64 Mr. James Cosmo Melvill on 



the growth of the species, so very abundant all round the 

 Bassein and Mahim coasts. Mr. Edgar Smith also concurs 

 in this view, that it is a mature species, and different 

 from the many already described, though it presents no 

 very important salient features. 



Raeta Abercrombiei, sp. nov. (PI. i, f. 25). 

 R. testa pertemii, hyalind, lacted, oblongo-ovatd, postice 

 rostratd, antice ovatd^gibbosuld, concentrice confertim itndato- 

 plicatd, tuinescentc, cordatd, uvibonibus parvis. 



Long. 23 mill. 



Lat. 30 „ 



Hab. Bombay {Abercrombze). 



A most beautiful, delicate, white papyraceous shell, 

 concentrically closely wave-ribbed, belonging to a small 

 genus which I do not find has hitherto been recorded from 

 the shores of Hindostan, though a nearly allied species R. 

 Grayi (A. Adams) is reported from Borneo. From this 

 '^qW R. Abercrombiei ^x'^Q.rs in its more close and regular 

 transverse plications, and the greater delicacy of the shell. 

 It would be interesting if, in years to come, an intermediate 

 form between the two were discovered on either the Eastern 

 coast of India, or in the Malay Peninsula ; it is more than 

 likely other species of this genus, hitherto so restricted, 

 will reward the collector. The type R. catialicidata (Gray) is 

 extremely common on the sandy sea coasts of South Carolina,, 

 and another larger and coarser species R. Californica (Sowb.) 

 is an inhabitant of the Western coasts of the United States. 

 R. pidchella (Ad. and Reeve) a very small and delicate form, 

 occurs in the Eastern Islands, and a few other species have 

 been described, but are hardly known. 



Tellina Kolabana, sp. nov. (PI. I, f 23). 



T. testd ovatd, albescentc, soHdiusculd, convexd, latere postico 

 valde bicarinato, antico oblongo, transversi7n concentrice liratdy 



