COCKERELL AND COLLINGE : CHECK-LIST OF SLUGS. 201 



1 20 d. tnstis. Moquin-Tandon describes his slug as banded, which 



• seems to indicate that it may not be agrestis. If so, the 



form recognised as iristis in England will want a new name. 



\2o g. typicus. I have used the name for the ordinary immaculate 

 forms, not necessarily within the strict definition of typus, 

 L. and P. I did not originate the name, and believe 

 it was first used by Roebuck as an amended form of 

 typus, or by error for Lessona and Pollonera's term. Thus, 

 Roebuck cites it as " typica " of Less, and Poll, in 

 J. of Conch., 1884, p. 252. n 



120/1. niger, Morelet. I have not seen Morelet's description; 

 Mr. Butterell described it under the same name. 



120 i. albidus, Pic, typus, L. & P., and cineraceus, Moq., are but 

 slight modifications of the grey immaculate form. So 

 also albitcntaculatus. 



120 k. I. rufescens, L. & P., is obscurely spotted, but rufescens, D. & M., 

 is immaculate ; q. ornatus, Paul., is probably to be united 

 with rufescens as given by Less. & Poll., and ornatus, Moq., 

 seems only a further modification of the same type. 



120 f.w.s. In the same way, the reddish succineus, Wst, taking 

 brownish spots, becomes obscurus, Moq., and when the 

 spots become darker and more distinct with the interstices 

 of the rugre usually darkened, we have reticu/atus, Mull. 



1 20 /. .v. veranyanus and punctatus are practically equivalent it would 

 seem. 



\zoa.b'. varians and sylvaticus. Moq., are almost precisely the 

 same. Draparnaud's sylvaticus is something altogether 

 different. 



120 0. g\ me/anocep/ia/us, Moq. (not A. nielanoceplia/us, Kal.), is 

 practically identical with atritentaculatus. 



\2oe\ molest us, Hutton. A form of the species found in New 

 Zealand, descended from introduced examples. A speci- 

 men in the British Museum, which I examined, from 

 Dunedin (Otago Univ. Mus.), seemed peculiar in its rather 

 smooth body, its white ground-colour, and its blackish- 

 brown tint above. Hutton {Man. N.Z. Mo//.) states that 

 the slug is quite variable, so that it will hardly be possible 

 to identify molestus with any particular mutation. 



11 This is only another case of the careless manner in which Mr. Roebuck uses the nomen- 

 clature of foreign authors. 1 have always regarded the " typica " of Mr. Roebuck as an error. 

 The above form in such a case should read tyfiicus, Ckll. How can the type be a variety? — 

 W. E. C. 



B 



