PHOtADID^A. 239 



PHASIANELLA. Lamarck, Euteopta. Humptrey, Gray's 



■ Synopsis. (Phasianus, a pheasant.) Fam. Turbinacea, Lam. 

 EUipsostomata, Bl. — Descr. Smooth, oval, variegated ; aperture 

 entire, oval ; outer-Hp thin ; inner-Up thin, spread over a portion 

 of the body whorl ; columella smooth, rather thickened towards 

 the base ; operculum homy, spiral within ; testaceous, incrassated 

 without. Britain, Mediterranean, &c. ; the fine large species 

 are Australian. Some fossil species are found in the tertiary beds. 

 — Ohs. The shells composing this genus are richly marked with 

 lines and waves of various and delicate colours, and if the genus 

 be restricted to those species which are smooth, and which have 

 a thick shelly operculum, we may regard it as well defined ; but 

 there are some spirally-grooved species of Tuebo, Linn, which; 

 from their oval shape, have been considered as belonging to this 

 genus. Such species should not, in our opinion, be retained in 

 this genus; they belong to Littoriua. P. variegata, PL xvi. fig. 367. 



PHILINE. Ascanias. A sub-genus of BuHidse, the shells of 

 which are thus described by Adams in his Monograph in 

 Sowerby's Thesaurus : " shell concealed in the mantle, thin, 

 involute on one side, destitute of distinct spire or columella ; 

 aperture large and wide." 



PHITIA. Grray. Caetchitjm, Miiller. 



PHOLADAEIA. Lam. A family of the order Conchifera Di- 

 myaria. Lam. The animals contained in this family live in 

 cavities bored by themselves in rocks, wood, &c. They are 

 cylindrical in form. Lamarck here places Pholas and Gtasteo- 

 CH^NA, the last of which belongs more properly to the family 

 of Tubicolaria, where we have enumerated it. Pholas has been 

 divided into Pholas, fig. 55, Martesia, which has the valves nearly 

 closed ; and Pholadidaea, fig. 56, which has the cup-shaped ex- 

 tension. The genus Pholadomya, fig. 67, has been added, although 

 of doubtftd <3haracter. The genus Galeomma, fig. 58, 59, has 

 also been recently added. 



PHOLADIDtEA. Leach. Pholas papyracea, Auct. Eemarkable 

 for the cup-shaped process at the posterior extremity. PI. ii. 

 fig. 56. 



