232 COCKERELL AND COLLINGE I CHECK-LIST OF SLUGS. 



Tandon's var. bicoior is sufficiently well marked and described to 

 include all those forms in which there is a dark dorsal surface and 

 lighter sides; in such a case it would include, as well as the forms 

 above mentioned, v. a/bolateralis, Roebuck, and v. scharffi, Ckll. 

 (in 1891 Professor Cockerell classed this as v. bicoior, Moq. See 

 Conchologist, 189 1, i., p. 50). 



Respecting the final suggestion, I will gladly do what I can, by 

 placing the pages of the " Journal of Malacology " at the disposal of 

 all malacologists for open and free discussion of the list. 



I have a suggestion to make myself, which, if other malacologists 

 will help, I will endeavour to carry out. It is very desirable, I think, 

 that we should have a " Register of Original Descriptions," and, if 

 possible, figures, where they exist, of all described slugs and their 

 anatomy. I purpose to commence such a register, which will 

 contain a copy of the original description of every known family, 

 sub-family, section, genus, sub-genus, variety, &c, with reference to 

 the original. These I will place at the disposal of any malacologist 

 by sending copies of any description, on payment of some small fee 

 to cover the cost of clerical expenses. The register, when complete, 

 I may possibly print, and place in some public museum, with a 

 collection of the slugs of the world, which I am bringing together. 

 The descriptions desired at present are all in the foregoing list ; 

 after a time a notice will appear in the "Journal," stating by number 

 and letter what are still wanted. 



In conclusion, I feel sure the publication of this list well merits 

 the grateful thanks of all malacologists, and that it will give a 

 definite impetus to the study of the slugs in this and other countries. 

 I trust the " spirit of confident assertion," &c, is not so rife as 

 Prof. Cockerell thinks, but that we are all open to conviction, and 

 pursuing our studies in a spirit of broad-mindedness, and with "that 

 fanaticism of veracity which is a greater possession than much 

 learning." 



Printed by M c Corquodale & Co. Limited, Leeds. 



