Mr. C. Hedley on Australian Slugs. 169 
The foregoing is intended merely as a preliminary commu- 
nication, since, as already mentioned, I purpose to treat the 
development of Dredssena more fully later on. In conclu- 
sion I would just remark that Prof. Blochmann writes to me 
from Rostock that he has found the larve of Dretssena in 
the Warnow. Finally, I cannot refrain from expressing in 
this place also my most sincere thanks to privy-councillor 
Schulze for the great kindness with which he placed the 
resources of the Institute at my disposal for the collection of 
material, which was repeatedly necessary, and afforded me 
the opportunity of making abundant use of the reservoir in 
the garden of the Institute, whereby my task was materially 
facilitated. 
XXVITI.—Remarks on Australian Slugs. By C. HEDLEY, | 
F.L.S., Assistant in Zoology to the Australian Museum. 
In a recent number (Feb. 1891) of this Magazine exception 
was taken by my friend Mr. Pilsbry to the treatment of some 
American slugs by Mr. Cockerell. I also wish, as ‘ one who 
has studied the species in their native forests,” to add my 
remonstrance against the manner in which the same author 
has dealt with the Australian representatives in his essay 
“On the Geographical Distribution of Slugs” (P. Z. S. 
1891, pp. 214-226). I hope that I am not overstepping the 
bounds of courteous criticism by characterizing this article as 
somewhat superficial though pretentious, and by adding that 
the conchological fraternity would have been more grateful to 
this author had he contributed to the treasury of science more 
“facts and figures” and fewer MSS. names and imperfect 
generic diagnoses. 
The description * of Limax megalodontes, Quoy and 
Gaimard, though considered by Mr. Cockerell not to be ver 
clear, is amply sufficient to debar the entrance of that species 
into the genus Anedtea. ‘The jaw is minutely described and 
is certainly that of a Limax, while the statements that “le 
manteau assez étendu est ovale [that of Aneitea is always 
triangular] et susceptible sans doute de recouvrir la téte.... 
La couleur de cet individu est d’un blanc jaunatre parsemé de 
taches noir... . Sa longeur est d’un pouce huit lignes,” con- 
vince me the French writers had before them the introduced 
species L, flavus, Linn., still common in the same locality. 
* Voyage of the ‘ Uranie,’ Zoology, p. 426, 
