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



cribed and figured the same species as Hilgendorf, but the form 

 of the third thoracic limb, more especially of its armature and the 

 gap in the series of spines arming the inner margin of the carpus, 

 which is indicated in Hilgendorf's figures and clearly shown by 

 Kossmann, renders it at least probable that both authors were 

 dealing with the same species. The unpublished drawings of 

 Bonnier agree in the greatest detail with Kossmann's figures. 

 The agreement is complete in the figures of the third thoracic limb, 

 even to the peculiar form of the ischium and to the arrangement, 

 number and forms of the spines arming the inner margin of the 

 carpus. In only one respect do Bonnier 's and Kossmann's figures 

 differ, namely, in the armature of the telson. Kossmann gives no 

 details in his description and his figuie indicates that the lateral 

 margins of the telson are armed distally with five spines, that 

 each apical lobe of the telson bears one long spine and that each 

 side of the cleft bears five spinules. Bonnier's figure shows that 

 the lateral margins of the telson are armed distally with eleven 

 spines, that each lobe of the telson bears two spines, the outer of 

 which is stouter and twice as long as the inner, and that each 

 margin of the cleft is armed with ten spinules. 



I conclude therefore, that Gnathomysis gerlachei Bonnier and 

 Perez must be considered undoubtedly as a synonym of Hetero- 

 mysis har-pax Kossmann, which is almost certainly the same as 

 H. harfax Hilgendorf. 



Heteromysis proxima, sp. nov. 

 Text-figs. 2&a-e. 



Locality. — From pools on exposed reef at Pamban, Gulf of 

 Manaar. One male and one female, 6-7 mm. (Types.) 



Description : — Eye small, longer than wide, without finger- 

 like process, cornea occupying less than half of the eye in dorsal 

 view and narrower than the rest of the eye. Antennal scale equal 

 in length to the antennal peduncle and shorter than the anten- 

 nular peduncle, three times as long as broad, setose all round, 

 terminal joint present. Third thoracic limb with the endopod 

 massive and stoutly built, ischium with the inner distal corner 

 not produced into an acute process, merus three times as long 

 as broad with a prominent blunt process at the distal end of 

 the inner margin, carpus stouter and longer than the merus, 

 about two and a half times as long as broad, inner margin armed 

 with spines of three kinds (1) stout simple spines, three or four 

 in number on. the distal part of the margin, (2) stout spines with 

 a truncate apex, one or two in number at the distal end, and (3) 

 slender spines bearing a single seta inserted some way from the 

 tip, extending all along the margin in two double rows of eight 

 or nine spines, between which the other spines are situated ; 

 penultimate joint small with an acute process at the distal end 

 of the inner margin ; nail long and strongly curved, one-third of 



