.^80 Mr. T. D. A. Cockerell's Notes on Slugs. 



Uroxys Rodriguezi, de Bovre. 



This species is described by M. Preudhomme de Borre in 

 tlic Ann. d. 1. Soc, ent. de Belgique, 1886, p. 107, and he 

 nienfions that it is the ^^Uroxys dilaticollis, Deyrolle," a 

 manuscript name. In tlie Briti,sh Museum collection there is 

 a specimen bearing this manuscript name, and it agrees well 

 with the description of U. Iiodriguezi. It appears to me, 

 however, that it is a Chceridium having a short, punctured 

 mesosternum and short anterior coxa3. 



XLV. — Notes on Slugs ^ chiefly in the Collection at the British 

 Museum. By T. D, A. Cockerell. 



[Continued from p. 288.] 



III. The Genus Liuacella, Blainville. 



While working on the slugs at the British Museum I came 

 across the type specimens of Lvmacella lactiformis, Blain- 

 ville. The two examples are in a bottle with the label 

 "Limacella lactescens" and another label, ajiparently written 

 by Dr. Heynemann, "Original zu Fig. 1. Taf. 7. Fer. Hist. 

 Nat." They are true Philomycus, presenting no generic 

 ditlerence from the well-known species of that genus. 

 Heynemann (1884) has referred them to Ai-ion, 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 

 witli 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 gonital 

 orifice at the base of the right tentacle. The outline of the 

 figure, and especially the anterior ])ortion of the mantle, 

 suggests at once a Philomycus. The supposed -.-l^'/oy^-like 

 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. IMie 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. tlfortiana in Man. Mai. is the 

 same outline, but ai)parently patched up tVoni an Arion ater, 



