PART 4.] 
Waagen: Ammonite-fauna of Kutcli. 
97 
The group is typified by Per. polyplocus, Rein. This latter species is known in Europe 
to be very characteristic for the Kimmeridgian, and not alone that, but the whole group 
is restricted to a similar horizon. It is doubtful whether in India the geological position is 
exactly the same, but nevertheless Per. leioaymon deserves particular notice. 
Perisphinctes leiocymon , Waagen, n. sp. Closely allied to Per. polyplocus, Rein., but 
with much fainter ribs and of by far larger dimensions; only the ribs are near the umbi¬ 
lical margin somewhat more strongly marked. The species shows also by its rounded ribs 
some slight resemblance to Per. albienus, Opp., and thus the Indian species may be said 
to represent a connecting link between the section of Per. Martiusi and the Polyploci 
group. 
The last section of Perisphinctes is that of Per. Pehmanni, Opp. The species belong¬ 
ing to it usually possess spiny whorls and a flat band along the middle of the siphonal side. 
Though I think the section originates with Per. sulcatm, Hekl., I quote as the first species 
Per. Pehmanni, because the geological relations between those two species have not as yet 
been established. The Indian species belonging to the section are : 
Perisphinctes Pehmanni, Opp. (golden oolite, Keera hill). 
„ anceps, Rein, (iron nodules, Keera hill; oolite, Dhosa). 
„ arthriticus, Sow. (iron nodules, Keera hill). 
„ Jooriensis, Waagen, n. sp. (brown oolite, Jooria hills). 
Perisphinctes Jooriensis, Waagen, n. sp. Allied to Per. Balderas, Opp., hut more 
evolute, with less numerous contractions on the whorls and sharper and more regular ribs. 
The 73 species above enumerated have been determined and described from the mate¬ 
rials in our Museum with sufficient certainty. Several forms I was obliged to put aside, 
partly because the materials were in bad preservation, and partly because there was not a 
sufficient number of specimens existing, in order to point out the exact relations or distinc¬ 
tions of the species; this is particularly the case among the Perisphinctes. 
The oldest known locality where Ammonites occur, and at the same time the richest 
in forms, is the Keera hill near Charee, and the mineralogical differences of the rocks in 
which different species are preserved clearly indicate that there must he several distinct 
groups of middle and upper jurassic strata exposed. This variety of the rocks'cannot be 
accidental, as is, for instance, shown by St. tumidum or Per. funatus, which never occur 
in an iron nodule, while Per. arthriticus has never been found in the golden oolite. Of the 
different beds in this locality, containing different Ammonite-faunas, I can at present point 
out two, each with a sufficiently large number of species, the golden oolite and the bed with 
iron nodules ; all the other strata are represented only by a few species:— 
(1.) Ammonites of the Golden Oolite of Keera hill near Charee: 
Phylloceras disputahile , Zitt. 
„ Zignodianum, Orb. 
Pytoceras Adelaides, Kud. 
Oppelia subcostaria, Opp. 
PLarpoeeras hecticum, Rein. 
Stephanoceras macrocephalum, Schloth. 
„ tumidum, Rein. 
„ Polyphemus, Waagen. 
„ lamellosum, Sow. 
„ Chareeense, Waagen. 
Stephanoceras Grantanum, Opp. 
„ dimerum, Waagen. 
„ subtrapezinum, Waagen. 
„ diadematum, Waagen. 
Perisphinctes spirorbis, Neiim. 
„ bracteatus, Neum. 
„ funatus, Opp. 
„ paramorphus, Waagen, 
„ arcicosta, Waagen. 
„ Pehmanni, Opp. 
