Records of the Geological Survey of India. 
[vol, i. 
30 
SCAPHITES SIMILARIS, Stoliczka. 
1866. Scaphites cequalis, Sowerby, Stoliczka, Ceph. loe. cit., p. 167, PI. LXXXI, Figs. 4-6. 
I have compared in the British Museum the original specimens of Sowerby’s Sc. cequalis 
and obliquus as recorded in that author’s Mineral Conchology; the figures are in general 
correct. The inner whorls of both the species are usually of the same thickness and not to be 
distinguished from each other, but the form described as Scaph. cequalis has on the last 
whorl the transverse ribs less numerous, thicker, the sides somewhat more flattened, and 
the general form is usually a little longer than in Scaph. obliquus, Both are very closely 
allied, and, when examining numerous specimens in Sharpe’s collection and others in Paris 
and Dresden, the frequent occurrence of the two forms together in the same beds and the 
same localities so very much struck me that I thought they very probably only represent 
different sexes of the same species. Still so long as the distinctions, fomierl'y noticed, 
exist, and no other direct proof in favour of their specific identity can be produced, we cannot 
but retain them as distinct forms under separate specific names. 
The species which I have noticed as Scaph. obliquus (Ceph., p. 168) is in every respect 
identical with the European form, but the other which I have identified with Sc. cequalis, 
and for which I now propose the name Sc. similaris, is distinct from it, though it undoubt¬ 
edly must be regarded as a representative species. It differs from Sc. cequalis, by having 
the first whorls less involute, flattened at the sides, almost smooth, and by the want of the 
peculiar projection in the umbilical space at the base of the body-chamber, which projection 
is distinctly traceable in both the European species. Scaph. similaris also appears to be a 
more compressed form than Sc. cequalis. 
ANTSOCERAS,* Pictet, Ceph. 1. cit., p. 170. 
Anisoceras eugatum, Forbes, Ceph. loc. cit., p. 178. 
Anisoceras sub-compressum, Forbes (Ceph. loc. cit., p. 179, pi. 85, fig. 7) is based upon 
a fragment of the above species. Forbes' figures of Ards, rugatum, sub-compressum, and 
indicum, are taken from fragments which do not exactly agree with the specimens in the 
London Geol. Society’s collection, so far as the form of those specimens is concerned, hut 
there are fragments of all the species represented in the collection. Some of the specimens 
determined by Forbes as Aids, sub-compressum belong to Aids, indicum. 
TURRILITES, Lamarck, Ceph. loc. cit., p. 184. 
Tubbilites planorbis, Forbes, Ceph. loc. cit., p. 185. 
This name has most likely been applied to a small cast specimen of Amm. Sacya, 
Forbes, of which I found several small specimens, hut I have in this single instance not 
succeeded in procuring Forbes’ original specimen, from which fig. 5, pi. 9, in the Trans. 
Geol. Soc., London, was taken. 
Tpreilites, Coif, Beazoensis, Romer, Ceph. 1. cit., p. 189. 
Rdmer’s original of Turr. Brcizoensis is very like our fossil, but it shows a slight 
difference in tho direction of the ribbings connecting the tubercles; still their identity is 
very probable; neither of the two respective fragments are, however, sufficiently preserved 
to give a direct proof of this assertion. 
HAMULINA, d'Orbigny, Ceph. loc. cit., p. 192. 
Hahulina sttblevis, Stoliczka, Ceph. loc. cit., p. 193. 
I have seen specimens of this species in the .National Museum at Prague; they were 
collected from the lower beds of the Bohemian cretaceous deposits at Korizany. 
Summing up the most important changes regarding the different species, it will be 
observed that Ammonites Parana, Forbes, has been newly added to the list of the Cephalopoda; 
l b &abb wujes word, under date ot June 2nd, 1868, Philadelphia, that he has a new form, inter- 
i“ d i He also suggests a new generic name for species like Plyrhoceras 
Forbes mum , tofanguished by having two links, but it seems to me that our materials of good specimens of 
Ammmrnoidforms. V suftcleu to su PP° rt a ‘>y essential changes in the nomenclature of these ami others allied 
