64 GASTEROPODA. HELICIDZ. 
last-mentioned locality, it has a general tendency to be more or 
less turrited. I obtained one specimen that rather exceeds an 
inch in height. 
Genus 27. Pomaria. 
Pomatia, Plinii. 
Testa solida, subglobosa, inzequilateralis. Apertura magna 
rotundato-lunata. Peritrema crassius; posticé nullum. Ani- 
mal verrucosum. Tentacula mediocria, ad apicem globoso- 
dilatata. Oculi minimi, posticé inserti. Epiphragma creta- 
ceum. 
Shell solid, subglobose, imequilateral. Aperture large, 
rounded-lunate. Peritreme thick, wanting behind. Animal 
verrucated. Tentacula of moderate length, dilated globosely 
at their extremities. Eyes very small, inserted at the posterior 
edge of the dilatation of the tentacula. 
The epiphragm is composed of chalky matter, and has been 
described as the animal’s operculum. 
The name Pomatia is derived from Hwparias, the term ap- 
pled to it by Dioscorides, 6. 1. cap. 2, from wpa, opercu- 
lum, and not from Pomum, as some of our writers suppose, 
when they call it the Apple Snail. 
1. PomatTiA ANTIQUORUM. 
P. testa ventricosa, rufescente, obsolete fasciata, peritremate 
brunneo-violascente. 
Helix Pomatia, Linn. Syst. Nat. xii. i. 1244 ; Penn. Brit. Zool. 
iv. 134. t. 84. fig. 128; Mont. Test. Brit. 134. t. 84. fig. 
128; Drap. Hist. des Moll. 87. pl. 5. fig. 20; M. & &. 
Trans. Linn. Soc. viii. 201; Flem. Edinb. Encyel. vii. 79 ; 
Dill. Desc. Cat. 920; Turt. Conch. Dict. 56; Féruss. H. N. 
des Moll. pl. 21. 
Habitat in cretaceis satis frequens. 
Testa anfractibus longitudinaliter, tenuissimé, transversim for- 
tius striolatis. 
Animal supra griseo-cinereum, subolivaceo-lutescens, ferrugi- 
neo-subcroceum aut sordidé testaceum. Sculpture interstitia 
olivaceo-fusca, nigricantia aut czerulescente-grisea. Pallii 
margo concolor aut pallidior, Latera nonnunquam nigro 
— > 
