70 CRETACEOUS GASTROPODA. 
different species, as I have pointed out in my revision of the Gosau Gastropoda (oc. 
cit.) I have compared our Indian specimens with those from the Gosau, and 
I am unable to give any distinctions. The form of the shell, number of whorls, the 
short nodulose, transverse ribs—generally about 9, the thickened spiral stric, as 
well as the undulating striz of growth with their insinuations near the suture 
agree perfectly. Sowerby’s figure is characteristic enough, but that of Zekeli is 
derived from an imperfect specimen, and has not been very correctly restored. 
Localities —Andoor, Alundanapooram, and near Olapaudy in Trichinopoly dis- 
trict ; not common. 
Formation.—Trichinopoly group, near the boundary of the Arrialoor,—to which 
the last named locality refers according to Blanford’s map. 
VII. Fumily,—CONIDZ. 
Idem, Adams, Chenu and others; Conusip®, Gray. 
As universally acknowledged, this is one of the most peculiar and interesting 
families of the Gastropoda. The animals are all very much alike, being laterally 
compressed in accordance with the narrow inner space of the whorls, with an oblong 
and undivided foot which is provided with an aquiferous pore on the under surface. 
The head is produced into a tubular veil, with a retractile proboscis and subulate 
teeth, placed generally in two series on a prolongation of the proboscis. The tenta- 
cles are thickened at the base, close together on the tubular veil, which surrounds 
the mouth; the eyes are sessile on small bulgings, generally about the middle of 
the outer side of the tentacles. The siphon is long, recurved, producing an emar- 
gination on the anterior extremity of the reversed conical shell, the spire of which is 
more or less, but never very considerably elevated and pointed. 
From the great peculiarity in the dentition—ToxieLossa in Gray’s sense—H. 
and A. Adams describe the Conzpx as a separate family inthe higher division 
of ToxirERA of Gray. The latter author refers to the same sub-order the 
Conusip#, Acustpz and PLEvrorour. (see Guide 1857, pp. 4—7), each of which 
includes several genera. As regards the first and the last family (Corzm and 
Prevrorourps), we think Gray’s classification of high value; but we do not accept 
the Acusrpx,—more properly TzresripzxZ,—and shall refer to this family subsequently 
towards the end of the SrpHonosroMATa, near to the Prraurmprrripz. We be- 
lieve that the shells of the ZYzrzsrmxz have a great relation to those of the 
PyRAMIDELLIDE and CerrrupD#, and even their animals in the form of their loco- 
motive organ, the thick proboscis, small siphon, &c., are very closely allied to Vertagus 
and others. Geological considerations also are more in favour of this latter 
classification. Deshayes places the Pxzvrorommx and Coxmmx in one family 
under the last name. (Foss. de Paris, III, 337.) 
The Coxzpz have been up to the present, and are still generally described 
under one genus, Conus, Linné. H. and A. Adams divide them into seven genera ; 
Gray retains three; Keferstein, Deshayes and others, two (Conus and Dibaphus), as 
