DOLILD A. 203 
provided with a float, like Ianthina; the larval shell has a thin, 
corneous operculum. 
Matsa, Valenciennes. 
Syn.—Cadium, H. and A. Adams. 
Distr.—M. ringens, Swains. (1xii, 25). M. denticulatum, Desh. 
Pliocene. 
Shell having the form and sculpture of Dolium, but the outer 
lip is thickened, somewhat reflected, and denticulated, inner lip 
with calloused plicate prominences. 
Pyrvuta, Lam. 
Fig-shell. tym.—Diminutive of pyrus, a pear. 
Syn.—Ficus, Rousseau. Ficula, Swainson. Otus, Risso. 
Sycotypus (Browne), Adams. Ficopsis, Conrad. 
Distr.—8 sp. West Indies, Philippines, W. Tropical America. 
Fossil. Cret.; India. Cret. and Eocene; United States. P. 
decussata, Wood (Ixii, 37). P. ficus, Linn. (xii, 40). 
Shell thin, pear-shaped, terminating anteriorly in a moderate 
canal; lip thin, smooth; surface cancellated or with revolving 
ribs. 
Animal with subulate tentacles and eyes at their outer bases ; 
mantle produced on each side, covering the shell; siphon straight, 
elongated; foot simple, thin, produced posteriorly. No oper- 
culum. 
The Pyrulez crawl very rapidly, bearing their light, elegantly- 
formed shells easily, and, with their neck stretched out, their 
siphon exserted, and their foot greatly expanded, present remark- 
able objects of contemplation to the malacozoologist. They 
are generally delicately flesh-tinted, with faint, marbled, crimson 
and pink markings; their eyes are large and black, and their 
long flat heads and necks usually white. 
prycHosyca, Gabb. Shell shaped like Pyrula; inner lip with 
one anterior very oblique fold. P. inornata, Gabb (Ixii, 39). 
Cretaceous ; Georgia. 
FICULOPSIS, Stoliczka. Pyriform, attenuated in front, inflated 
behind; spire very short; surface spirally and transversely 
striate or costulate; columella thick, angulated, plicate. P. 
Pondicherriensis, Forbes (1xii, 38). Cretaceous; So. India. 

(Macgillivrayide ?) 
The two following genera are probably larval prosobranchiate 
mollusks. 
Erneta, H. and A. Adams. 
Distr.—E. Macdonaldi, Ad. (\xxxvii, 10,11). Australia. 
Ciliated arms six in number; creeping disk rudimentary ; 
