54 2 Memoirs of the Indian Museum. [Voi,. V, 1921.] 



Female. Resembling the male except in the gnathopods and in having the last 

 two joints of the peduncle of antenna 2 less elongated. The first gnathopod differs 

 from that of the male in having the carpus slightly shorter and without the rounded 

 lobe; the propod more than half the length of the carpus, narrowing slightly distally 

 so that there is no palm; finger slender, fully half as long as the propod. 



In the second gnathopod, the basal joint is much broadened especially in the 

 middle, having the anterior margin very convex and fringed with a number of short 

 spinules; the carpus has the,. posterior margin produced into a rounded or somewhat 

 angular lobe and the lobe of the propod extends far beyond the diminutive finger. 



Length of body of the largest males, about 10 mm. ; the females are slightly 

 smaller, one ovigerous one, however, measured 9 mm. 



These specimens agree so closely with the description and figures given by 

 Weber that I have no hesitation in referring them to his species, while the structure 

 of the first gnathopods, the dactyl of the second peraeopod and other characters 

 show that Stebbing was right in transferring the species to the genus Talorchestia. 

 The type specimens were taken under stones in and at the margin of the rivulet 

 Iyella on the south coast of East Flores in the Malay Archipelago, being found in 

 association with Orchestia floresiana, and, as the description of the locality given for 

 that species shows, the specimens were taken near the mouth of the stream, where 

 the conditions would probably be brackish as at L-ake Chilka. 



In addition to the brief description given above, the following additional 

 description of some of the appendages may be given : — 



The length of the second antennes (fig. 8b) varies considerably with the sex 

 and with the stage of development. In fully developed males they are nearly as 

 long as the body, the elongation being especially marked in the last two joints of 

 the peduncle. In females and in younger males they are much shorter, often not 

 more than one- third the length of the body. On the inner side the third joint of 

 the peduncle is produced along the side of the 4th joint into a distinct lobe similar 

 to that which is found in Talorchestia brito Stebbing; 4th and 5th joints subequal, 

 slender, with spinules; nagellum 20-jointed, rather shorter than peduncle. 



The first gnathopod of the male (fig. 8c) has the side-plate produced somewhat 

 anteriorly with the lower margin fringed with rather stout spinules ; the anterior 

 surface of the basal joint is grooved to receive the distal portion of the limb when 

 reflexed ; the carpus is nearly twice as long as the propod and is produced into a 

 narrowly rounded lobe at the postero-distal angle; the propod is only slightly 

 widened at the end, but is produced into the usual narrow rounded lobe ; the dactyl 

 is long and slender, reaching far beyond the rounded process of the propod. The 

 various joints are rather plentifully supplied with stout spinules, the distribution of 

 which is shown in the figure (fig. 8c). 



In the second gnathopod of the male (fig. 8d) the basal joint is of approximately 

 the same breadth throughout except at the narrow base, the anterior margin is 

 serrated and bears a regular row of numerous spinules, some also present on the 

 posterior margin; the propod is large, oval, with the palm oblique, slightly convex, 



