266 CRETACEOUS GASTROPODA 
they are constricted or grooved, and then uniformly enlarging till they again 
become slightly narrowed at the anterior suture. The entire surface is covered with 
numerous, close, spiral sulci, and the strive of growth often produce a very fine 
erenulation on the ribbings which separate the furrows. The aperture is oval, 
anteriorly evenly rounded, posteriorly much narrower, and on the outer lip 
slightly insinuated. If we are correct in referring the specimen, represented in 
Figure 15 to this species, it would seem that on farther growth the sutural 
swelling becomes respectively stronger, but that the spiral sulcation nearly disap- 
pears. This large specimen, which does not otherwise exhibit any distinction in 
the form of the whorls, has been found in brownish sandstone near Olapaudy, 
the beds of which locality Mr. H. Blanford refers to the Arrialoor group. 
Localities —Kolakonuttom, N. of Alundanapooram, S-E. of Parchairy, in 
brownish or light coloured sandstone; only one specimen from each locality has 
been examined, 
Formation.—Trichinopoly group. 
4. LaATToRINA ACICULARIS, Stoliczha, Pl. XX, Figs. 9-10. 
Litt. testa elongata, apice acuminata, ultimo anfractu sub-inflato, im junioribus 
speciminibus ad peripheriam subangulato ; ceteris anfractibus planiusculis sew subcon- 
vexis, sutura impressa junctis, in superficie spiraliter multi-liratis : liris planis, sulcis 
angustioribus separatis, in medio anfractuum aliquanto subobsoletis ; basi subplana, 
moderate producta; apertura late ovata, postice acuta, antice subrotundata ; labio 
angulato. 
Spiral angle 50°; sutural angle 15°. 
Height of aperture : total of shell ... (consideredas 1-00) .., we O47, 
Width of penultimate whorl : its height ( 3 wah kesh) anes .. 2°10—2:36. 
The spire in this species is considerably produced and pointed. The whorls are 
flattened or slightly convex, each of them provided with six or seven very narrow 
spiral sulci, which are separated by much broader, flat ridges. The last whorl 
is obtusely angulated at the periphery; the basis not much produced, and also 
spirally sulcated ; the ridges being broadest at the periphery, and becoming gradually 
narrower towards the centre. The aperture is rather wide, posteriorly pointed, 
anteriorly broadly rounded; the inner lip angular; the outer lip arcuated, without 
any perceptible insinuation. There is in the young shell a slight fissure at the 
termination of the columella, but it disappears in advanced age. 
Several recent species, like Litt. Sieboldii, Phil., Litt. scabra, Linn., and others 
from the eastern seas, are almost identical in form with our cretaceous shell. 
Young specimens, which have the whorls somewhat more convex, resemble the 
Tntt. Roissyi, d’Arch. (Mem. Soc. Géol. France, 2me. Ser., Vol. IT, p. 337, pl. 23, 
fig. 3) from the Tourtia beds. 
Localities —K. of Anapaudy, N. of Alundanapooram, and near Garudamun- 
galum; only four specimens have as yet been procured. 
Formation.—Trichinopoly group. 
