300 CONOVULID. 
attachment to the body is long and slender. The structure of 
the foot is that of Pedipes. 1 observed it twenty-five years 
ago, and its quality of locomotion perfectly agrees with the 
etymology of that term; it is very slow, in consequence of a 
double action of the pedal disk beg necessary to effect pro- 
gression, the anteal portion being first carried forward, accom- 
panied by the head and neck; it is then fixed, when the 
posterior portion carrying the shell is drawn up to its prede- 
cessor or pes pedi, and so on, and thus a slow march is accom- 
plished. There is no operculum. The neck, from the length 
of its protrusion, admits of close examination, but no gene- 
rative organ was observed. I think that, from all the fourteen 
specimens having ovaria, they, like the Helices, are herm- 
aphrodites with mutual congression. The sac of the ova is 
deposited in the posterior cavity of the shell, which part is. 
without internal spire ; the animal appears to have the power 
of absorbing the septa; the oviduct winds, entwined with the 
brown liver, accompanied by the intestine, to its termination 
at the middle of the right side of the aperture. The intestine 
is by far the most conspicuous organ of the viscera ; it is very 
large and always fully distended; its course, after leaving the 
pylorus of the bursiform stomach, is along the left side, glued 
to the liver; it descends to nearly the ovarian bag before it 
ascends on the right side of the liver to its termination at the 
middle of the aperture, where the faecal matters may be seen 
to issue, not in distinct pellets, but im large cylindrical-formed 
brown sandy masses ; the rectum is a mere aperture, but, like 
the intestine, of large calibre; there are two slight sigmoid 
flexures, otherwise the form and course of the intestine and its 
formed conteuts are very similar to those parts in Heliz; the 
cesophagus is long; but though we could not detect all the 
organs of the buccal mass, we found at the usual place the 
nervous cordon of two oval yellow ganglions. 
I now come to the most important point of this examina- 
tion, the character of the respiratory organ, as some mala- 
cologists are still in doubt whether the animal breathes pure 
air or extracts it from water; my own prepossessions have 
been of the latter cast. Having submitted fourteen live ani- 
