MOLLUSCA OF INDIA. 167 
“ Diplommatina, nobis. 
“Char. Gen, Testa viv rimata, tenui, subovata ; spira elongata ; 
anfractibus convexis, costatis, ultimo subascendente ; apertura edentula, 
subcirculari ; peristomate duplicato, expanso ; marginibus callo 
parietal appresso junctis ; operculo nullo. 
“Sp. 1. D. (Bul.) folliculus, Pfr. Monogr. vol. ii. pp. 81-2. 
Carychium costatum, Hutt. MSS. 
“Sp. 2. D. (Carych.) costulatum, Hutt. MSS.” 
In 1867, Mr. W. T. Blanford sent the following to the Annals 
& Mag. Nat. Hist., from Central India :—‘ I have more than once, 
within the last few years, called attention to the circumstance that, 
in the supplements to Dr. Pfeiffer’s admirable monograph of the 
living operculated land-shells, the position assigned to the genus 
Diplommatina, close to Acicula, and in a suborder distinguished by 
the position of the eyes above the base of the tentacles, is not in 
accordance with the structure of the animal. For some years past 
I have not had an opportunity of reexamining the animal of any 
typical species of the genus. I am indebted to Captain Godwin- 
Austen for the accompanying outline sketch of the animal of a 
species of Diplommatina inhabiting the Western Himalayas near 
Masuri, and apparently a variety of D. pullula, Benson, which was 
first found by myself near Darjiling. ‘This species is a typical Diz- 
plommatina, with strong costulation and a well-developed columellar 
tooth.” 
The animal is sketched as it appears just emerging from the 
shell (vde Plate L. fig. 2, from original drawing). The eyes, as 
will be seen, are distinctly lateral, as in Cyclophorus. I can trace 
no difference between the animal of this form and that of the 
smooth or spirally-ribbed species of the Indian Peninsula, which 
are by Pfeiffer classed as dArinia, in the neighbourhood of Pupina, 
in a different family, and even a distinct suborder from their nearest 
allies the typical Diplommatine. 
Stoliczka (J. A. S. B. vol. xl. 1871, p. 152) has entered so fully 
into the subject of this genus and the many subgenera into which 
it has been divided, that there will be little new to say, after ex- 
tracting all he has written. 
Previously, in the same Journal (vol. xxxix. 1870), I gave, with 
drawings similar to those on Plate L. figs. 7, 7a, 76, 7c, 8, 8a, of 
this work, a detailed description of that portion of the shell situated 
near the aperture and columella, which I now reprint :— 
“In almost all the species of Diplommatina that I have examined, 
a constriction of the penultimate whorl is to be found, and in the 
larger species it is very well developed. This constriction of the 
whorl marks, of course, the position of the operculum when the 
animal is fully withdrawn into the shell, and the operculum of 
dead specimens is also to be found at this point. It would appear, 
from an examination of these shells, that the constriction also 
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