Rev. M. J. Berkeley on Helicolimax Lamarckii. 305 
13. Animal with shell of Truncatella truncatula, }3.; side view. 
14. Ditto seen beneath as crawling up a glass; taken when the muz- 
zle is exserted. 
15. Ditto ditto. 
16. Ditto ditto, when the foot is extended in the act of drawing up 
the shell. 
17. Ditto seen from above; a portion of the foot is also seen. 
18. The shell. 
13, 14, 15, 16 and 17 all more or less magnified. 
Arr. XL. On the internal structure of Helicolimax 
(Vitrina) Lamarckii. By the Rev. M.J. BerKecry. 
A FULL and minute account of the habits and external characters of 
this interesting animal has already been given in the Zoological Journal 
by my friend Mr. Lowe, who has furnished the specimens upon which 
the following observations were made. But as he has not entered into 
any anatomical details, some further account of the internal structure 
may perhaps not be unacceptable, though, from the small size of most 
of the specimens, that which I have to offer is necessarily imperfect. 
Of course, as I have nothing to add with respect to those characters 
which Mr, Lowe has so accurately given, it would be superfluous to make 
any mere repetition here. I shall therefore proceed at once to the 
anatomy, considering the present notes as a supplement to Mr. Lowe’s 
paper. 
The pulmonary cavity, is so similar to that of Helix, and the different 
organs disposed so nearly in the same way, that it is needless to give any 
figure or description. On the right side as usual is the rectum; on the 
left behind, the pericardium with the heart within, consisting of an 
auricle and ventricle; and itself situated beneath the slime bag. The 
membrane which forms the vault of the cavity, and over which the 
