456 Records of the Indian Museum. [Voi,. XXIV, 



extends to the level of the distal end of that appendage. In 

 young specimens the terminal lobe of the scale is not so long as in 

 fully grown animals. 



In the male the pseudobranchial rami of the second to the 

 fourth pleopods are spirally twisted. In the fourth pair of pleo- 

 pods, the endopod and exopod are about equal in size and the 

 endopod is only slightly modified. The terminal joint bears two 

 setae, a short plumose seta, and a very long stout seta slightly 

 curved and not plumose. 



The presence of the three small spines at the apex of the 

 telson brings this species more into line with the normal species 

 of the genus, but the peculiar form of the outer uropod and 

 the unusual shape and spinulation of the telson are unique. 



Distribution. — Hansen's single specimen was taken off the 

 coast of Obi Major in the East Indian Archipelago. No other 

 records are known. 



Siriella paulsoni Kossmann ? 

 Siriella paulsoni, Tattersall, 1906, p. 160, pi. i, figs. 3-7. 



Localities.- — Pamban, Gulf of Manaar, exposed reef, from pools. 

 One female, 10 mm. 



Kilakarai, Gulf of Manaar, from weeds, 0-2 fathoms. One 

 female, 12 mm. 



Remarks. — These specimens belong certainly to the same 

 species as the single female I recorded from Ceylon under this 

 name. In view of the recent advances in our knowledge of this 

 genus I now think it doubtful whether the species is really the 

 same as that described by Kossmann. Certainty on this point 

 can only be obtained when male specimens are available for 

 examination. In the meantime I record the present specimens 

 under S. paulsoni to indicate that they are the same as the Ceylon 

 specimen. 



Genus Hemisiriella Hansen. 

 Hemisiriella parva Hansen. 



Hemisiriella parva, Hansen, 1910, p. 47, pi. vi, figs, za-c. 

 ,, ,, Colosi, 1918, p. 6. 



., ,, Zimmer, 1918, p. 16, text-figs. 5-7. 



,, ,, Colosi, 1920, p. 236, pi. xviii, figs. 2a. 



Locality. — Port Blair, Andaman Islands. 

 St. 3. One young specimen. 



St. 19. Three males and three females, 5-65 mm. 

 St. 21. Seventeen specimens. 



Remarks. — These specimen agree rather with Zimmer's descrip- 

 tion than with Hansen's. Particularly is this so with the form of 

 the eyes which are longer and narrower than Hansen shows them. 



Distribution. — Waters of the East Indian Archipelago and 

 Bay of Bengal (Hansen); Bay of Bengal (Colosi); Java (Zimmer). 

 These specimens were all taken in plankton. It is therefore interest- 



