OF SOUTHERN INDIA. 367 
26. Cantiaridus, Montfort, 1810 (ibid. p. 4238). Shell conoidal, generally 
rather thick, spirally striated or rugose; columella solid, smooth, rather straight, 
anteriorly terminating with a simple point. 
Fossil species of Cantharidus are rare. There are very few known from the tertiary and the 
eretaceous deposits, while similar species from the jurassics are usually ornamented with some strong 
ridges or granulated strie. From eretaceous rocks I may mention Turbo Duperreyi and Raulini, 
@Arch., from the Tourtia-beds of Belgium. I shall note a new species C. striolatus. 
27. Hlenchus, Humphrey, 1797 ( ibid. p. 424), only differs from the previous 
one by having the surface of the shell generally smooth, and the inner lip provided 
near the anterior termination with a conspicuous tooth. 
28. Aleyna, Adams, 1860 (Ann, mag. nat. hist., V, p. 407), very much 
resembles Hlenchus, but has a shorter spire and the inner lip is rather callous, 
terminating with a very strong tooth. 
29 (?). Bankivia, Beck, 1848 (ibid. p. 425), with regard to its form is allied 
to Elenchus, but the structure of the shell which is not pearly within makes it very 
improbable that the genus belongs to the Yrocurp* at all. The species may 
perhaps more correctly be referred to the paasravezLin&# (of the Tursrvipz), and 
even this can be objected to, as the columella is very peculiarly twisted. 
ce. Sub-family,—_ MARGARITINA. 
Shell thin, conically depressed, whorls rounded, columella excavated. 
30. Solariella, Wood, 1842 (H. and A. Adams, Gen. I, p. 481), has been 
originally proposed for a broadly conical species* with rather strong spiral ridges 
and a large, crenulated umbilicus. S. Wood especially drew attention to the 
similarity of the shell to Solariwm, being readily distinguished from it by the 
nacrous structure. H. and A. Adams quote Solariella only as a sub-genus of 
Monilea, but I have already noticed that the thin shell distinguishes it readily 
from that genus. The recent species of which there are only a few known are 
generally finely spirally striated. 
Fossil species are numerous from the palzeozoic formations upwards, and it seems very probable 
that several of the conical species described as Solarium belong rather to Solariella. Meek and 
Hayden (Proc. Phil. Acad., 1860, p. 423) also mention the frequent occurrence of these forms, when 
they propose for the Sol. flexistriatum, Ev. and Schum., the new generic name Margaritella, which 
must be considered as a synonym of Solaried/a. Another American cretaceous species is Solariella 
Abboti, Gabb, sp., and the same author lately described two from California, Sol. (Marg.) crenulata 
and globosa (Pal. Calif. I, 1864, pp. 118-119). European cretaceous species, like Turbo inconstans, 
Astierianus and Goupilianus, WOrb., and others most likely belong to Solariella. I shall 
deseribe two from South India, one of which, Sol. radiatula, Forb., sp., is common to Europe, 
and has been described from different parts of Germany and Austria, and the other So/. strangulata 
is new. 
31. Enida, Adams, 1860 (Ann. mag. nat. hist., V, p. 408). Whorls orna- 
mented with spiral and squamous strize, sutures canaliculated, last. whorl carinated 
at the periphery; inner lip somewhat expanded, and in the middle refiexed ; 
* Solariella maculata, S. Wood, from the Sutton Crag, 
