414 Records of the Indtan Museum.  [VoOL. VII, 1912.] 
like portion which projects freely into the branchial cavity 
(ple sexaxerhc. 4): 
Internally the duct portion of what has been tentatively 
named albumen sac is marked by numerous fine longitudinal 
ridges, all of which become much weaker as soon as they enter the 
sac. Most of the sac seems to have a simple membranous wall. 
The collecting duct of the ovarian tubules is also ridged 
longitudinally. 
The wall of the oviduct internally is evidently glandular 
almost throughout. Slight ridges and hollows run in transverse 
lines on the side towards the branchial cavity, being weakest 
(see pl. xxxii, figs. 18—20) along the line where they are nearest to 
that cavity (through the wall). 
Along the back-line, almost dorsally, a swollen ridge with 
grooves in its surface projects as an almost horizontal shelf into 
the cavity along practically its whole length. Sheltering beneath 
its under side is the main channel which is bounded on its forward 
and lower side by a thick ridge. This ridge rises up towards the 
end and finally goes into the roof of the terminal narrow part of 
the duct. On the anterior side of this ridge the transverse ridges 
and hollows mentioned above are much higher than elsewhere 
(pl. xxxii, figs. 18 and 19). 
The whole effect is to partially mark off a canal portion of 
the oviduct, ventral and posterior, from a large chamber, more 
ot less dorsal and anterior. The shelf and the thick ridge already 
mentioned have not grown sufficiently to meet and fuse so the 
canal portion and the chamber are connected all along (see pl. 
xxxii, figs. 18 and 20). 
The following are some of the papers referring to Volutidee :— 
Bouvier, E. L.—lLe systéme nerveux des Gasteropodes Proso- 
branches.—Amn. Sct. Nat. Zool., ser. vii, tome 3, 1887. 
Bouvier, E. L.—L’organisation des Volutes.—Bull. Soc. Philo- 
mathique, ser. vii, tome xii, p. 102, 1886-7. 
Gray, J. E.—Observations on Volutids.—Ann. Mag. Nat. 
Hist., ser. 4, vol. i, p. 310, 1868. 
Pace, S.—Voluta musica.—Pvoc. Malacol. Soc., vol. v. 
Perrier, R.—Le rein des Gasteropodes Prosobranches.—Amn. 
Sci. Nat Zool., 18go. 
Pilsbry-Tryon.—Manual of Conchology. 
Woodward, M. F.—Anatomy of Voluta, ete.—Proc. Maltacol. 
Soc., iv, 1900. 
a a 
