OF SOUTHERN INDIA. 265 
2. Lirrortna crassrresta, Stoliczka, Pl. XX, Figs. 16-17. 
Tntt. testa ovata, crassa, apice acuminata; anfractibus planiusculis, swperiori- 
bus transversaliter oblique-costulatis, omnimis postice ad marginem suturalem valde 
tumescentibus atque tuberculis rotundatis ornatis, duobus ultimis antice fere levigatis ; 
striis incrementi infra marginem tumescentem valde imsinuatis; ultimo anfractu 
subinflato, ad peripheriam convexo ; basi producta, spiraliter obsolete late-sulcata ; 
apertura ovali, postice acuminata, antice rotundata ; labio crasso levigatoque ; labro 
postice insinuato. 
Spiral angle about 50°; sutural angle 6°- 8°. 
Height of aperture : totalof shell ... (considered as 1:00) ... ro ODO: 
Width of penultimate whorl : its height ( A taste) tees aon) PROD: 
This is an ovate, strongly built shell with an acute apex, and the last volution 
somewhat inflated. The uppermost whorls are transversally ribbed, contracted 
posteriorly and angular near the middle. The succeeding whorls are flattened, 
smooth, posteriorly inflated along the suture, and provided with numerous rounded 
tubercles, which often become less marked, when they approach the aperture. 
The striz of growth are strongly insinuated below the inflated posterior margin. 
The basis is produced and spirally sulcated, the sulci being, however, occasionally 
rather obsolete. The aperture is oval, posteriorly pointed and anteriorly rounded ; 
the inner lip thickened and smooth ; the outer attenuated and posteriorly more 
or less deeply insinuated. This strong insinuation of the outer lip is something 
unusual in Littorina, but, as I have already stated, there are such small differ- 
ences in the degrees of this emargination, that it is impossible to use it as a 
generic distinction. With regard to the great thickness of the shell of Litt. 
crassitesta, I do not know any other species that could be better compared with it, 
than the Tanalia acinosa, Zek. sp. (olim 7. Pichleri, Horn., sp. Stoliczka, in Sitz. 
Akad., Wien, 1865, Vol. LII, Revision, etc., p. 56) from the Alpine-Gosau formation. 
Locality.—Comarapolliam ; not rare. 
Formation.—Arrialoor group. 
3. LirrorRIna INconstans, Stoliczka, Pl. XX, Figs. 13-15. 
Intt. testa ovata, apice acuminata ; anfractibus convexis, postice valde contractis, 
sulcatis, im margine suturali tumescentibus, spiraliter multi-sulcatis, transversaliter 
striis imerementi minutissimis ornatis ; basi convexa, similariter spiraliter sulcata ; 
apertura ovata, postice acuta ac angustata; antice rotundata. 
Spiral angle 57°; sutural angle 8°- 5°. 
Height of the aperture : total of shell .., (considered as 1:00) ae WAP 
Width of penultimate whorl : its height... ( es Sp) -- 2°00. 
This species very much resembles in form and ornamentation the recent 
Litt. tessellata, Phil. from the West Indies. It is ovate, with a short pointed apex, 
the whorls having the posterior margin thickened into a distinct keel, below which 
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