4 ACHATINA. 



Link explicitly places Achatina Lam. in the synonymy of his 

 group, and the first species of his list is A. achatina; there 

 seems, therefore, to be no escape from the conclusion that 

 Achatium is an absolute synonym of Achatina. The follow- 

 ing species are included: 



A. elegans Link (= A. achatina L., young) . 



A. zebra Link (=A. zebra Brug.). 



A. virginicum Link (Liguus virgineus L.). 



A. fasciatum Link (=Liguus fasciatus L.). 



A. perversum Link (== Amphidromus perversus L.). 



The generic name Achatinus first occurs on p. 418 of 

 Montfort's work, under a figure evidently drawn from A. 

 panthera. On the next page the type is stated to be A. 

 zebra; and on p. 420 Montfort writes: "C'est a de Lamarck 

 que Ton doit 1'etablissement du genre agathine." Since 

 Achatinus has page-priority for A. panthera, and is ad- 

 mitted to be identical with Lamarck's genus, I consider it 

 a synonym, and not available for the South African group 

 herein eliminated from Achatina. Pfeiffer has considered 

 Achatinus to pertain to the typical section of Achatina. 



Cochlitoma Ferussac comprised species of Atopocochlis, 

 Perideris, Corona, Liguus, and Achatince of the A. achatina, 

 zebra and bicarinata groups. No type for Cochlitoma has 

 been selected, so far as I can learn. It has been considered 

 a synonym of Achatina by all recent authors. After the 

 elimination of species belonging to the genera mentioned 

 above, there remains one which I propose to select as type 

 of Cochlitoma. 



Oncaea of Gistel was proposed as a substitute for the 

 name Achatina, with the remark, "Der Farbenajne Acliatina 

 musste geandert werden." It becomes, therefore, an abso- 

 lute synonym of Achatina. Oncaea contained the following 

 species: 0. perdix, 0. purpurea, O. virginea [Liguus], 

 0. crenata, 0. marginata, 0. pallida [=Cochlicopaf]. Of 

 these, 0. crenata and marginata are new species, not iden- 

 tifiable from the descriptions. 



Archachatina Albers was proposed for the typical group 

 of Achatina, with a list of species comprising forms of the 



