OF SOUTHERN INDIA. 129 
Sabaudianus et bilineatus, P. et Camp; IL calcar, Sow.; I. pleurotomoides, Miiller. 
In my revision of the Gosau-Gastropoda (Sitz. Akad. Wien, 1865, LII, p. 80), 
T have mentioned as doubtful J. loricatus (Lritonium id. Zek.); and I actually 
do not know where the two last named species could be better placed, although they 
have no intermediate stronger but all very sharp varices, as most of the species of 
Chicoreus have, to which genus alone they can form additions. The six first named 
species may belong to the same group, but they are not so perfectly known as to 
admit of their difference from Pollia and Tritonidea of the rusrym being positively 
stated. All this is to be looked for with better materials, and the generic denomina- 
tion of Hwrex shows in general only, that the species most probably belong to the 
uuricivz. Of the three species noted by Prof. Forbes as Iwrex I have referred the 
M. Pondicherriensis to Pollia and UU. Trichinopolitensis to Tritonidea of the rvsivz, 
but Iam not able to trace UZ. fluctuosus, nor could I pronounce an opinion on its 
generic denomination. The species may prove to belong to this or to the former sub- 
family ; it ought provisionally to stand here, as no reason can be given for its being 
shifted about into other groups. 
Gabb lately described a very interesting species, Typhis antiquus, from the 
cretaceous rocks of California (Pal. of California, 1864, I, p. 82, Pl. 18, Fig. 81.) ; it is 
the first representant of the genus in cretaceous beds. We notice from South India 
another equally remarkable species belonging to the sub-family wvrcrmv# and in 
all probability to the genus, 
XXVIT. TROPHON, Montfort, 1810. 
1. TropHon OLpDHAMIANUM, Sfoliczka. Pl. XI, Fig. 18. 
Troph. testa elongata, fusiformi ; anfractibus gradatis, supra valde-excavatis, 
ad marginem suturalem subinflatis, infra planiusculis, spiraliter crasse striatis, trans- 
versim lamellose costulatis ; costulis supra in excavatione obliquis, ad angulum spimu- 
losis, infra rectis, m striis spiralibus lamellose—elevatis, plus minusve muricatis ; labio 
levigato, tenui; apertura ’—canali ?— 
Spiral angle 44°; sutural angle 9°. 
This very characteristic fossil agrees in every respect so entirely with living 
species of the genus Trophon, that there can be little doubt as to its being a repre- 
sentative of this group in the cretaceous deposits. 
All the whorls are along the suture deeply and broadly excavated, below nearly 
flattened ornamented with coarse spiral strize, which are usually unequal in strength, 
numerous on the last whorl, while only three remain visible on the previous, and 
gradually disappear towards the uppermost, The margin of the suture is somewhat 
swollen up; on the excavated portion below no spiral striation is visible, but the 
oblique transverse ribs, which are nearly straight on the lower portion, are here 
lamellar and more or less elevated into spines on crossing the spiral striae, especially 
so on the angle, which bounds the excavation below. 
2K 
