1862.] DE KONINCK INDIAN FOSSILS. 13 



must have been from eighteen to twenty. The lateral lobes are three 

 in number, and are similar in shape ; their denticulations are rela- 

 tively small, and number five or six. The whorls of the spire slightly 

 overlap each other. 



The total diameter must have been about 12 centimetres in the 

 specimen figured, that of the umbilicus 4 centimetres. The height 

 of the last whorl is 5 centimetres. 



32. Ceeatites latifimbeiatus, De Kon. PL VII. fig. 2. 



Shell discoidal, with a strongly rounded back, and remarkable 

 from the form of the denticulations of its lobes ; these are generally 

 four in number ; but in examining them with a lens one distin- 

 guishes on their edges other supplementary indentations, which 

 make each joint resemble a little tooth of Carcharias. The coils of 

 the spire overlap each other from about two-fifths of their height. 

 The surface is entirely smooth. Besides the dorsal lobe (of which I 

 have not been able to completely observe the shape, on account of 

 the bad state of preservation of this portion of the specimen), it pos- 

 sesses three other sufficiently deep lobes, all of about the same shape. 

 The corresponding saddles are rounded, and have their sides almost 

 parallel between the lobes. It is easily distinguishable from C. Law- 

 rencianus by the absence of the auxiliary lobes. The number of the 

 chambers must have been fifteen or sixteen for each whorl of the 

 spire. The diameter of the shell is from 9 to 10 centimetres, that of 

 the umbilicus is 2| centimetres, and the greatest thickness of the 

 shell is 3 centimetres. From the Productus-limestone of Vurcha. 



33. Ceeatites Bttchtantts, De Kon. PI. VI. fig. 4. 



This species is so nearly related to the succeeding one that I 

 should have willingly dispensed with it, had not its umbilicus 

 been proportionally much larger; the spiral whorls, also, overlap 

 each other only to the extent of about one -third, while in C. David- 

 sonianus they commence to overlap each other at three-fifths of their 

 height. Besides this, the surface is ornamented with a tolerably large 

 number of well-marked, radiating undulations, a character not seen 

 in that species. The shape of the chambers is a little different, 

 and the sinuosities of its lobes and saddles less deep than those 

 observed in C. Davidsonianus. The diameter of the largest of the 

 three specimens that have come under my notice is 5| centimetres, 

 that of the umbilicus is one-third as much. Prom the Productus- 

 limestone of Vurcha and Kaffir Kote. 



34. Ceeatites Davidsonianus, De Kon. PI. VI. fig. 2. 



This species has much affinity to the one following, but differs in 

 its size, as well as in the shape of its chambers. It is discoid, and 

 possesses but a small umbilicus. Its surface is smooth, and the 

 terminal chamber very large, occupying about one-half the last whorl 

 of the spire. Its lobes and saddles are analogous to those of C. Law- 

 rencianus, but the former are much less deep, and the saddles much 



