OF SOUTHERN INDIA. 281 
the Paris basin six species of this genus, all that were known to him. Since the 
commencement of my work on the cretaceous Gastropoda of the Gosau formation, 
T have been acquainted with two species from these deposits, and noted them in my 
Revision (p. 22, quoted above); namely, Keilostoma conicum et tabulatum, Zek. sp. 
Not having then been in possession of Deshayes’ Volume, I also gave a short account 
of the characteristics of this remarkable genus. At the same time (loc. cit., p. 23), I 
remarked that Keilostoma (Rissoa) Winkleri, Mill. (Monog. Aach. Kreidef., 1851, 
pt. IL, p. 8, pl. 3, fig. 6,) might be identical with K. conicum, and I still think 
that this identification is very probable. Guéranger (Album pal. de la Sarthe, etc., 
1867, pl. 10, fig. 18,) gives a figure of a Hulima Cenomanensis, which species 
is evidently a Keitlostoma, and probably the same which he had previously named 
Rissoina Cenomanensis. No other species, which could positively be referred to 
this genus, have to my knowledge been since described. But from the South 
Indian cretaceous deposits I have to add three new forms, K. substriatum, subulatum 
and politum ; thus we have now thirteen species known of Keilostoma, six eocene,* 
and seven middle and upper cretaceous ones; no doubt the number of the species 
will soon rapidly increase. The largest form as yet known of the. genus is the 
Keil. tabulatum, Zek., from the Gosau formation; its total height bemg about one 
and a half inch. 
I may remark that there are a number of recent species of Hulimat known, 
which have an aperture very much like Keilostoma, being oblique, anteriorly 
sub-effuse, with the inner lip somewhat thickened, and the outer lip anteriorly pro- 
duced, very much as in Rissoma; but none of. these Hwlime have the outer lip 
externally thickened, they are also quite smooth and polished. It is probable that 
they have to be separated under a new generic name, unless they can be referred 
to Bacula. 
1. K2ILOSTOMA sUBSTRIATUM, Séoliczka, Pl. XX, Fig. 20. 
Keil. testa elongato-conica, apice acuminata; anfractibus planiusculis, postice 
ad suturam abruptis, spiraliter 5 lineis impressis notatis, (tribus posticis atque 
duabus anticis); ultimo anfractu ad basin levigato; apertura late-ovata, obliqua, 
postice anguste subcanaliculata; labio valde imerassato, elevato; labro antice 
expanso, eatus callositate late marginato. 
Spiral angle 30°; sutural angle 13°. 
Height of aperture : totalof shell... (considered as 1:00) ... .. O34. 
Height of penultimate whorl : its width ( *) zy 4 dstatcee vee 0760. 
This species is principally characterized by the abrupt posterior termination 
of the whorls, and the five spiral lines on each of them; the two anterior ones often 
* The references to the figures of the species in the text of Deshayes’ Vol. II are not correct, and have 
to be changed according to those given in the explanation of the plates. 
+ Mr. G. Nevill collected two species of these Eulime at Mauritius and at Bourbon. One of them 
very much resembles in form the Hul. obesula, A. Adams. 
3% 
