300 CRETACEOUS GASTROPODA 
This species differs from Amaurop. alveata, Con. (Gabb in Pal. Calif., 1864, I, 
p. 110, pl. 19, fig. 59, and pl. 21, fig. 111,) by its more slender form, and posteriorly 
less broadly flattened volutions. 
Localities—Near Karapaudy, N. E. of Andoor, E. of Anapaudy ; not common. 
Formation.—Arrialoor — and Trichinopoly — groups; to the former only the first 
named locality refers, but the species is here more common than at the two others. 
LXV. AMPULLINA, Lamarck, 1813. 
1. AMPULLINA BULBIFORMIS, Sowerby, sp. Pl. XXI, Figs. 11-15. 
1836. Natica bulbiformis, Sow., Trans. Geol. Soc., Lond., III, p. 418, Pl. XX XVIII, Fig. 13. 
1865. Ampullina id. ... , Stoliczka,in Sitz. Akad., Wien, LII, Revision, ete., p. 43,—with references 
to previous publications on the European forms. 
Amp. testa ovata, spira plus minusve elevata; anfractibus subconvexis, 
aliquantisper in speciminibus adultis paulo concavis, postice ad suturam truncatis 
seu canaliculatis, ultimo ad medium convexo aut subangulato aut gibboso, interdum- 
que cylindraceo; superficie semper striis incrementi minutis notata, in junioribus 
spiraliter punctata, aliquantisper sulcis distantibus spiralibus, subobsoletis tecta ; 
apertura ovali, antice rotundata, postice acwininata, labio crassissimo, fissuram 
columellarem sepissime tegente. 
e pe Spiral angle varying from 65°-105°; sutural angle 5°- 6°. 
Height of aperture : total of shell (considered as 1:00) ... 0°60-0°80. 
f have already in my Revision of the Alpine Gosau-Gastropoda referred to 
the very considerable variations, to which this species is subject with regard to 
the height of the spire; this being in some specimens more, in others much 
less elevated. The principal characters distinguishing it are, the broad posterior 
fattening or canaliculation of the whorls and the very great thickness of the 
inner lip. Well preserved and fully grown specimens do not even, in conse- 
quence of the callosity of the inner lip, show any fissure at the termination of the 
columella, it being only occasionally traceable in those specimens, which have the last 
volution strongly inflated. The same specimens also usually have the posterior edge 
of the whorls more distinctly canaliculated, while others have it only flattened. The 
strie of growth are always distinct; but the punctuation which is arranged in 
distant, spiral lines, is generally only clearly traceable in the smaller specimens, 
though not always altogether wanting in the large ones. Sometimes specimens 
are found which exhibit, on the surface of the last volution, more or less regular 
and distant spiral ridges. 
Localities—Near Kolakonuttom and Moraviatoor, (Oot. gp.); Alundana- 
pooram, Garudamungalum, Anapaudy, Andoor, ete., (Trich. gp.); near Comara- 
polliam, (Arrial. gp.). At all the localities, except the last one, the species is very 
common, especially in the Ootatoor beds near Kolakonuttom (vide Mem. Geol. 
Surv., Vol. IV, pt. I, p. 88, etc.), wherefrom it is quoted by Mr. H. Blanford under 
the name of NV. pagoda, Forbes; it is to be met with not less common in the Tri- 
chinopoly beds near Anapaudy and Garudamungalum. 
