134 CRETACEOUS GASTROPODA 
quoted by H. and A. Adams (Gen. I, p. 114) as sub-genera of Pseudostrombus, Klein 
(Dorsanum, Gray). It is by no means certain that these two generic groups 
do not belong to the Trrronzzp#. I should say, judging from figures only, that 
the ornamentation and the form of the aperture would rather be in favor of such 
a transfer. The last of Gabb’s species may be possibly a Hindsia, if not a 
Tritonidea of the rusinZ. 
9-12.—Tritonium gravidum, Lagena nodulosa and secans, and Hindsia eximia 
are four species from the South Indian cretaceous rocks. The descriptions of these 
are given below. 
To these have to be added probably the following :— 
Triton atavus, Forbes (Trans. Geol. Soc. Lond. VII, p. 126, Pl. 18, Fig. 14). 
I have not been able to trace this species, and until other specimens have been 
procured, Forbes’ name must be retained. Certainly the species is not a Fusus, to 
which all subsequent writers following D’Orbigny refer the same, but in all probabi- 
lity is a true Tritonium. 
Triton ? elegans, Desh. (Mem. Soe. Géol. France, 1842, V., pt. I, p. 14, Pl. 17, 
Fig. 18, Fusus id. D’Orb.) is probably a Hindsia, so far at least as the exterior 
character of ornamentation is concerned, and very much the same appears to be the 
case with 
Fusus Gaultinus, D’Orbigny (Pal. Franc. Crét. II, p. 335, Pl. 223, Fig. 1); 
Fusus Vibrayeanus, D’Orb. (ibid, Pl. 223, Fig. 6); Buccinwn cancellatum, Alth. 
(Haidinger’s Abhandlungen, 1850, III, p. 224, Pl. 11, Fig. 25), from the cre- 
taceous deposits near Lemberg in Galizia; and Husws pedernalis, Rimer (Kreide- 
bildg. Texas, 1852, p. 38, Pl. 4, Fig. 13), will probably be shown to belong to 
Hindsia also. The figured specimens seem to have been all in tolerably good 
preservation, and the point of difference could be very easily settled by an inspection 
of the originals. 
The following so called species have to be excluded from the family 
Trironunz: Tritonium crebriforme, Zek. (vide Stoliczka in Sitz. Akad. Wien, 1865, 
LIT, Revis. p. 80) being only a fragmentary specimen of a Cerithium ; Tritonium 
loricatum, Zek. (Gosau Gasterop. 1852, p. 83, Pl. 15, Fig. 3; Stoliczka, loc. cit. 
p- 80). This species has been transferred by me to Mwrer, and as the specimen 
figured by Zekeli is a perfect one, it appears tolerably certain that the species 
belongs at least to the sub-family arvrrczya, although it is difficult to determine the 
genus strictly. Were the outer lip thickened by a varix, it might be justly referred 
to Hindsia, but in such a case the single known specimen could be only in a 
transitory state of growth. : 
Summarizing the above notes we may say, that there are at present 12 species 
of cretaceous Trrronzzp# known as certain, divided into equal numbers of four, 
from Europe, from North America, and from India. Five species more, viz., three 
from Europe, one from North America, and one from India, are somewhat doubtful, 
but most probably belong to this family. Of all the species yet found in the creta- 
ceous deposit, not one belongs to the forms commonly known under the generic name 
