PULMONATA. 153 



11. ZONITES GEMONENSIS. 



Shell widely umbilicated, orbiculate-convex, keeled, lutescent, 

 above striated, slightly decussated, silky, beneath glabrous, 

 shining ; whorls six, nearly level ; aperture angularly-lunar ; pe- 

 ristome straight, acute, slightly lipped. Lat. maj. 18, min. 1(J, 

 alt. 8 mill. 



HeUx gemonensis, Fer. Pr. 204 ; Hist. t. 80. f. 6. 



Rossm. iii. 3. f. 153. 



Pfr. Mo7i. Helic. i. 129. 



Chemn. ed. 2, Helix, n. 618. t. 96. f. 12-14. 



Desk. Helic. 365. n. 433. 

 Helix isodoma, Jajis, Mantissa, 2. 

 Zonites gemonensis, Beck, hid. 8. 

 Tragomma gemonense. Held in Isis, 1837, p. 916. 

 Zonites, Alb. Helic. 63. 

 Hab. Friulia. 



12. Zonites Cycloplax. 



Shell orbiculate, depressed, decussated above with close-set 

 waving and radiating striae and with spiral strise, granulated, red- 

 dish-brown horn-coloured, with a chestnut peripherical band, 

 more smooth and paler beneath ; spire moderately convex, with 

 the apex rather flattened ; suture indistinct, then impressed ; 

 whorls Ave, flat, the last slightly (when young, sharply) keeled, 

 ililated anteriorly, rather turgid anteriorly near the suture, in- 

 flated beneath ; umbilicus wide ; aperture lunate, somewhat 

 quadi-angular, oblique, sometimes with a slight whitish internal 

 lip; peristome simple, sharp, columellar margin not reflected, 

 forming an obtuse angle with the basal margin. Height 17. 

 greatest breadth 42, least breadth 34 mill. {Benson.) 



Helix Cycloplax, Benson, in Ann. Sf Mag. N. H. ser. 2. x. 348. 



Reeve, Icon. n. . t. 



Pfr. Mon. Suppl. p. 636. 

 Hab. Darjiliug, Sikkim Ilimalayah (Trotter). 



Fam. 5. HELICID^. 



Foot tapering behind, without any subcaudal gland. Body 

 and shell subcentral, dorsal. Teeth numerous, four-sided, close 

 together on the hngual band. Eyes on the toj) of the upper 

 elongated retractile tentacles ; lower tentacles smaller, rarely 

 wanting. 



H 5 



