34 Records of the Geological Survey of India. [vol. i. 
almost obsolete oil the inner one. Our fossil perfectly agrees with Geinitz’s original 
specimens in the Museum at Dresden. 
Ammonites subobtectits, StoliczJca, Ceph. loc. cit., p. 96. 
In Sharpe's collection, presented to the London Geological Society, there are one large 
specimen and three fragments of Am. obtectus. The row of tubercles in the middle of the 
hack is distinctly traceable, though it sometimes appears to become obsolete ; the transverse 
ribs are present in the same number as the lateral ones; the distinction mentioned (loc. cit., 
p. 97) as existing between the European and the Indian fossils must, therefore, be retained. 
Ammonites Cunliffei, Forbes, Ceph. loc. cit., p. 97, is a Scaphites, and will be noticed 
subsequently. 
Ammonites Pavana, Forbes. 
18-10. Ammonite* Havana, Forbes, Trans. Geol. Soc., Fond., VII, p. 110, PI. VII, Fig. 5. 
Amm. testa compressa, lateraliter applanata, moderate umbilicata, costis flexuosis 
prope margimm dorsalem sub-tuberculatis, longioribm et brevioribus alternantibus, 
ornata ; dorso obtuso, paullulum rotundato et lateraliter compressiusculo. 
Height of outer whorl : the whole (considered as l'OO) ... 0'60. 
Width of umhilicuB : ditto ... ( „ „ „ ) .0'29. 
Thickness of whorl : its height ( „ „ „ ) ... 0'43. 
Prof. Forbes’ original specimen, though not very perfect, appears to he distinct from all 
other Ammonites, as yet known from the South Indian cretaceous deposits. It has the 
appearance of a young Seaphites ; but for this the shell is too regularly coiled, and besides 
most of the species of that genus have the ribs at the back generally recurved, not bent 
(or at least not so strongly) anteriorly. The lateral ribs are in Am. Pavana strongly 
flexuous, double curved, becoming gradually thicker towards the edge of the back, where 
they are provided with small tubercles; obsoletely continuing across the back, which is 
obtusely rounded; each long rib alternates with one or two shorter ones. 
The specimen appears to he from the Arrialoor sandstone near Pondicherry. 
Ammonites Ganesa, Forbes, Ceph. loc. cit-., p. 106. 
Amm. Soma, Forbes (Trans. Geol. Soc., London, 1846, VII, p. 102, pi. VII, fig. 7) 
must he considered as a synonym of the above species, the name having been proposed for 
a young specimen of the same. Forbes’ remark on the tablet of the original specimen in 
the London Geological Society’s collection was already to that effect. 
Ammonites Indba, Forbes, Ceph. loc. cit, p. 112. 
Amm. Garuda, Forbes (Ceph. loc. cit., p. 149, pi. 74, fig. 5) is, remarkably enough, only 
a young specimen of the above. There are three specimens of this species in the London 
Geological Society’s collection; all show the furrows on the back. The young shell has 
really a very different aspect from the old one, inasmuch as the whorls begin to increase 
very rapidly in width as soon as the specimen has attained a certain size. The specimen 
figured as A. Garuda has a markedly large umbilicus. The outlines of the septa are quite 
the same as those of Am. Indra. 
Ammonites Velled.e, Miclielin, Ceph. loc. cit., p. 116. 
Amm. Nera, Forbes (loc. cit., p. 106, pi. 8, fig. 7) is only a young specimen of the above 
European species. 
Ammonites Kolotueensis, Sloliczka, Ceph. loc. cit., p. 127. 
Amm. ? indicus, Forbes (loc. cit., p. 114, pi. 8, fig. 9) may be a fragment of a whorl of 
the above species, but the original is so much mutilated that it is impossible to form any 
decisive opinion. The fragment is valueless in point of identification. 
Ammonites diphtlloides, Forbes, Ceph. loc. cit., p. 119. 
The specimen described by me, loc. cit., p. 120, pi. 59, fig. 12, under the name of 
Amm. Yama, Forbes, is identical with the above species. It has the shell partially preserved, 
and the transverse furrows consequently not traceable; the difference then pointed, out as 
existing between the division of the sutures was due to the small diameter in which the 
sutures were observed on that specimen. The original specimen of Amm . Yama , Forbes, 
is the same which I have referred to Amm. Beudanti, which now must stand under the 
former name, being distinct from the European fossil. 
