OF SOUTHERN INDIA. 375 
periphery and convex at the basis, being slightly impressed in the middle ; 
aperture subquadrate, outer lip thin, anteriorly sinuous, inner lip nearly straight, 
columella solid, terminating with a slight point. The entire surface of the shell 
is covered with fine spiral striz, by which only it is distinguished from Turbo 
Raulini, V@Archiac (Mém. Soc. Géol., France, 2nd ser., vol. II, p. 341, pl. 23, 
fig. 12), from the Tourtia beds of Tournay in Belgium, both these species being 
in every other respect almost identical. 
The recent species of Cantharidus are not usually striated; when, however, the 
superficial, polished surface of the shell is a little eroded, the striation becomes 
perceptible. 
Locality.—Comarapolliam, in whitish sandstone; very rare. 
Formation.—Arrialoor group. 
XCII. SOLARIELLA, 8S. Wood, 1842. 
1. SoLARIELLA RADIATULA, Forbes, sp., Pl. XXIV, Figs. 17-19; Pl. XXVIII, 
Figs. 8-9. 
1846. Trochus radiatulus, Forbes, Trans. Geol. Soc., Lond., VII, p. 120, Pl. XIII, Fig. 11. 
i847. Trochus castor, @Orbigny, Paléontologie d’Astrolabe, Pl. IV, Figs. 15-17. 
1851. Turbo glaber, Miller, Petref. Aach. Kreidef., pt. II, p. 43, Pl. V, Fig. 6. 
Sol. testa conica, subturrita; anfractibus 7-8, convexiusculis, sutura simplici 
junctis, gunioribus spiraliter multi-striatis atque striis incrementi transversalibus 
notatis, adultis fere levigatis ; ultimo ad peripheriam rotundato, ad basin sub-convexo, 
umbilieato; apertura quadrangulari, antice in margine umbilict emarginata ; labio 
tenui, postice angulato, labro simpliciter arcuato ; margine umbilici crenato. 
Spiral angle 60°- 80°; sutural angle 12°. 
Height of shell : diameter of its basis (considered as 1:00) .. L15—1-00. 
» of onewhorl : itswidth ... ( es ee) w. 0-40—0°35. 
Shell more or less broadly conical, composed of about seven or eight convex 
volutions, which are separated by an impressed, simple suture. Young specimens 
have the whorls very narrowly and numerously spirally striated, and besides eovered 
with thin, transverse ribbings, which are more distinct posteriorly than anteriorly ; 
older grown specimens often become nearly smooth, and their suture occasionally 
shightly canaliculated (see Fig. 17, Pl. XXIV); some of the spiral posterior strize 
at the suture occasionally are stronger than others. The last whorl is rounded at the 
periphery, somewhat flattened at the base and umbilicated, the umbilicus having a 
distinctly crenulated edge. The aperture is quadrangular, with thin margins, the 
inner lip forms posteriorly an angle from which a slight rib runs upwards in the 
internal space of the umbilicus. 
Forbes’ figure is somewhat deficient, and that of d’Orbigny is taken from a 
small, but not well preserved specimen. Miiller’s figure represents some of the 
broad varieties, and the characters of the species are well pointed out in the author’s 
description. I had an opportunity of examining all the original specimens in 
London, Paris and Aix-la-Chapelle and ascertaining their identity. 
