380 
Mr. T. D. A. Cockerell’s Notes on Slugs . 
Uroxys Rodriguezi , de Borre. 
This species is described by M. Preudhomme de Borre in 
the Ann. d. 1. Soc. ent. de Belgique, 1886, p. 107, and he 
mentions that it is the u Uroxys dilaticollis , Deyrolle,” a 
manuscript name. In the British Museum collection there is 
a specimen bearing this manuscript name, and it agrees well 
with the description of U. Rodriguezi . It appears to me, 
however, that it is a Chceridium having a short, punctured 
mesosternum and short anterior coxae. 
XLV. — Notes on Slugs , chiefly in the Collection at the British 
Museum . By T. D. A. Cockerell. 
[Continued from p. 288 .] 
III. The Genus Limacella , Blainville. 
While working on the slugs at the British Museum I came 
across the type specimens of Limacella lactiformis , Blain- 
ville. The two examples are in a bottle with the label 
u Limacella lactescens ,” and another label, apparently written 
by Dr. Heynemann, u Original zu Fig. 1. Taf. 7. Fer. Hist. 
Nat.” They are true Philomycus , presenting no generic 
difference from the well-known species of that genus. 
Heynemann (1884) has referred them to Arion , but he could 
not have examined them sufficiently, and was no doubt misled 
by the figure in Man. de Mai. (1827), pi. xli. That they are 
really Blainville’s types need not be doubted, as they agree 
with his figures in outline, and his original description, 
notwithstanding that he misunderstood the characters of the 
slug, is sufficient to show that he had not an Arion before 
him. He refers to the absence of a shell and the genital 
orifice at the base of the right tentacle. The outline of the 
figure, and especially the anterior portion of the mantle, 
suggests at once a Philomycus . The supposed ArionMks 
mantle indicated in the figures is really due to an outline of 
some of the internal organs, visible on account of the trans- 
parency of the slug. The figures in Journ. de Phys., 
November 1817, show how the mistake began, fig. 4 having 
even a sort of spiral coil in the middle of the anterior part of 
the mantle. The figure of L. elfortiana in Man. Mai. is the 
same outline, but apparently patched up from an Arion ater , 
