OF SOUTHERN INDIA. 241 
Coral-rag near Scarborough. Morris (Cat. p. 94) unites this species with Ver. con- 
cinnus, Sow. sp., under the name of Vermicularia compressa, Young and Bird; but 
this is scarcely admissible from the drawings of the species. The two last may 
very probably be identical, but the first is readily distinguished by its strongly 
contracted tube, into which the aperture is prolonged. 
Locality —North of Odium, in clayey beds, common and characteristic for the 
Formation.—Ootatoor group. 
2.—TUBULOSTIUM CALLOSUM, Stoliczka, Pl. XVIII, Figs. 26-32. 
Tub. testa late conica, levigata, apice acuminata seu obtusa, plerumque sinis- 
trorsa, rarissime dextrorsa; anfractibus callositate crassa junctis, atque precedentes 
plus minusve tegentibus, ultimo ad peripheriam pronato, tricarinato ; basi in medio 
aliquanto rimata, sepius callositate tumida tecta; apertura angustata, tubi- 
Sormi, paulo producta ; anfractuum sectione interna circulari. 
The basal diameter of the largest specimens does not usually exceed 25mm., and the height 18mm. 
The trochoid form of the shell, being generally sinistral, and the great deve- 
lopment of the callosity, by which each succeeding whorl attaches itself to, and 
partly covers, the preceding volution, are very characteristic distinctions of this 
species. The surface is, save some irregularities in the impressions of the strise 
of growth, quite smooth. The embryonal whorls are spiral, somewhat mammillate, 
though rarely found preserved, being easily broken away. They must have been 
concamerated, as they are not filled with the substance of the rock, in which they 
were buried, which would at least occasionally have taken place, if they had been in 
open communication with the rest of the whorls. There is no direct sign, that the 
shell was, even in the earliest stage of growth, attached or fixed. The periphery of 
the last whorl is produced, thickened, and provided with three smooth keels. The 
centre of the excavated basis is either umbilicated or more frequently covered up 
with a callosity. The tube, into which the aperture is produced, is never very long, 
but always distinctly marked. The interior section of the whorls is circular. 
T am not ‘acquainted with any species, which could be compared with this 
remarkable shell. It is evidently the same which Mr. H. Blanford mentions in his 
report (Mem. Geol. Surv. of India, Vol. IV, pt. I, p. 83) as “a peculiar conoidal- , 
coiled Serpula.” 
Localities —North of Ootatoor and neighbourhood of Kauray ; according to 
Mr. Blanford common in, and characteristic for, the “clays of the lower beds” of 
the 
Formation.—Ootatoor group. 
