eee hn ee PpOorR rt ON -A COLLECTION OF 
MOLLUSC AS MwROW THR OURSKIRTS 
ORIN AGE. C UA. 
By Hi. Be PRESTON, [.Z.S. 
Class GASTROPODA. 
Order PULMONATA. 
Suborder GEHYDROPHILA. 
Family AURICULIDAE. 
Scarabus plicata, Feér. 
Prodrome, p. 101. 
Chingrighatta, outskirts of Calcutta. 
Order PROSOBRANCHIATA. 
Suborder PECTINIBRANCHIATA. 
Family NASSIDAE. 
Nassa denegabilis, Preston. 
Rec. Ind. Mus., X, 1914, pp. 297-298. 
Canal near Chingrighatta, outskirts of Calcutta (a single 
young specimen). 
Nassa orissaénsis, Preston var. ennurensis, Preston. (MS.) 
Canal near Chingrighatta, outskirts of Calcutta (a single 
specimen). 
Nassa fossae, sp. n. 
Shell allied to N. orvissaénsis, Preston, but differing from 
that species in its larger size as com- 
pared with the type and both larger 
size and much broader form as com- 
pared with the above variety; the 
subperipheral band is of a whitish 
colour and the spiral lirae are consi- 
derably coarser and very much more 
numerous, the aperture is much 
broader and the columella margin is 
distinctly curved; it is 6 whorled. _ 
Alt. 9°5, diam: maj. 5°5, diam. Fic. 1.—Nassa fossae, Spee Fe 
3 : », Ia.— do.,_ sculpture, x6. 
min. 4°5 (nearly) mm. 
Aperture: alt. 4, diam. 2°75 mm. 
Hab.—Canal near Chingrighatta, outskirts of Calcutta. 
