88 Prof. F. M‘Coy on a new Volute from 
and is more or less considerably modified in form. Anda 
more remote analogy is offered by male spiders, in which the 
tips of the pedipalps are curiously modified and perform the 
duty of conveying spermatophores to the genital aperture of 
the female. 
My collector has since brought me, from a marsh in the 
immediate vicinity of the station, specimens of P. bengalensis, 
or a species closely allied thereto, in which also the right 
tentacle is hooked in the male. 
1. View of a male P. crassa, to show the hooked right tentacle, 
2. Shell of an aged female of P. crassa. 
Fie. 3. Shell of an aged male. 
4, Shell of a female in the prime of life. 
Fig. 5. Shell of a male in the prime of life. 
Obs. The animals of the two aged specimens have prolonged their 
body-whorl much beyond the old peristome, corresponding to that of the 
two in the prime of life. 
Silchar, Cachar, April 2, 1881. 
1X.—Description of a new Volute from the South Coast 
of Australia. By Freprrick M‘Coy, F.R.S., Professor 
of Natural Science, University of Melbourne. 
[Plate VII. ] 
Voluta Roadnighte (M‘Coy). 
(Pl. VII. figs. 1 & 2:) 
Descr. Broad fusiform; pullus at apex of spire very large, 
smooth, spheroidal, oblique, of about 14 turn; spire conical, 
