1862.] BE KONINCK INDIAN FOSSILS, 3 



IV. PISCES. 



42. Acrodus, n. sp., closely related to i 43. Acrodus Flemingianus, De Kon. 

 A. lateralis, Ag. | 44. Saurichthys ? Inddcus, De Kon. 



All the fossils sent are from the western end of the Punjaub 

 Salt-range, and from its prolongation down the right bank of the 

 Indus, as far as Kaffir Kote, which is a rich locality for most of the 

 fossils. 



1. ISASTRJSA ARACHN01DEA, De Ken. PL II. fig. 2. 



This coral is in subgibbous masses, whose snbequal calyces are of 

 a polygonal shape, but more often hexagonal, of small depth, and 

 terminated by obtuse mural edges : the rays, to the number of from 

 58-30, are crenulated on their edges, all departing from the centre 

 of the calyx and radiating towards the margins, where they become 

 slightly thickened. 



It will be interesting to determine by new observations whether 

 this species really occurs in strata of the Carboniferous period, 

 because the genus to which it belongs has not been hitherto dis- 

 covered lower than the Muschelkalk. 



2. Clisiophtllttm Indictjm, De Kon. PI. II. fig. 4. 



The shape of this coral is that of a very elongated cone, showing 

 frequent, but slightly marked concentric interruptions, or rugae of 

 growth.. 



The vertical ridges or partitions are very thin, and number about 

 300 all round the circumference. Examined with the lens, one 

 perceives in the interseptal cells very thin and numerous partitions, 

 which are marked exteriorly by very fine longitudinal striae. The 

 floors of the chambers are numerous, and smooth in their central 

 portions. The oval shape of the transverse section of the specimen 

 which I have just described appears to depend on a kind of acci- 

 dental malformation. The diameter is about 6 centimetres. The 

 large number of partitions with which this species is furnished 

 allows of its being distinguished without difficulty from all its con- 

 geners. 



3. Lithostrotion basaltiforme, W. D. Conybeare and "W. Phillips, 



Outlines of Geol. of England and Wales, 1822, p. 259. 



Notwithstanding that the Indian specimen consists only of a sili- 

 ceous cast, in a very indifferent state of preservation, I do not 

 think that I can be mistaken in identifying it with the English 

 species just mentioned. 



4. Lithostrotion irregtjlare, Phill. Greol. of Yorkshire, 1836, vol. iL 



p. 202, pi. 2. figs. 14 & 15. 



This species is represented by a specimen identical in its characters 

 with those found in the Carboniferous Limestone of Yorkshire. The 

 diameter of the calyces is from 14 to 16 millimetres. 



b2 



