478 Records of the Indian Museum. [Vol. XXIV, 



establishing a new genus for his species. Hansen's species was 

 also represented b) T a single female and in consequence neither he 

 nor Illig was able to place the genus in its proper place in the 

 classification. Colosi (1920) had more abundant material and was 

 able to establish the fact that the genus belongs to the tribe I*ep- 

 tomysini. He described four new species, D. hanseni, D. zimmeri 

 D. taitersallii and D. microps. These species do not seem to me to 

 be founded on sufficient grounds. I regard D. zimmeri as a syno- 

 nym of the earlier D. quadrispinosa (Illig) and I do not think 

 D. tatter sallii is separated from D. pelagica by any characters of 

 specific value. This would leave four species in the genus. They 

 all agree in having the spines arming the telson confined to the 

 distal half of the lateral margins and thereby differ from the new 

 species described below, in which the spines extend throughout 

 the whole length of the lateral margins. All the hitherto described 

 species are pelagic and were taken at the surface in the open sea, 

 in contrast to the species in this collection which is littoral in 

 habit. 



The genus is very closely allied to Balhymysis Tattersall (1907 

 and 1911), and to Afromyais Zimmer (1916). It differs from the 

 former in the possession of well-developed eyes and from the latter 

 in the form of the second maxilla. 



Doxomysis littoralis, sp. nov. 



Text-figs. lya-e. 



Localities. — Port Blair, Andaman Islands. 



St. 3. Fifteen females, one male, 4 mm. 



St. 11. Nine females, one male, 5 mm. (Types.) 



St. 19. One male, 4 mm. 



Description. — Bod} 7 smooth, without spinules ; carapace pro- 

 duced into a very short triangular rostral plate with the apex 

 bluntly rounded, not covering the bases of the eyestalks. Eyes 

 of moderate size, cornea more than half as large as the whole eye, 

 slightly wider than the stalk, pigment black. 



Antennal scale outreaching the antennular peduncle by one- 

 third of its length, seven times as long as broad, setose all round, 

 terminal joint one-seventh of the total length of the scale, a promi- 

 nent spine on the outer distal corner of the basal joint. 



Thoracic limbs with the endopods long and slender, increasing 

 in length from the fourth to the eighth limbs, tarsus three-jointed, 

 nail distinct. 



Telson one and a half times as long as broad at the base, 

 cleft for one-third of its length, cleft wide, rounded at the apex, 

 armed with a pair of plumose setae and fifteen small spinules on 

 each margin, terminal lobes of more or less equal width through- 

 out, with the apex rounded, almost truncate, and armed with four 

 spines, the centre pair of which are subequal in size and slightly 

 longer than each of the lateral ones, the lateral margins armed 



