50 AXTRICVLTDJE. 



Pedipes (le Pi6tin), Sow.jim., Conch. Man. ed. ii. p. 219. 



Gray in Syn. Cont. Brit. Mus. 1842, p. 91, et in Proc. Zool. 

 Soc. 1847, p. 195. 



Herrmannsen, Ind. Gen. Maine, ii. p. 225, Suppl. p. 102. 



Clark in Ann. $ Mag. N. H 2 sex. vii. p. 472. 



Fhilippi, Handb. d. Conch, p. 253. 



Pfeiffer in Zeitschr.f. Malah. 1853, pp. 5, 9 ; Malah. Bl. 1854, 

 p. 148 ; Mon. Auric, p. 65. 



H. and A. Adams in Proc. Zool. Soc. 1854, p. 36 ; Gen. rec. 

 Moll. ii. p. 248. 

 Carassa, Gistel, Naturg. p. 169. 

 Helix, sp., Schrot., Gmel., Dillu:, Wood. 

 Bulimus, sp., Brag. 

 Polydonta, sp., Fischer. 

 Tornatella, sp., Lam. 

 Turbo, sp., 3Iiihlf. 

 Auricula, sp., Gray, olim, Peeve. 



Although this genus was very exactly observed, named, and 

 perfectly described by Adanson, it was neglected and confounded 

 with various genera by the subsequent writers, until Ferussac 

 first restored it to its due rank, and then most recent authors 

 adopted it. It is nearly allied to Melampus both by the animal 

 and shell, although easily distinguished by the formation of 

 the foot, and belongs certainly to the amphibious or marine 

 Aurieulidee. 



The first species was detected by Adanson in the holes of 

 rocks which were most exposed to the raging of the sea round 

 the Isle of Goree in Senegambia; and several other species 

 have been found in similar localities in various regions. Adan- 

 son's description is very exact ; but he proposes the question, if 

 Lister's figure (t. 577. f. 32. representing the Scarahus plicatus 

 of Ferussac) might not be the same species. By this question, 

 and by the singular formation of the mouth in Adanson's mag- 

 nified figure, Chemnitz was induced to quote it as a synonym of 

 Helix Scaraoceus, Linn. Schroter first mentioned the Pedipes of 

 Adanson as a distinct species of Helix, to which Gmelin gave 

 the name of Helix afro. Bruguiere ascribed it to Bulimus; 

 Lamarck to Tornatella. Ferussac placed the genus Pedipes 

 among the family Aurieulidee, and enumerated four species. In 

 the same family (only under different names) it was adopted 

 by most recent authors. 



Blainville adopted Adanson's genus, but in a different signifi- 

 cation, regarding Tornatella and Conovulus of Lamarck as sub- 

 genera of it. However, in the Supplement to his ' Malacology,' 

 he separated 'Tornatella (being an operculated genus) from it. 



