48 THE NAUTILUS. 



Phenacarion being very properly suppressed. Prophysaon paeificum 

 is referred to P. andersoni, a proceeding I had not expected, but 

 which is probably correct. In this case P. andersoni v. paeificum 

 will be the name of the yellow variety, the type being greyish a 

 dichroism like that offered by the European Arion subfusciis Drap. 

 A more perplexing question relates to the probable identity of P. 

 hum-He and fasciatum. These slugs are practically alike, except that 

 the former has the jaw striate, while in the latter it is plicate or rib- 

 bed. It appears that they occur together at Seattle, so it is hard to 

 consider the difference as due to anything but variation ; yet it is 

 certainly a curious case. In Philomycns such differences appear to 

 have specific value. 



Phenacarion hewphilli W. G. B., is provisionally regarded as a 

 synonym ofProph.foliolatum. It is probably a variety distinguished 

 bv having yellow slime covering the body. Arion snbfuscus has 

 such a form, which is quite distinct from the one having a yellow 

 skin, as in P. pacific um. 



While the authors had a considerable amount of material at their 

 disposal, it is evident that the region occupied by these slugs has by 

 no means been adequately searched. Not only may it he possible 

 to define several subspecies or races of Prop h. andersoni, but further 

 new species, and even genera, may be discovered. Anadenulus is 

 still only known from one locality, where it was found by Hemphill, 

 and the distribution of most of the species is quite limited ; so there 

 is plenty of room for striking novelties in those parts of the Pacific 

 coast region where the foot of the sluggist has never trod. 



In the East, those who will hunt in gardens and greenhouses 

 ought surely to turn up some of the European species of Arion, in 

 addition to A. hortensis. T. D. A. Cocker ell. 



DESCRIPTION OF TEN NEW SPECIES OF TERRESTRIAL MOL- 

 LUSCA FROM SOUTH AFRICA. 2 By James Cosmo Melvill and John 

 Henry Ponsonby. The new species of this installment are mainly 

 Enneas. A new Dorcasia, D. isomerioides, is described, the new 

 subgenus Tulbaghinia being instituted for it. Another Achatinn 

 is described. The richness of the fauna of South Africa, made 

 known through the researches of Messrs. Melvill and Ponsonby, is 

 remarkable. 



-Annals and Magazine of N. H., Jan. 1898. 



