LTMACID^E. 187 



Section MEGAPELTA, Morch, 1857. 



Mantle covering more than half the body. (H. and A. Adams' 

 " Genera.") 



The above is the only diagnosis given. Morch himself subse- 

 quently referred the animal with doubt to Ariolimax. Dr. 

 Fischer remarks that it approaches Krynickia closely. As the 

 genus is founded on a drawing only, its characters are scarcely 

 capable of description. 



Genus AMALIA, Moqnin-Tandon, 1855. 



Strongly carinated from shield to tail ; shield granular, trun- 

 cate or emarginate behind, with a median subcircular sulcus ; 

 shell-plate with median (instead of lateral) nucleus. Animal 

 sluggish (whilst Limax is lively). Central tooth of the radula 

 three-pointed ; laterals also three-pointed (PI. 44, fig. 3). Milax, 

 Gray, is a synonym. 



The length of the carina, form and sulcus of the shield, posi- 

 tion of the shell-apex, dentition, and sluggish habit distinguish 

 Amalia from Limax. The subgenera Tandonia and Pirainea, 

 Lessona and Pollonera, founded on very slight anatomical differ- 

 ences, may be considered synonyms. 



Aspidiporus, Fitzinger (1883), a Limax having a perforated 

 mantle is a malformed Amalia, according to Heynemann, who 

 has recently (1884), examined the original type. 



Section SANSANIA, Bourguignat, 1877. 



Is characterized by its shell plate with a triangular emargina- 

 tion ; nucleus on the median line. Limax Larteti. Dupuy, fossil 

 (PI. 45, fig. 25), Sansan, France. 



A character of so variable a nature as the interior shell-plate 

 of a snail, can scarcely be maintained as having any value. The 

 plate in the recent Amalia sicula partakes of this character. 

 Palizzolia, Bourg., 1877, differs scarcely at all from Sansania. 



Section GIGANTOMILAX, Bottger, 1883. 

 Shield not sulcate, smooth, not emarginate behind. 



Section EUMILAX, Bottger, 1881. 



Respiratory orifice anterior to the middle of the right margin 

 of the shield. 



