22 CRETACEOUS GASTROPODA 
isolated tubercles or granule. On the anterior and much thinner portion of the 
last whorl, which is produced into the canal, the surface is usually so much covered 
with the callosity, that it appears quite, or to a great extent, smooth. 
It would not be easy to find two forms, which remind one more of merely 
sexual differences, than the Pug. contortus and granuliferus and still, if the differ- 
ences are so remarkable and constant, we cannot do else, than distinguish them by 
specific names. In the description of the former species, I have remarked, that on 
the first whorls spiral striation or suleation is quite distinctly traceable, and that it 
becomes more or less obsolete on the following and especially on the last whorl; 
in all cases, itis at least indicated: if we wanted to go alittle further, we could justly 
say, it is merely exaggerated in some abnormal specimens, which are here noticed 
under P. granuliferus. Quoy and Gaimard, Soutelet and several other conchologists 
have noticed, that the female shells of Mollusca exceed those of the male sex very 
often in size, being usually more inflated or ventricose. It appears to me more 
likely, that we have to deal here with such a difference of forms, rather than with 
two animals actually different as regard species. 
For imperfect specimens the reader is referred to the explanation of Figs. 6 and 
(tall, ILI 
Localities. Kolakonuttom, Andoor, N. and 8. of Serdamungalum, 8. E. of 
Anapaudy, in the Trichinopoly group; W. of Ilpagoody, Shillpagoody and 
Veraghoor, in the Arrialoor group. In all these localities of the Trichinopoly 
district Pug. granuliferus is not very common and comparatively much rarer than 
Pug. contortus, of which about eight specimens occur to one of the former. The 
quotation of the Arrialoor group is probably not so very important, the localities 
being chiefly near the boundary of these two groups, and on the other hand Mr. 
Blanford himself states, that their separation is, in the southern portion of the 
Trichinopoly district, generally uncertain. 
Formation. Trichinopoly and Arrialoor groups. 
ae 
3. PUGNELLUS UNCATUS, Porbes, sp. Pl. III, Figs. 9—183. 
1846. Strombus uncatus, Forbes in Trans. Geol. Soc. Lond. VII., p. 129, Pl. 15, Fig. 16. 
1847. Strombus semicostatus, D’Orbigny, Voy. Astrolabe et Zelée, Paleont. Pl. 2, Fig. 38. 
1850. Colombellina uncata, D’Orbigny, Prod. II, p. 231. 
1860. Strombus weatus (Forb.) Conrad, Journ. Acad. Nat. Sc. Phil. IV. p. 284 (vide Pugnellus). 
1861. Pugnellus uncatus, Forb. sp. Gabb, in Proc. Am. Philo. Soc. VIII. p. 128. 
1864. Colwmbellina uncata (D’Orb.) Pictet, Mat. p. 1. Paleont. Suisse, Foss. Ste. Croix. 3me. ser. p. 67. 
Pug. testa ovate-ventricosa, antice atque postice attenuata, spira quartam partem 
totius altitudinis teste elevata, angulo 65°—75° ; anfractibus quinis vel senis, convexis, 
sutura impressa junctis, prioribus spiraliter dense-striatis, striis in ultimo anfractu 
obsoletis ; ultimo anfractu transversaliter costato : costis flexuosis, antice evanescentibus. 
Apertura angustata, ovali, postice sub-rotundata, antice acuta, intus levigata, callosa ; 
labro incrassato, in alam brevem atque rotundatam seu angulatam postice extenso, 
extus lamelloso, parum reflexo, intus levi, antice atque postice insinuato ; labio crasso, 
calloso, in etate adulta infra atque lateraliter spiram incrustante ; rostro extus contorto, 
acute terminanti, incurvo, intus canaliculato, callositate marginal tenw iastructo. 
