96 CRETACEOUS GASTROPODA 
strize appear more strongly marked. The aperture is narrow, pointed posteriorly and 
broadly emarginated anteriorly ; the canal is rather long and bent to the left side (in 
front view) and somewhat upwards. ‘The inner lip exposes on the margin two oblique 
plaits only, posteriorly it seems to be so thin that the granular structure of the underly- 
ing surface appears quite distinct, although some smaller posterior plaits were pro- 
bably present. It is even possible that a third thinner plait exists between the two 
stronger ones. The peculiar bending of the canal leaves the determination of this 
species as a Volutilithes uncertain. There are several species (V. lima and limopsis) 
in Europe and North America, which in form and structure of the shell exhibit 
scarcely any difference from this. Of cretaceous it will be necessary to compare 
with our Indian fossil well preserved specimens of V. fenestrata, Zek. from the 
Alpine Gosau-formation (vide Abhandlg. der geol. Reichs-Anstalt, Wien, I, p. 73, 
f. 13, Fig. 6, and Sitzungsb. Akad. Wien. Vol. LIL. Revision &e. p. 71). 
Locality —From a blueish and white sandstone near Kullygoody in Trichinopoly 
district. several specimens have been obtained. Forbes states the loc. Pondicherry 
and notes it as apparently abundant. One specimen from the Madras Museum 
marked with the same locality agrees in mineralogical character fully with the 
Kullygoody sandstone. It is probable, however, that the Kullygoody beds are 
represented near Pondicherry, classed by Blanford in the uppermost group, and 
that these beds have to be referred rather to the Arrialoor than to the Trichinopoly- 
group, if on other grounds the distinction between those two groups is either possible 
and necessary. 
Formation.—Trichinopoly group, (?)—according to Mr. Blanford’s map. 
XIX. LYRIA, Gray, 1847. 
(Vide Adams’ Genera I, p. 166, II, p. 616; Chenu’s Manual I, p. 190; Crosse in Journal de ser. 
3, Vol, VI., p. 105.) 
The genus Lyria was first established by Gray for those Mitra-like Volute 
which have a large number of columellar plaits, the two anterior of these beg the 
strongest, and the posterior portion of the inner lip provided with a large number 
of short cross-plaits or folds. It is a very marked and characteristic genus, which 
next to Volutilithes has the most numerous representatives in eocene rocks; cre- 
taceous species are as yet scarcely known, at least there is a great difficulty in 
attributing any of those which have been described, to it. 
Gray has distinguished, besides Zyria (proper), a sub-genus Harpella and 
accepted Eneta. Harpella ought to differ in having numerous small grooves on the 
inner lip. The fact appears to be that the interstitize of the short posterior plaits are 
somewhat broader in Lyr. (Harpella) costata, Swains, (lyrata Humph.), than usual, the 
plaits themselves being somewhat obsolete. The Lyr. Delessertiana, Petit, has this 
character not nearly so distinct, and it is in fact scarcely possible to give any other 
generic distinction from Lyr. mitreformis, Lam. The genus Lyria, as stated by Messrs. 
Adams in their ‘ Genera’ ought, we believe, to be retained. The distinction of Eneta, 
Adams, would appear more desirable, the respective species being besides characterized 
