PULMONATA. 145 



four and a half to five, nearly level, the last slightly keeled, 

 browu-banded beneath the keel, tumid beneath ; aperture 

 rounded-lunar ; peristome simple, acute, columellar margin 

 slightly descending, reflected. Lat. maj. 30, min. 25, alt. 15 mill. 



Helix Himalana, Lea, Obs. i. 167. t. \9. f. 66. 



Helix Himalayana, Benson in Zool. Journ. v. (1835) 461. 



Pfr. Mon. Helic. i. 63. 



Reeve, Icon. n. 389. t. 75. 

 Ariophanta Himalayana, Beck, Ind. p. 5. n. 5. 

 Nanina (Ariophanta) Himalajana, Alb. Helic. 62. 

 Hab. Himalaya. 



5. Ariophanta retrorsa. 



Shell perforated, sinistral, somewhat lenticular, rather thin, 

 with impressed subspiral lines and very fine wavy and confluent 

 wrinkles, pale chestnut or yellow-brown ; spire scarcely elevated, 

 apex rather acute ; whorls five and a half, rapidly increasing, 

 very slightly convex, the last acutely keeled, gibbous beneath ; 

 apertm-e rounded-lunar ; peristome simple, columellar margin 

 not reflected. Lat. maj. 44, min. 35, alt. 20 mill. 



Helix (CarocoUa) retrorsa, Gould, Bost. Journ. iv. 455. t. 24. f. 4. 

 Helix retrorsa, Pfr. Mon. Helic. i. 76 ; iii. n. 284. 

 Chemn. ed. 2, Helix, n. 686. t. 110. f. 4-6. 

 Nanina retrorsa, Troschel, Wiegm. Arch. 1849, i. 234. t. 4. f. 6. 

 Nanina (Ariophanta) retrorsa, Albers, Heliceen, 62. 

 Hab. Bu-mah. 



6. Ariophanta Janus. B.M. 



Shell perforated, sinistral, orbicular, thin, diaphanous, obliquely 

 regularly and closely costulate-striated, brown above, convex 

 beneath, reddish-chestnut, rather bright ; spire widely conoidallv- 

 depressed ; whorls seven, planulate, the last keeled ; aperture 

 lunar ; peristome thin, acute, columellar margin slightly reflected. 

 Lat. maj. 36, min. 31, alt. 17 mill. 



Hehx Janus bifrons, Chemn. xi. 307. t. 213. f. 3016, 3017. 



(Helicella), Fer. Pr. 233. 

 Hehx Janus, Pfr. Proc. Zool. Soc. 1842, p. SJ ; Mon. Helic. i. 77; 

 Symb. ii. 19 ; Ic. i. 88. 



Chemn. ed. 2, Helix, n. 59. t. 1 1. f. 4-6. 



Reeve, Icon. 494. t. 91. 



Hombr. ^ Jacq. Voy. Pol Sud, Moll. t. 5. f. 1-3. 

 Hehx Mackensii, Soiileyet in Voy. Bonite, Moll. t. 28. f. 27-29. 

 Nanina (Ariophanta) Janus, Alb. Helic. 62. 

 Hehx Mackensiana, Soul. Revue Zool. 1841, p. 347. 



H 



