—/ 
LAWSON, ON LIMAX MAXIMUS. 37 
portion of the reproductive apparatus, should have overlooked 
the glandular character of the outlet, and not less so that he 
should have represented the egg-sac as being of acrescentic 
form, and termed it the “ horned appendage.” Moreover, I 
can with difficulty imagine that he has ever seen the spermatic 
particles, for he figures these latter (as though he had been 
looking at tadpoles or, more probably, at pictures of human 
semen), with gigantic spherical heads, whereas, actually, they 
only exhibit an approach, and a very faint one; to a capital 
extremity, in the form of a little spiral coil. The testicular 
and uterine divisions of the genital system are supplied with 
blood by a lateral vessel, which passes from the vaginal end 
to the albumen-gland, lying upon the border of the uterus, 
and transmitting branches to this structure and to the testis. 
With regard to the distinctness of the latter organ, I may 
state that its excretory duct is not the semi-canal which 
Prevost* took it for; I have, after a little manipulation, suc- 
ceeded in isolating completely its lower or anterior end, 
together with its continuation, the penis. The retractor 
muscle of the intromittent tube is often absent, but when 
present is a simple band, arising from the integument above 
the foot. 
It is almost impossible to describe the anatomical peculi- 
arities of a creature so highly organized as that of Limax, 
with the accuracy, and perspicuity which are desirable ; hence, 
doubtless, in the foregomg very general account there may, 
of course, be errors, not only in observation, but in induction. 
These—should they exist—it is hoped, may soon be pointed 
out, by others more skilled in the examination of molluscan 
organisms than the author, who can only add, in conclusion, 
that his sole object in the communication of these researches, 
has been the advancement of biologic science, by an effort 
to elucidate what seemed to him, a subject left too long in 
obscurity. 
* © Ann. des Sciences nat.,’ xxx. 
