152 
CONTRIBUTIONS to the ANATOMY and HISTOLOGY 
of LIMAX AGRESTIS. 
By RicHarp Hanitscu, Ph.D., 
DEMONSTRATOR OF ZOOLOGY IN UNIVERSITY COLLEGE, LIVERPOOL. 
With Plates X., XI. and XII. 
[Read 11th May, 1888.] 
THE material for the following research into the anatomy 
and histology of the Slug, Limax agrestis, was obtained 
partly at Puffin Island, when I was staying there at the 
Biological Station, during the end of August and the 
beginning of September, 1887. The animals were found 
in abundance after rain, creeping over the grass-covered 
parts of the island. The rest of the material I got in the 
middle of January last, and also later on, in an old quarry 
in the neighbourhood of Liverpool, near to the “‘ Calder- 
stones.”’ Here the Slugs were easily found amongst dead 
leaves, beneath stones, or attached to decaying leather and 
other waste materials. The eggs of Limaz in different 
stages of development were frequently met with even at 
that early period of the year. 
The literature relating to Limax agrestis and other allied 
genera and species is very extensive (see pp. 165—168), and 
therefore it cannot be expected that this paper will bring 
forward many new things, My plan of working has been 
to collect all the information which is given in previous 
papers, to arrange it according to the chief systems of the 
body, to give an account of the results, and to fill up the 
remaining gaps by my own observations, or to decide as 
far as possible such points as were still under dispute. 
Naturally this paper must contain a good deal of historical 
