92 CURRENT LITERATURE. 



A Catalogue of the Slugs of the British Isles. (Brit. Nat., Aug.-Sept., 

 1892.) 



A number of new species and varieties are here introduced to the public for 

 the first time, thus in the genus Arion four names quite unfamiliar to British con- 

 chologists appear. The first A. lusitanicus, Mab., resembles externally our large 

 A. ata- or A. empiricorum as Mr. Collinge calls it, but it is quite distinct 

 anatomically, and is more closely related to A. subfuscus. A. coltianus, Poll., the 

 second addition, is allied to A. hortcnsis. Both of them are South European 

 forms, and it is interesting to find them ranging so far north. A. cellicus, Boll., 

 may, according to Mr. Collinge, eventually prove to be only a variety of 

 A. hortensis, but a fourth new species, A. ambiguus, Poll., seems to have better 

 claims to rank as a distinct form. Linia.x cinerea-niger is relegated, as it ought 

 to be, to the varieties of L. maximus, and /.. tenellus, of which no British 

 specimen has been seen by anyone but the late Mr. Alder, is printed in italics, so 

 as to denote its being doubtfully native, and it will presumably altogether dis- 

 appear in Mr. Collinge's next catalogue. — K. F. S. 



A Revised List of the Species of British Slugs. (Ty. Conch., p. 66, 

 1892.) 



Prior to the time (1885-6) when Mr. T. D. A. Cockerell commenced to study 

 our British Slugs, little or nothing had been done in this country upon so 

 important a group, in fact they had not previously received any continued and 

 systematic treatment at the hands of a British malacologist. Naturally, there- 

 fore, we look with some interest to a revised list from Mr. Cockerell. After what 

 he has written elsewhere we are really puzzled to understand many of his 

 revisions, but he hopes " in due course to set forth all these in full," and we look 

 forward with much interest for an explanation of the following points. 



(1) The three species of Teslacella being printed in italics, would lead one to 

 suppose that their claim to rank as British or as valid species was doubtful ! 

 (2) Limax ctnerec-niger, Wolf, is retained as a species ! Why? (3) Agriolimax 

 . Mull., is omitted from the list altogether. (4) Amalia flumbea, Moq., 

 1855. is introduced as a sub-species. If there are any points of importance about 

 this form that are worthy of special note, other than as a variety, it should be 

 raised to specific rank, but until they are described (we know of none) we cannot 

 do otherwise than regard it as a mere colour variation. The method of giving 

 authorities for genera and species will puzzle a many. The term " genitalia " is 

 objectionable. — W. E. C. 



Since the above was put up in type we have learnt that this list was sent to the 

 ConcholoLncal Society of Leeds, on Dec. 18th, 1890. Mr. Cockerell has more 

 patience than most authors, if he can wait two years for publication. 



Limax filans, Hoy. (Brit. Nat., p. 232, 1892.) 



Mr. T. D. A. Cockerell cites the synonymy of this slug, which has hitherto 

 evidently been a puzzle to a many conchologists. Most writers seem to have regarded 

 it as a variety of Agriolimax agrestis, but Mr. Cockerell thinks that there can be no 

 doubt but that it is a synonym of Limax marginatus, Midler. 



Note on Cytherea convexa, Say. (Naut., p. 52, 1892.) W. II. Dall. 



Observations on the Helices of New Zealand. (Naut., p. 54, 1892.) 

 Henry A. Pilsbry. 



The Classification of Lammellibranchs. (Zool. Anz., xv, p. 370, 1892.) 

 Carl Grobben. 



NEW GENERA AND SPECIES. 



Hyalinea laeviuscula. (Naut., p. 53, 1892.) 



Dr. Sterki describes a new species of Hyalinia — or more correctly speaking, 

 the shell of one— from the fine drift of the Guadalupe River, at New Braunfels, 

 Texas. It is of the size and general appearance of Hy. minuscula, but is more 



