211 
The genus Perisphinctes is represented in the Kacch Jura 
(Kutch) * by more than fifty-six species, which can be distributed, 
according to Dr. W. Waaaen, into six large sections, most of 
which comprise several groups embedded in strata, that find 
their equivalents in the Middle and Upper Jurassic rocks of 
Europe, between the Kelloway, Oxford, Corallian, Kimmeridgian, 
and Portlandian stages. 
Genus OxcostepHanus, Newm.—This genus was erected to 
receive a certain number of species that were formerly grouped 
with the preceding, but which are now separated from Peri- 
sphinctes. The type of this group is Olcos. Cautleyii, Opr., from 
the Indian Jura. Olcostephanus, in contrast with Perisphinctes, 
consists in a shorter body-chamber, two thirds of a whorl in 
length. Mouth-border in some has a simple smooth band, 
and in others lateral auricles are developed. The ribs project 
broadly from the border of the umbilicus, and separate on the 
sides into many smaller branches. 
Genus Scapuites, Park.—Shell spiral, rolled on the same 
plane. Whorls at first contiguous and united, then separated 
from the others and projected outwards in nearly a straight 
Fie. 71.—Scaphites Ivanz, Puzos. 
line, afterwards turned upwards, bent round, and curved inwards, 
forming a kind of horse-shoe shape. The septa transverse, 
symmetrically divided regularly into more than six very unequal- 
sized lobes, invariably composed of short bilateral ramifications; 
the saddles formed of pairs of cells. The siphonal lobe is as 
* “ Paleeontologia Indica,” “ Jurassic Fauna of Kutch,” p. 143. 
