152 Additional fragments of the Sivatherium. [Feb. 



truncated shells. The terminal volute of Carinuria is also liable to 

 decadence, but nc perforation is visible in the injured part. 



I think that the preceding observations will tend to uphold the 

 claim of Balanlium to rank as one of the prominent types of form, 

 which, for convenience' sake, are termed genera, and that it is de- 

 sirable that the anonymous institutor of it should claim his proper- 

 ty, in order that we may know to whom we should rightly attribute 

 its first indication. 



The other species noticed in the Journal of Science, as preserved in 

 the British Museum, would appear, from the figure referred to in Par- 

 kinson's Introduction, to be a Cleodora which we met in a tract of the 

 Indian Ocean contained between the parallels of 30° south and 3* 

 north, and the meridians 86° and 92° east ; but Parkinson's figure 

 does no justice to the form of that truly elegant and delicate shell. 



XI. — Additional fragments of the Sivatherium. 



Before Colonel Colvin's departure for Europe, we requested permis- 

 sion to take a cast of the beautifully preserved lower jaw of the Sivathe- 

 rium which he exhibited at the Government House scientific party in 

 January last. In further token of his zeal for science, and of his ever- 

 readiness to oblige, he has, even in the hurry of embarkation, favored us 

 with the accompanying lithographic drawings of the same jaw, and of 

 the larger fragment of the occiput also on its way to adorn some ca- 

 binet of fossil osteology in his native land. This fragment is the more 

 valuable on account of its being perfect in the parts deficient in Dr. 

 Falconer's specimen published in the Asiatic Researches, vol. xix.* 

 We subjoin the Colonel's note explanatory of the drawings, (Plates 

 VIII. IX.) 



" I herewith send you two plates of the Sivatherium, one of the por- 

 tion of the head 1 was fortunate in having brought in from the lower 

 hills below and west of Ndhan just before I left Ddddpur. It arrived 

 encumbered with a good deal of hard sandstone matrix, most of which 

 1 had cleared away. This specimen is valuable, though it has no 

 teeth, from having the occiput very entire, and from its proving the 

 accuracv of Dr. Falconer's assumption, founded on examination of 

 the original head, that the animal had four horns with bony cores, as 

 this has the offset of one of the back branched horns very clearly 

 marked; suitable to which I may mention that Captain Cautley 

 has found in his collection a large flat horn. In this Plate, fig. 1 

 * See Journal Asiatic Society, vol. v. January. 



