GASTEEOPODA. 297 



Distrihution^ 20 species. Europe. Norway, Britain, Spain, 



Poutli Africa. 

 Fossil. Newer Pliocene, Maidstone. (Morris.) 

 Pledropliorus [corninus^ Bosc) Fer. 5 species. Teneriffe ; 



represented as having a small conical shell on the tail ; probably 



an erroneous observation. 



Pahmacella, Cuvier. 



Type^ P. Oliyieri, Cuvier. 



Etymology i parma, a small shield. 



Synonym ? Peltella (Americana), Van Beneden, 



Shell concealedj oblong, nearly flat, apex sub-spiral. 



Animal vitrina-like, with an ample foot, pointed behind, and 

 furnished with a mucus-pore ; mantle small, shield-like in the 

 middle of the back, partly or entirely concealing the shell. 



P. caiyciilata, Sby. (Cryptella, Webb), PL Xll., Fig. 27, is 

 patelliform, with an exposed papillary spire. 



Distribution, 7 species. South Europe, Canary Islands, North 

 India. 



Janella, G-ray, 1850 (not Grat. 1826). 



Synonym^ Athoracophorus (!), Gould. 



Tyjje, Limax bitentaculatus, Quoy. Elongate, limaciform, 

 covered by a mantle with free margins ; back grooved ; tentacles 

 2, retractile, rising within the edge of the mantle ; respiratory 

 orifice to the right of the dorsal groove, reproductive orifice 

 below it and beneath the mantle. 



Distribution, New Zealand, on leaves. 



Akeitea, Gray, 1860. 



Mantle small and triangular, tooth strap with a single median 

 tooth. 



Distribution, 1 species. A. Macdonaldii- New Hebrides, New 

 Caledonia. 



PAEMARIOK, Fischer. 1855. 



SJiell shallow, partly external ; mantle large, with a free 

 margin anteriorly, but covered by the shell posteriorly ; genera- 

 tive orifice behind the right tentacle. 



Distribution, 4 species, India, 



Thibon-iophortts, Humbert, 1863. 



Mantle small, triangular, back with an almost imperceptible 

 furrow ; teeth with wavy edges. 



Distribution, 3 species. New South Wales. 



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