OF SOUTHERN INDIA. 451 
Actaonella involuta of Coquand (vide ibid., p. 522) is most likely a cast of one of the 
CyPrZiD2, to which also the Volvaria cretacea of Binkhorst will belong.* 
25. Act. eurta, Eichwald, Leth. Rossica, XI. Livr., 1867, p. 829. 
Bulla. 
26. Bulla avellana, P. and C. (Mat. Pal. Suisse, 5me. Ser., p. 172, pl. 60, fig. 1) is most 
probably a true Bulla. : 
27. Bulla Hornit, Gabb (Pal. Calif., I, p. 143, pl, 29, fig. 235) is not a Bulla, but either a 
Cylichna or more probably an Atys. 
28-33. Bulla macrostoma, Gabb, B. minor, M. and H., B. Mortoni, Forb., B. Nebrascensis, 
speciosa and volvaria of Meek and Hayden are quoted by Meek in his Check list of cretaceous fossils 
of N. America, p. 16. Of these B. Mortoni is evidently an Atys ; B. macrostoma may either belong 
to this genus or possibly also to Hydatina. 
Gabb in his Catalogue of cretaceous fossils (Proc. Am. Phil. Soc., VIII, p. 97) has also a 
species, Bulla occidentalis, M. and H., from Nebraska; I do not find this in the latter lists of 
American fossils. The Bulla Mantelliiana, Sow. apud Fitton, which the same author quotes from the 
Neocomien, is a species of Buliina (= Tornatina) from the Wealden. 
CVII. CYLICHNA, Zovén, 1846. 
1. OvyLicuna INERMIS, Stoliczka, Pl. XX VII, Fig. 20. 
Cyl. testa ovata, in medio subinflata, postice angusta ac sub-rotundata, antice 
latiore, spira infundibuliformi, immersa, superficie spiraliter minute striata ; apertura 
lente curvata, postice angusta, antice paululum dilatata; labio crassiusculo, antice 
via torto, fissura minuta. 
Width of shell : its height (considered as 1:00) ooo tee vee 0°47. 
This species is distinguished by its rather regularly oval form, being posteriorly 
slightly more attenuated than anteriorly, but rounded on both ends. The spire is 
perfectly immersed, the posterior edge of the whorls rounded, but sloping towards 
the interior; the surface is very minutely spirally striated; the aperture slightly 
_curved, posteriorly narrow, anteriorly somewhat broader, deeply indented at the 
termination of the columella, the inner lip being here somewhat thickened, but not 
very conspicuously twisted; there is a narrow but distinct fissure present. 
Locality —Comarapolliam, in a soft, light coloured sandstone; apparently 
very rare. 
Formation.—Arrvialoor group. 
LX. Family,—-OXYNOEIDZZ. 
LOPHOCERCID# and IcARID#, auctorum, 
The animals of the Oxrworzp# are distinguished by having the foot laterally 
expanded into lappets or wings, which either partially envelope the shell when the 
* Meek in his quotations of species of Acteonella also mentions A. syrica, Con., which, according to the 
figure given by Fraas, is a Trochacteon. 
