68 cockerell: revised list of British slugs. 



AGRIOIJMAX Morch, 1868. 



Note. — This genus is now very generally accepted as 

 valid, and its characters have often been pointed out. 



A. agrestis Linn., 1758. 



Note. — Z. hyalinns L., Ed. XII., 1767, is almost 

 certainly the young of agi-estis, and being mentioned first 

 in the twelfth edition would have priority if that edition 

 were taken as the earliest to be quoted for names. In the 

 tenth edition, 1758, there is no hyalinns recorded, but 

 agrestis is duly inserted, and so obtains priority. 



AMALIA Moq., 1855. 



A. gagates (Drap., 1801). Heyn., 1861. 



Subsp. A. plumbea (Moq., 1855). 



Note. — While recently revising the species allied to 

 gagates, I came to the conclusion that in addition to the 

 typical form, we must recognise a northern subspecies 

 equivalent to the \^.r.pluindea of Moquin-Tandon, and some 

 allied forms ; and a southern or Mediterranean subspecies 

 including bedriagce Less. & Poll., and a new form which 

 I have called mediterranea. The typical gagates is rare in 

 Britain. 



A. sowerbyi (Fer., 1823). Heyn. 



Note. — I had adopted the name A. carifiata (Leach, 

 1820) for this species, but it is perhaps better to call it 

 sowerbyi. Leach's work was certainly printed in part in 

 1820, and a bound copy in the British Museum has the 

 description of Z. carinatus on p. 73. It is also certain 

 that a few unbound copies were distributed privately, and 

 Turton and others considered it sufficiently published for 

 quotation. (See, for instance, Turton's 'Manual,' 1831, 

 p. 25.) But the work never appears to have been on sale 

 until Gray reprinted it in 1852. 



J.C, vii., July, 1S92. 



