PAKT 4 .] 
Waagen : Ammonite-fauna of Kutch. 
89 
oolite with much iron, and the Ammonite-fauna of both places is so very closely allied that 
it will not be necessary to quote the species separately. 
(5). Ammonites of the “ Brown oolite” 
Phylloceras disputahile, Zitt. 
„ Lodaieme, Waagen. 
Peltoceras aegoceroides, Waagen. 
„ Arduennense, Orb. 
„ semirugosum, Waagen. 
„ lidens, Waagen. 
„ perarmatum, Sow. 
Stephanoceras macrocephalum, Sehloth. 
Lodai and the Jooria hills — 
Stephanoceras Polyphemus, Waagen. 
„ elephanlinum, Sow. 
„ arenosum, Waagen. 
„ eucyelum, Waagen. 
„ fissum, Sow. 
Perisphinctes Dlwsaensis, Waagen. 
„ Indogermanus, Waagen. 
„ Jooriemis, Waagen. 
Of Pkyll. disputahile I have already mentioned the geological position; among the 
other species in the list it may seem a little strange to find together, apparently in the 
same layer, SI. macrocephalum and Pelt, perarmatum. The discrepancy may be explained in 
two ways. Either there exist in Lodai and Jooria two layers of very similar lithological 
aspect, but of different age, or St. macrocephalum had in India a greater vertical distribu¬ 
tion than in Europe, that is, the species passes in India from lower into higher strata, 
during the deposition of the latter of which it was already extinct in Europe. The latter 
explanation seems to me the more plausible one, because there occurs also in another locality, 
at Kuntkote, a species of the Macrocephali, (St. Maya , Sow.,) which is so closely allied to 
St. macrocephalum, that it is hardly possible to distinguish them specifically, and also because 
in Kutch the Macrocephali group in general seems to continue, in a great variety of forms, into 
higher beds than is the case in Europe. Under these circumstances, we may, therefore, con¬ 
sider as the most valuable species for determining the age of the strata above noticed the species 
of the Peltoceras, which in Europe are highly characteristic for lower and middle Oxfordian., 
The most important species are Peltoc. Arduennense and perarmatum, and next to these 
Per. Indogermanus, which is very common in the “zone of Am. cordatus” of the “Vaches 
noires.” 
The brown oolite has, in common with the oolite of Dhosa, Steph. opis and fissum, 
whilst on the Keera hill we again find St. eucyelum in an indurated yellow limestone, 
together with Per. euryptychus, Neum., which possibly could represent the brown oolite in 
that place. 
The locality west of Soorka. hill ha.s furnished only two species of Ammonites— 
Perisphinctes frequents, Opp., and 
„ denseplicaius, Waagen, 
associated with pthynch. (Hemithyris) myriaeantha, Desl., in a brown oolite, very much like 
that of Lodai. 
The next locality of considerable geological interest is that of Kuntkote, because 
Sowerby has described from there several species, and among them Per. calvus, which 
was most probably wrongly identified with one occurring in Europe; but unfortunately 
no specimen of true A. calvus, Sow., is found among our materials. The rock of Kunt¬ 
kote is dark-red, fine sandy, ferruginous, much impregnated with salt and gypsum. The 
species are— 
(6). Ammonites of the red ferruginous rock of Kuntkote : 
Peltoceras cf. perarmatum. Sow. (possibly Pelt. Oegir, Opp.) 
Stephanoceras Maya, Sow. 
„ * fissum. Sow. 
„ Nepalense, Grav. 
