OF SOUTHERN INDIA. 353 
la. Tricolia, Risso, 1826. This name has been reserved for the small 
Phasianelle, which are said to have the neck-lobes not well developed, though this 
has by no means been satisfactorily proved. Except in the small size the shells 
do not offer any essential distinction from Phasianelle, on which account this 
group can hardly be considered even of sub-generic value; but it is probable that 
the inflated forms, which are at present included in that sub-division, may in 
time be considered as the types of distinct genera. 
2. Chromotis, A. Adams, 1863 (Ann. mag. nat. hist., XI, p. 19), has been 
proposed for species, like Phas. neritina, Dunk., from the Cape of Good Hope. The 
shell is ear-shaped, thin, polished ; spire very short; whorls few, rapidly enlarging ; 
aperture oval, columella flattened and solid. The operculum is calcareous. 
3. Leiopyrga, A. Adams, 1863 (Ann. mag. XI, p. 19). Shell turbinate, 
thin, smooth, polished ; aperture semicircular, shorter than the spire, inner lip thin, 
columella incurved, excavated. The type is Leiop. picturata, the locality, where it 
was found, not being known. 
4, Hucosmia, Carpenter, 1864 (Ann. mag. XIII, p. 475). Shell turbinate, 
solid, smooth; aperture with the margins nearly continuous, but not callous; colum- 
ella slightly excavated. 
The pz4staNELLIN#, or at least forms in every way identical with them, begin 
in the lowest. sedimentary formations, and are most numerous during the mesozoic 
period, from the expiration of which they somewhat decrease. The recent species 
will amount to about 60; they are found in all parts of the tropical and sub- 
. tropical seas, but are never very numerous. 
Pictet gives in Mat. Pal. Suisse, 3me. Ser., pp. 462-463, a list of 14 species from 
the cretaceous deposits of Europe. In this list the Ph. gosawica and conica of 
Zekeli have to be considered as identical under the former name. Phas. Reussiana, 
Stol., has been proposed for another Gosau-species, which has erroneously been 
identified by Zekeli with Ph. ervyna of d’Orbigny (vide Stoliczka, Revision 
der Gosau-Gast., ete., p. 57—Sitz. Akad., Wien, 1865, LII). The Pa. imvoluta, 
Giebel=Pyramidella id. of Miiller, has most probably nothing to do with 
this genus. From America three species are known and from Eastern Asia 
one. Within the last few years there have not been any additions made to this 
number of cretaceous species, which so far as they have been represented by reliable 
figures and descriptions, appear to belong without exception to the genus Phasianella, 
as restricted. 
Phas. Absalonis, Fraas (Witrtemb. nat. Jahreshefte, XXIII, 1867, p. 240), 
does not belong to this genus, but more probably to Trochacteon. 
I have to report from the South Indian cretaceous rocks three species, one of 
which, Ph. mceerta, has already been described by Prof. Forbes; and two are new, 
Ph. globoides and conula. Thus the total number of cretaceous Phasianelle at 
present amounts to about 20 species. 
