36 LAWSON, ON LIMAX MAXIMUS. 
is lost in the general integument. It is upon the right side, 
about midway between the pulmonic orifice and right upper 
tentacle, and in a plane about + inch lower. 
The eggs of this creature are deposited during the months 
of August and September, usually under large stones, but 
seldom in the earth; they are about twenty in number, 
collected together by means of glutinous threads which adhere 
to them. The egg is spherical, of an opaque white, measures 
about 4 inchin diameter, and consists of two coats, a quantity 
of albumen, and the yelk-mass. The outer coat, and that 
in which the opacity is observed, appears glistening and 
granular under the microscope when viewed by reflected 
light ; when isolated, it is found to be exceedingly tough, and 
to be composed of some material having a fibrillated structure 
apparently, and bearing in its substance particles of carbonate 
of lime, for, when acted on by weak acetic acid, an effer- 
vescence results, and the opacity vanishes. The fibres of 
which it seems made up are not real, but due possibly to the 
wrinkling to which the membrane is exposed in submitting 
it to examination ; at all events, when a portion of it has, by 
careful manipulation, been flattened out, and allowed to remain 
for some time in a solution of caustic ‘potash, the fibrillation 
disappears, and a clear, structureless membrane remains. The 
inner coat is transparent, but presents the falsely fibred aspect 
of the outer one. The yelk is a yellowish mass, presenting 
the usual granular aspect, and built up of rounded endoplasts 
oil-globules, and coloured granules. 
General remarks.—In contrasting the reproductive appa- 
ratus of Limax with that of Helix, as concerns position, form, 
and structure, we find that, while occupying the same place 
as that of Helix with relation to the viscera among which it 
lies, it presents many characters, morphologically ‘and histo- 
logically, which were not observed in that of the latter genus. 
We miss here the dart-sac, multifid vesicles, flagellum, 
and spermatheca-cecum, which are so fully developed in 
Helix. The first has no representative ; the cloacal glands 
may be a substitute for the second; and since it is probable 
that the third and fourth are mutual adaptations—the one 
owing its development to the requirements of the other—it 
follows that the non-development of the one is consequent 
upon the teleological absence of the other. Here, too we‘ 
observe no cloacal valves, and from this it is probable that 
the function which in a former memoir I attributed to these 
organs is not the incorrect one. It is not a little surprising 
that Moquin-Tandon, who has given a rude engraving of a 
