COCKERELL AND COLLINGE : CHECK-LIST OF SLUGS. 27 



120 d. tristis. Moquin-Tandon describes his slug as banded, which 

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

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



120^. typicns. I have used the name for the ordinary immaculate 

 forms, not necessarily within the strict definition of typiis, 

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

 it was first used by Roebuck as an amended form of 

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

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

 J. 0/ Couch., 1884, p. 252." 



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

 Mr. Butterell described it under the same name. 



120 /. albidus, Pic, typiis, L. & P., and cineraccus, Moq., are but 

 slight modifications of the grey inmiaculate form. So 

 also albitcntaculatus. 



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

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

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

 seems only a further modification of the same type. 



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

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

 spots become darker and more distinct with the interstices 

 of the rug£e usually darkened, we have reticulatus, Miill. 



120 /. X. veranyaniis a.n6. putictatus dcct practically equivalent it would 

 seem. 



120 a\ b\ 2'arians and syivaticus. Moq., are almost precisely the 

 same. Draparnaud's syivaticus is something altogether 

 different. 



120^.^'. melanocephalus, Moq. (not A. fnelanocephalus, Kal.), is 

 practically identical with atritentaculatus. 



120^'. molestus, 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. Moil.) states that 

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

 to identify molestus with any particular mutation. 



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

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

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

 W. E. C. 



