OF SOUTHERN INDIA. 369 
be a Solariedia or of some allied genus. Coquand’s Delph. numida (Constantine, p. 181, pl. 3, 
fig. 7), though only known from a cast, is most probably a species of this genus, and as far as mere 
short description enables an opinion to be formed, it seems probable that the two French species 
described by Coquand as Delph. scalaris and eretacea are also correctly determined. TI shall note 
a characteristic large species from our South Indian cretaceous deposits, Delph. annularis, and 
another somewhat doubtful, Delph. rotedioides, Forbes, sp. 
Thus viewing ina general way the number of species representing the 
Trocuip# in the eretaceous period, we find that the true rrocuryz are most numerous, 
being characterized by forms such as Ziziphinus, Trochus, Tectus and Turcica 5 
next come the @zezuzLIv# represented by the genera Gibbula, Trochocochlea and 
Euchelus; then the pzzpurvuziv#, and last the thin shells of the mirearrrms. 
The species are never very numerous in secondary formations, and where they occur 
they remain very local. Exactly the same may be observed in the recent Trocurp» 
which are strictly littoral inhabitants. The most interesting fact resulting from 
a careful study of the mesozoic forms is the indication of most of the present 
generic types as being in existence already at this remote period. Some of the 
genera, like Twrcica, Trochiscus, Solariella, Delphinula, Huchelus and others which 
are rather rare recent, appear to have been formerly much more numerous, while 
the contrary seems to be the case with respect to Olanculus, Monodonta, Polydonta 
and others. 
Most of our species of Trocurpx* are from the uppermost beds of the South 
Indian cretaceous deposits, while those of the Tvrervzpz are from the lowest. 
LXXXVI. OXYTELE, Philippi, 1847. 
1. OXYTELE NoraBILis, Sfoliczka, Pl. XX1IV,«Fig. 2. 
Oxy. testa conico-ovata, apice obtusiusculo, anfractibus senis, convexis, sutura 
impressa junctis, levigatis; apertura oblique-quadrangulari, labro acuto, tenui; basi 
in medio callositate expansa tecta. 
Spiral angle 70°; sutural angle 8°- 10°. 
Height of shell »: diameter of its basis (considered as 1:00)... a 1-16. 
» of one whorl : its width} ( i WE a eee Re 0-45. 
Shell conically ovate with an obtuse apex; surface smooth; whorls six, convex, 
separated by an impressed suture, last roundish at the periphery ; base slightly 
convex, covered by an expanded callosity which is united with the lip, and not 
forming any distinct thickening on the same; aperture obliquely angular, outer 
lip slightly expanded and thin. 
I do not know a single cretaceous species which could be compared with this 
remarkable shell ; it possesses all the characters of the genus Oxytele. 
Locality.—Comarapolliam, in whitish sandstone ; very rare. 
Formation.—Arrialoor group. 
* With the exception of Delphinula. 
+ The whorls ought to be a little wider in Fig. 2. 
4X 
