396 Records of the Indian Museum. [Vol. XVI, 



LAMELIvIBRANCHIATA. 



Solen sp. Very minute; siphons normal, i.e. not as in the 

 Chilka Lake species {Mem. Ind. Mus., pp. 354-355, fig. 5). 

 Few specimens found. 



Fragile burrowing Lamellibranch with very long siphons. 

 Abundant. 



Gephyrea. 



Thalassema branchiorhychus, Annandale and Kemp. Abun- 

 dant in 1917. One doubtful specimen (without proboscis) 

 found in 1919. 



Thalassema microrhynchus , Prashad. With very small pro- 

 boscis. One specimen only of this interesting new species 

 found in 19 19. 



Crustacea. 



Isopod (? Sphaerona) living in burrows and rolling into a ball 

 like a woodlouse when disturbed. Common in 1919. 



Upogehia sp. One specimen only (1919), 



Alphaeus sp. The snapping of its claws could be heard in all 

 directions as one's weight pressed on its burrows. 



The invertebrates found between tide-marks on the shore 

 generally were as follows : — 



COELENERATA. 



Clavactinia gallensis, Thornely {Report on the Pearl Oyster 

 Fisheries of the Gulf of Manaar, II, pp. iio-iii, pi. i, fig. 3). 

 Abundant on Nassa and other shells, both living and in- 

 habited by hermit crabs. 



Clavactinia sp. Much denser and more luxuriant than the 

 former, and of a deeper pink colour, but possibly the same 

 species. Found only on the exposed ends of Chaetopterid 

 tubes in 19 19. 



Bimeria fluminalis, Annandale. {Mem. Ind. Mus., V, 

 pp. 111-114, text-fig. 10, pi. ix, figs. 3-3a). On post driven 

 into sand between tide-marks. This species has not hitherto 

 been found in the open sea. 



Obelia spinulosa, Bale — (see Annandale, Mem. Ind. Mus., V, 

 p. 106, fig. 9.) On exposed ends of Chaetopterid tubes. 



Cavernularia sp. Common every year except 1919, when no 

 specimens were seen. 



Virgularia sp. Apparently fairly common, especially in 1919, 

 near low-tide mark. Occasionally specimens are found 

 lying on the sand when they can readily be collected ; more 

 often they are embedded in mud or sand to within an inch 

 or two of the top. When touched or disturbed by pressure 

 they shoot down out of sight and out of reach with extra- 

 ordinary rapidity. 



