SYKES : COLLECTION OK LAND AND FRESH WATER SHELLS. 63 



EXPLAXATIOX OF PLATE III. 



Fig. I. Claiisilia kcltiiituin-iisf. Vi^. 7. Bovsiilin kclaiiiaiicitsc. 



Fig. 2. Rliodiiuj ( :') itiirabilis. Figs. 8, 9, lo.Strcphi.vis colliiii^ci. 



P'igs. 3. 4. I'liilviciplu' clirvscilis. Figs. 11, 12, Alvciuiis kchiiitdiiciisc. 



Figs. 5, 6. Opistlioponis tlaiitzcnbciiii. Figs. 13, 14. Opistliosfoiiia laiiUaici. 



IS AMALIA CARINATA, RISSO, A BRITISH SLUG? 



Hy WALTER E. COLLI NGE. 



For .some time I have been receiving (in connection with my proposed 

 Monograph on the British Slugs) from various correspondents in 

 different parts of the British Isles, numerous examples of Aiimfia 

 wirerhyi, Fer. Amongst these a specimen collected by Mr. Bromley 

 Peebles, near Birmingham, and two collected by Mr. F. J. Partridge 

 in Devonshire, seemed to differ slightly from the ordinary form. 

 These I have subjected to a rather more careful scrutiny, and have 

 also compared them with Simroth's excellent figure of A. carinafa, 

 Risso,'^' also with the drawings and description of the internal 

 structure of this species, as given by Simroth,'-^' and Lesson and 

 Pollonera.'''' I have now little doubt that these three specimens are not 

 referable to ^1. .•<i)>r('fh;//\ Fer., but are very closely allied, if not identical 

 with, the A. rariuafa of Risso. On comparing them with specimens 

 of this latter species from Algiers, they are scarcely distinguishable 

 from them, excepting in size, the English examples being the smaller. 



Aiiialia rnrinafa was described by Risso'^' in 1826, and has by 

 most malacologists been regarded as a valid species. Bourguignat in 

 1862 described a Milax carinatus, and Paulucci in 1888 described a 

 variety fulra of A. manjinafa, both of which have been regarded as 

 synonyms of A. carinata, by Pollonera. 



Externally there are few characters to distinguish A. carinata 

 from A. ■^(itrerhiji, usually, however, it is darker than the typical form 

 of soicerhyi, the mantle is longer, and the groove on the mantle 

 extends further forward, this latter character being well shown in Lesson 

 and PoUonera's figure. 



Whether or not these three specimens are true carinata, and if 

 so, does this species occur generally in this country, remains yet to be 

 proved. With a view to working out this matter, I venture to appeal 

 to malacologists for specimens of dark coloured forms of A. sotverhyi, 

 from any part of the British Isles. 



I. Abhandl. 1. Senckenb. naturf. Gesell., 1891, Bd. xvi, p. 20, T. i, f. 7. 



?. Zeit. f. wis-:. Zool.. 188^, Bd. xlii, p. 228, T. vii, f. xv, T. x, f. xvc, XVD. 



3. Monoe. d. Limacidi Italian!, 1882, T. i, f. 10-12, 30, 31, T. ii, f. 15. 



4. Prod. Europe M^rid., 1826, p. 56. 



