Mr. H. A. Pilsbry on the Oenus Tebennophorus. 185 



cologist that the above description does not indicate TehennO' 

 phorus, a slug in which the genital or2:ans have a common 

 outlet. It cannot be supposed that Blainville has made a 

 mistake in observation, because in the same paper he describes 

 at length the external anatomy of Veronicella^ and correctly 

 locates the orifices. The figure given is equally non- 

 committal ; so much so that Mr. Cockerell (wiio supposes 

 Limacella to equal Tehennophorus) really cites " figures 

 4, 5 " instead of 5 only * — his inability to tell Blainville's 

 figure of Limacella (fig. 5) from that of Veronicella (fig. 4) 

 being evidence enough that the former is not generically 

 recognizable. As to the fact that Mr. Cockerell has found a 

 couple of slugs under the name ^^ Limacella lactescens " in the 

 British Museum, which he supposes are the types of L. lacti- 

 formis^ it is absolutely irrelevant to the subject. What 

 evidence is there beyond the merest guess-work that they are 

 Blainville's types ? And even if they were (a most improbable 

 hypothesis!), their mere existence does not constitute publi- 

 cation. We have nothing to judge Limacella by save the 

 original figures and description, and these certainly indicate a 

 type of slug different from Tehennophorus. 



It may also be noted that the name Limacella is preoccu- 

 pied, having been used by Brard in 1815. If we care to be 

 really consistent we must use Limacella in place of Agrio- 

 limax ! 



The second name for the genus is Philomycus^ Rafinesque. 

 This genus, says its author, " differs from Limax by no visible 

 mantle, the longer pair of tentacula terminal and club-sliaped, 

 the shorter tentacula lateral and oblong." Rafinesque 

 describes four species and says there are many more in the 

 United States. Not one of those he described has been 

 identified with any certainty, and only two species of Tehen- 

 nophorus occur in the regions visited by him. Rafinesque 

 also describes the genus Eumeles — "differs from Limax by no 

 visible mantle, the four tentacula almost in one row in front 

 and cylindrical, nearly equal, the smallest pair between the 

 larger ones." Of this genus he describes two species, one of 

 which, E. nehulosus, has been recognized by Mr. Cockerell, 

 whose penetration and facilities have enabled him to identify 

 new or old species which have escaped the observation of 

 specialists on the American fauna. 



AVe will not comment on these Rafincsquian genera ; those 

 who find slugs corresponding to them should of course use the 



• That this is not mere inadvertence on Mr. Cockerell's part is demon- 

 strated by his remarks on lihiiuville's fig. 4 on p. obO of the ' ^Vnnals ' for 

 ISovember 1890. 



Anil, & May. N. Hist. Ser. 6. Vol. vii. 13 



