp : Crustacea Decapoda. 305 



a number of small movable spines arranged in two linear series. 

 The dactylus bears a single terminal spine and numerous short 

 hairs and is about two-sevenths the length of the propodus. 



The branchial formula is the same as in other species of 

 the genus. 



The telson is broad with a triangular apex. It bears two pairs 

 of dorsal spinules and two pairs at the apex (fig. 23). Of the 

 latter, those of the outer pair are ver^^ small, while those of the 

 inner are larger and extend a little beyond the apex. Between 

 these spinules the margin is furnished with long plumose setae. 



There can, I think, be very little doubt that the specimens 

 described above are correctly referred to de Man's P. hendersoni 

 from Darjiling ; but it is strange that in the original description 

 no mention is made of the characteristic grooving of the fingers 

 of the large chelipede. In the Indian Museum are numerous 

 examples of this species from the valley below Kurseong, a locality 

 at no great distance from Darjiling, collected by Dr. Annandale 

 and Mr. F. H. Gravely, and in these specimens the grooves on 

 the fingers are clearly shown. 



The Abor specimens agree with de Man's description and 

 differ from the Kurseong examples and from most of those 

 recorded by Miss Rathbun in having the fingers of the second 

 peraeopod as long as, or a trifle longer than the palm. 



The species has hitherto been recorded only from Darjiling 

 {de Man) and from the Gokteik gorge on the border of the 

 southern Shan States in Burma (Rathbun). 



Palaemon hendersoni was found plentifully in the Abor country 

 in the Sirpo stream near Renging (Regd. nos. ^—^) ^^^), and in 

 the Egar stream between Renging and Rotung (4J-^ ^-^). 



Family ATYIDAE. 



Genus Caridina, H, Milne-Edwards. 



Caridina weberi, de Man, var. 



(Plate xix, figs. 24, 25 ; plate xx, figs, 26-28.) 



A Caridina which occurs in abundance in the Darrang district 

 in tributaries of the Brahmaputra and has been found in the main 

 river itself at Dibrugarh and Kobo appears to represent a race of 

 C, weberi, de Man. This species was originally described from 

 Flores and Celebes (de Man, 1892) ' and a variety called sumatrensis 

 is recorded from Sumatra (de Man, 1892),* from Engano I., near 

 Sumatra (Nobili, 1900) ^ and from Cochin China, Siam and the 

 environs of Bombay (Bouvier, 1905).* 



' In Max Weber's Zool. Ergebn. Reise niederl. Ost.-Ind., II, p. 371, pi. xxii, 

 fig. 23. 



^ Ibid , p. 375, pi. xxii, fig. 23g. 



3 Ann. Mus. Civ. Geneva (2), XX, p. 476. 



♦ Bull. Sci. France et Belg., XXXIX, p. 83. . 



