30 LAWSON, ON LIMAX MAXIMUS. 
exerting compression on the sac, when, a portion of the wall 
being ruptured, the contained gelatinous matter is gradually 
forced out in a worm-like manner, or exactly as is the semi- 
fluid oil colour from the leaden tube of an artist. The cornea 
is at once perceived, and on two or three occasions I have 
teased from it a small, solid, transparent, pointed, elliptical 
body, which I dare say serves the function of crytalline lens, 
but I do not think this is easily or often detected. The 
integument is attached to the eyeball in front, but I cannot 
imagine it passes over it, else I should suppose there was a 
second cornea, unless, imdeed, it were termed conjunctiva. 
Yet Siebold states that the integument passes over the eye- 
ball as a thin, transparent lamella. Siebold also asserts that 
in no case can ganglionic globules be seen in the expansion 
of the so-called optic nerve, but why, I cannot think, it being 
a matter of the greatest ease to discern the very well-marked 
elliptical endoplasts, with their nuclei and granules. 
The pedal gland consists of a central canal closed behind, 
open in front, traversing the internal portion of the tissue 
of the foot, from the posterior extremity of the creature to the 
integument immediately beneath the mouth, and having 
attached to its lateral borders clusters of endoplasts, which 
simulate the structure of follicles. Between these clusters 
numerous blood-vessels lie, and therefore, did we suppose a 
water-vascular system to exist, we might conceive of the 
aqueous fluid being through this channel introduced into the 
blood. Various functions have been assigned to this organ, 
among which not the least seemingly absurd is that of smell, 
which Leidy* has set down to it. 
Reproductive System.—The organs which collectively make 
up this system are, as we might anticipate, akin to those 
represented in the genus Helix. They are those of the two 
sexes combined ; that set which is characteristic of either sex 
being morphologically complete in every individual, and not, 
as Steenstrupt would have us believe, the non-abortive 
moiety of a complex apparatus, which exhibits a complete 
bilateral symmetry. For perspicuity, the parts comprising 
this machinery may be thus classified, as in the case of 
Helix: 
1. Female. 3. Androgynous. 
2. Male. 4, Appendicular. 
* Silliman’s ‘American Journal of Science,’ 1847; and ‘Ann. Nat. 
Hist.,’ xx, 1847. 
+ ‘Untersoegelser over Hermaphroditismus ‘Tilvaerelse i Naturen,’ 
1845, p. 76. 
