LAND AND FRESHWATER MOLLUSCA 
OF 
WING Diy WAL 
Part V._MAY 1886. 
(Plates XLIIL.-LI.—Jume 1884.) 
INTRODUCTION. 
In order to keep the two great natural divisions cf Land Mollusca 
distinct, the Helicidze and the Cyclophoridx, I have restricted this 
Part to the latter, for such an arrangement will much facilitate the 
work of the conchologist. 
Drawings of the animal of Cyclophorus are given, but I do not 
now describe that genus in detail; the figures, although taken from 
spirit-specimens, serve to give a conception of the animal of the 
smaller genera now treated of. 
I have selected species of Alyceus and Diplommatina, also Rha- 
phaulus, because it is a tube-bearing genus like Aly-ewus. In the 
‘Conchologia Indica’ a number of species in the two first genera 
were left unfigured by Mr. Sylvanus Hanley, and the number of 
new forms has been largely increased by those since discovered ; 
several of these are now figured side by side with their nearest 
allies, which, although before given in the above work, were 
figured in a very unsatisfactory manner. It has been suggested to 
me, and it would no doubt have been of more advantage to my work 
and secured a few more contributors, if I had given plates of new 
species selected indiscriminately from among all Indian genera of 
the Mollusca, and as soon after their discovery as possible. I have, 
however, deemed it best, in the true interest of conchology (so far 
as I can serve it), to continue to work out together closely allied 
genera, and thus eventually make the work as it progresses rather 
a collection of monographs of the different genera. 
In Part VI. i shall revert to the Helicide, and continue the 
genera already treated of in the first four parts, leading on to the 
more slug-like forms, such as Girasia &e., intimately related to 
those already described. 
PART Y. Q 
[Plates published June 1884.) 
