l'HOSI'IIORAX. 



219 



Species of Umax. 



agrestis, Mutt. 

 alpinus, Firus. 

 arboruru, Bouch-Chantr. 

 bilobatus, Ferns. 

 bruuueus, Drop. 

 campestris, Binney. 

 Canadensis, D'Orb. 

 Capensis, Krauss. 

 carinatus, D'Orb. 

 Columbianus, Gould. 

 flavus, Linn. 

 fuliginosus, Gould. 

 gagates, Drop. 



Kraussii, H. and A. Adams 



(campestris, Krauss.). 

 Lartetii, Dupuy. 

 Livonicus, Schrenk. 

 marginatus, Drap. 

 maximus, Linn. 

 megaspidus, Blainv. 

 Natalensis, Krauss. 

 olivaceus, Gould. 

 Sowerbyi, Ferns. 

 sylvaticus, Drap. 

 Sandwichensis, Eyd. 

 tenellus, Mutt. 



Sub-gen. hyalimax, H. and A. Adams. 



Orilice of respiratory aperture in tbe middle of the right side 

 of the mantle ; auimal pellucid. 



perlucidus, Quoy and Gaim. 



Genus PHOSPHORAX, Webb and Bertlielot. 



Animal slug-like. Mantle ending posteriorly in a small, 

 concave, contractile disk surrounded by an elevated border, 

 shining by day and phosphorescent at night. Foot simple. 



Shell internal, in the middle of the mantle, above the res- 

 piratory orifice, thick, white, oval, testaceous, and nearly 

 transparent. 



Ex. P. noctilucus, Ftrussac, pi. 79, fig. 2. 



This curious Slug is found in the Island of Teneriffe under 



