OF SOUTHERN INDIA. 239 
this the single shells are with great difficulty distinguished from Vermiculus. 
Judging from the exterior form only, it appears very probable, that the Vermetus 
cochleiformis, Miller (Monog. Petreef. Aach. Kreide., I, p. 6, pl. 3, fig. 3,) belongs 
to this genus. 
4, Stiphoniwm, Mérch., 1861—? Browne, 1756. (Proc. Zool. Soe., Lond., 1861, 
p- 152). 
If it be proved that none of the shells, which had been called Siphoniwm by 
Browne, belong to this genus, as established by Mérch, the name ought to be better 
replaced by some of the latter synonyms.— We are not acquainted with any creta- 
ceous form, which would belong to this genus. 
5. Vermiculus, Lister, 1688. (Mérch in Proc. Zool. Soc., Lond., 1861, 
p. 169). 
The shell of this genus is.characterised by being in the early stage of age 
regularly coiled like a Turritella, and afterwards with the last whorl uncoiled, 
variously twisted, or more or less straight and prolonged. There is apparently 
no other distinction between the shells of Vermiculus and Burtinella, except that 
the latter are coiled in a broad, largely umbilicated cone. 
There are several tertiary species, which from their great affinities with the living shells are 
correctly classed in this genus. In the determination of the cretaceous species more difficulty is 
experienced. We know at present four European species, which very probably should be classed 
here: Vermiculus Rouyanus, D’Orb., sp.; V. albensis, D’Orb., sp.; V. Sancte-crucis, Pict. et 
Camp. and /. gaultinus, Pict. et Camp. (vide Pal. Suisse, 3me. Ser., p, 344), To these has to be 
added the Indian species, Vermetus anguis, Forbes (vide p. 243), Several species of Vermiculus 
are known from jurassic beds, and from the Trias, species like Scoliostoma fasciatum, Hornes, 
(Denksch. Akad., Wien, 1856, Vol. XII, pt. IT, p. 30, pl. 3, figs, 7-8), and even Sc. moniliferum, 
Hornes, zdidem, fig. 6), have probably to be added to Vermiculus, 
6. Spiroglyphus, Daudin, 1800. (Moreh Proc. Zool. Soc., Lond., 1861, 
p. 1326). 
This genus is very numerously represented. fossil, but as yet little known. 
Of eretaceous species only the Vermetus clathratus, Binkhorst (Gast. et Ceph. 
Limbg., 1861, p. 35, pl. 5%, fig. 3), is probably a Spiroglyphus, judging from 
its relation to Sp. glomeratus, Bivona. 
7. Vermetus, Adanson, 1757. (Morch in Proce. Zool. Soc., Lond., 1861, 
p. o04. 
Adanson (Hist. Nat. Senegal, p. 160, pl. 11), figures different forms under this 
generic name, but, as for some of these Lister’s denomination of Vermiculus has 
already been applied, Mr. Mérch consequently retained the name Vermetus only 
for those species, which have folds on the columellar margin. 
Morch distinguishes two sub-genera, Vermetus, Adans., and Petaloconchus, Lea, 
with two other sub-divisions, Thylacodus and Aletes; but he remarks himself, that 
the recorded distinctions are not constant, and that one form passes into the other 
during different stages of age. 
There are several fossil tertiary species, which belong to Vermetus proper, but I am not 
acquainted with any from cretaceous deposits. 
