16. A short note on the cretaceous echinoid Cyrtoma, 
M’clelland. 
By H. C. Das-Gupta, M.A., F.G.S. 
: In the year 1917 I had an opportunity of visiting the 
~ Khasi hills in charge of a party of students from the Presidency 
College, Calcutta.. My collections from these hills include 
some cretaceous fossils, amongst which the following echinoids 
have been determined besides one biserial(?) diadematoid cast, 
the generic determination of which is not possible :— 
Hemiaster Sp. 
Discoidea Sp. aff. infera, Desor. 
Pyrina ataxensis, Cott. var. pentagonalis, Neetl. 
Pyrina ataxensis, Cott. var. tumida, Nootl. 
Cyrtoma Herschelliana, J. M. : 
OU oe bo 
genus Cyrtoma was established by the late 
Mr. J. M. M’clelland, one of the pioneer workers in the 
field of Indian geology.' The fossils were all obtained from 
unlike C. ovatus, d’Orb.,® but a comparison of the specimens 
Cyrtoma Herschelliana, J. M., the name adopted by me in the 
foregoing list. None of the specimens collected by me shows 
1 Cal. Journ Nat. Hist., Vol. I, pp. 155-187 with plates (1840). 
2 Op. cit., p. 184. 
8 Mem. Geol. Surv. Ind., Vol. I, pp. 164-165, footnote (1869). 
+ Mem. Geol. Surv. Ind., Vol. VI, p. 182 (1871). 
5 Pal, Fr. Echin. terr-cret., VI, pp 345-347, pls. 945, 946. 
