i892.] 



THE BRITISH NATURALIST. 



232 



cated numerous papers on Arachnidae, and on Insects, to various 

 Natural History Journals and proceedings of Societies. Ornithology 

 has also had a large space of his attention, and he possessed at one time 

 a fine collection of British Birds, and a good collection of eggs. 

 Excepting four years at Durham, 1855-1858, two at Southport, in 

 Lancashire, 1859-60, and two years abroad, 1864-65, in Egypt, 

 Palestine, and the Continent of Europe, his residence has been at 

 Blox worth, in Dorsetshire, where he now lives. Mr. Picard- 

 Cambridge's collection of Arachnidae (true spiders) is very extensive, 

 and contains perhaps a larger number of types than any in existence. 

 His collection of known British species of Aranaidea, PJialangidea, and 

 Pseudo-Scorpions, is nearly complete, many of the specimens being 

 unique. His exotic collection is also rich in various other groups of 

 Arachnids. Lepidopterists will remember him as introducing Lyccpna 

 argiades as a British butterfiy, and also for his discovery of T richoptilus 

 paludu7n, which had been lost for many years. 



Mollusca. — Notes. 



Notes on Limax filans. Hoy. — This is described by Hoy in Trans 

 Linn. Soc, Vol. I., pp. 183-185. The diagnosis is " Limax (filans) 

 cinereus margine flavo," and the author remarks that it seemed to be 

 between L. agvestis and L.flavus. 



In Trans. Linn. Soc, Vol. 4, p. 85, Latham describes and figures, 

 from Col. Montagu's MSS, another spinning slug, from Penryn, Corn- 

 wall. This is not called filans, but correctly regarded as a variety of 

 L. Agvestis. 



There can be no doubt, I think, that Hoy's L. filans is a synonym 

 of L. marginatus (arborum), but singularly enough, Latham's slug has 

 been going under Hoy's name of filans in nearly all the books,* through 

 the perpetuation of some early mistake. Thus the principal synonymy 

 stands as follows : — 



Limax marginatus, Miiller. 

 1774. Limax Marginatus, MiilL, Verm. Hist., Vol. 2, p. 10. 

 1 791. Limax filans, Hoy, Tr. Linn. Soc, p. 184. 



Agriolimax agrestis, mut. fiaviclypeus, (D. & M.) 

 1774. Limax agrestis, var. E., MiilL, Verm. Hist., Vol. 2, p. 8. 

 1820. L. fila7is=agrestis. Leach, Syn. Moll. G. B., p. 74. [proofs only.] 

 1855. L. agrestis, var. 3, L. filans, (jrav, Cat. Pulm. Brit. Mus., Part 

 I, p. 170. 



*Mr. Williams, in Sci. Gossip, 1887, p, 244, remarks that L. filans is most probably 

 identical with L. marginatus, but he includes Latham's slug under this name as well 

 as Hoy's, and in the column immediately before refers to Hoy's spinning slug as 



L. agrestis. 



