44 Records of the Geological Surrey of India. [vol. x. 
seen as is met with in living examples of one species. I propose to briefly characterise it 
under the name of 
Bellia Sivalensis, n. sp. 
Testa depressa quadrate ovata, margine simplici, carind vertebrali mild. Nuebali 
nullo vertebrali primo quinque-laterale antice obtuse angulate, laterilvs concavis. 
'Vertebrali secundo sex-laterali boleti-formi, antice et postice recto, lateribus antice 
rotundis, postice, valde concavis. Vertebrali tertio, secundo simili .— Costale primo, magno 
et medium quinti marginalis attingente. Gularium angulo valde acuto. Suturapectoral* 
cum post gularibus, fere recto. 
Shell oblong ovate, depressed, very flat along the vertebral region and without the trace 
of a keel, sides shelving, margins simple. Nuchal, none. First vertebral five-sided, with an 
obtuse angle in front. Anterior sides straight (26 mills), lateral concave (39 mills), base 
sinuated (26 mills), each vertebral being slightly notched posteriorly to receive a corresponding 
median prominence in the one following it. Second and third vertebrals equal and similar 
mushroom-shaped and six-sided. Front and base equal (27 mills). Anterior sides convex, 
posterior concave. The first costal large, reaching to the centre of the fifth marginal:— 
Mills. 
1st Vertebral; greatest width ... 
... 42 
„ sides 
... 39 
„ base 
... 26 
„ long 
... 50 
2nd and 3rd Veitebral; greatest width ... 
... 50 
„ base 
... 26 
„ long 
39 
1st Costal; greatest diameter 
... 72 
„ posterior side 
... 65 
Gular ; broad 
.. 22 
„ long 
... 36 
Gular and post gular 
... 
... 42 
Marginals sub-equal, the first being the largest. 
When perfect the shell must have been close on nine inches long and six broad. 
The most obvious characters of this species are the great flatness of the top of the 
shell, the complete absence of any vertebral keel or nodosity, and the peculiar mushroom- 
shaped vertebrals. These plates very closely resemble Bellia crassicollis, Gray; a species 
which at present is not known to range north of Tenasserim, hut that has a small nuchal 
plate which is certainly absent in the fossil. Still, however, the two are very similar-, the 
fossil being rather larger than any living specimen of B. crasicollis that I have seen. 
The geological horizon of the species is a very high one, the fossils having been 
obtained from a thick series of clays and sands overlying the great gray sandstone series 
with conglomerates (locally known on the Survey as the 1 Dungote sandstones'), and whieh 
clays in fact constitute the highest beds of the Siwaliks in the Punjab. Associated with 
Bellia sivalensis are a great variety of fossils, among which it will suffice to specify 
Colossochelys, Sivatherium, JEquus sivalensis, IJippotlierium, and Camelus. These beds 
