20 



Genus PHYSA, Drapaniaud, 



Plate 1.— Figs. 1—3. 



Testa convoluta, ovata vel oblonga, sinistrorsa: spira 

 exserta: apertura longitudinalis, labrum acutum, labium in 

 anfractum ultimum expansum. 



SYNONYMS AND REFERENCES. 



BuLiNUS, Adanson. Hist. Nat. de Senegal, pi. 1, fig. G2. 

 Bulla, Lin. Gmel. Dillwyn. Planorbis, Mltller. 

 BuLiMUs, Bruguiere, Poiret. 

 Physa, Draparnaud. Hist. Nat. des Moll. ter. et fluv. 



" Lamarck. An. sans vert., vol. viii. p. 398. 

 LiMNEA, SowERBY. Genera of Shells. 



" SowERBY, Jr. A Conchological Manual. 



DESCRIPTION. 



Animal spiral, subglobular or lengthened: 

 head short, flat, rounded, and emargmate in 

 front; mouth provided with lateral lips, and a 

 spoon-shaped tongue: foot rounded, and not 

 much extended in front, but long and pointed 

 posteriorly: tentacles long and slender, and 

 swelling into an auricle at the base: eyes at the 



