352 CRETACEOUS GASTROPODA 
Turbo Wichaillensis, Pict. and C., Turbo Loclensis, P. and C., Delphinula Bonnardi, 
d@Arch., Turbo Geslint and Mulleti, d’Arch., and probably others which are only 
known from specimens too imperfect to admit of even an approximately correct 
generic determination. 
The multispiral, calcareous opercula figured by d’Orbigny (Pal. frang., terr. 
cerét. II, pl. 186 bis, figs. 13-17) and by Reuss (Denksch. Akad., Wien, 1854, VIL. 
pt. I, pl. 29, fig. 4,) most probably belong to species of the Lrorirpz. 
We have nothing to add from the cretaceous deposits of South India. 
LIL. Family,—_TURBINIDA. 
H. and A. Adams, Gen. I, TrocHipZ, ex parte, pp. 389-403; Gray, Guide, 1857, TurBinrpz ; 
Chenu, Man. I, TrocHipa, ex parte, pp. 342-351. 
The animals of the TurzinrpZ in respect to general form of the body and the 
dentition are in no way particularly different from those of the related families. 
They generally have a short, not retractile, rostrum; long tentacles, short eye- 
peduncles, the necklobes and also the lateral fringe well developed, and the operculi- 
gerous lobe generally provided with a few long cirrhi. 
The principal characteristic lies in the presence of a thick calcareous coat on the 
outer side of a thin, generally paucispiral operculum. There must be some reason 
for the secretion of this calcareous mass, probably resting in a peculiarity of the 
operculigerous lobe. 
The shells are of very different form, though always turbinate, but either 
smooth or variously ornamented, with rounded or angular whorls. 
We include three sub-families in the Tvraryipa, meme: PHASIANELLINE, 
TURBININE, ANd ASTRALIINAE. 
a. Sub-family,—PHASTANELLIN 2. 
EuTRoPUNz, H. and A. Adams’ Gen. I, p. 389; zurRoPIANA, Gray, Guide, 1857, p. 145; 
PHASIANELLIN2, Chenu, Man. I, p. 342; Phasianella auctorum. i 
In the large species of the pxaszavzezzriv# the neck-lappets are very large and 
ciliated, while in those of small size they are said to be wanting; the fringe at the 
upper part of the foot is always very small, but still traceable; the foot is very 
narrow and divided by a longitudinal furrow; the operculigerous cirrhi are three on 
each side and of considerable length. Operculum ovate with a smooth, thick, 
calcareous coat, 
The shells are porcellanous, polished, ovate or turbinate, generally smooth, aper- 
ture ovate with the margins posteriorly not united, and the inner lip smooth. 
The following generic and sub-generic distinctions have been proposed :— 
1. Phasianelia, Lamck., 1804, has been restricted by H. and A. Adams (Gen. I, 
p. 389) for the larger species, in which the neck-lappets are well developed; the 
shell is ovate, smooth and polished; aperture ovate with the inner lip moderately 
thickened ; columella solid ; the outer lip is sharp. 
