HELIX §. 20. 103 
convexus; apertura ovalis, angusta; perist. subreflexuni, — Diam. 
12, ait. 5 lin. (L.) 
Helix discoides Less. voy. de Ia Coq. p. 3 1 0. 
Habitat in Nova Hibernia, 
Oi)s. «Affinis H. solitariae.» (Less.) — Vciosimililer alio loco collocanda. 
25S. H. papillata PfV. 
T. umbilicata, depressa, subdiscoidea , solidiuscula , irregu- 
laritor striata, opaca, albida, spadiceo- nebulosa saturatiusque 
strigata et maculata; spira plana, apice papillatim prominente; 
anfr. 5 planiusculi, ulliinus descendens, depresso-rolundatus; 
umbilicus angustus, pervius; apertura obliqua, lunalo-subcircu- 
laris; perist. simplex, acutum, margine columellari vix dilatato. 
— Diam. maj. 23, niin. 20y2, ait. 11 mill. (Mus. Cuming.) 
Helix papillata Pfr, in Proc. Zool. Soc. 1845. p. 129. 
Habitat ? 
Obs. Similis H. Menkeanae Nr. 112. 
259- H. sudcnsis Pft*. 
T. umbilicata, depressa, regulariter et confertim costulata, 
tenuis, diaphana, rubello-coriica; spira vix elevata; anfr. 6 con- 
vexi, ultimus non descendens; umbilicus majusculus, perspecti- 
vus; apertura rotuudato-Iunaris; perist. simplex, acutura, margine 
columellari vix dilatato, breviter patente. — Diam. maj. 13, min. 
Iiyii, ait. 7 mill. (Coli. Forbes.) 
Helix sudensis Pfr. Symb. EI. p. 67. 
Habitat rarissima prope Suda Candiae, (Forb.) 
260. H. Frivaldskyana RossmStssler. q* 
T. perspective umbilicata, lenticulari-depressa, arctispira, 
obtuse carinata, albido -straminea, subtiliter costulato-striata ; 
anfr. 5 convexi; aperlm‘a oblique lunaris; perist. rectum, acutum, 
simplex. — Diam. maj. 9, min. 8, ait. 3% mill. (llm.) 
Helix Frivaldskyana Rossm. XI. p. 3. f. 691. 
— convexa (Ilelicella) Fer. pr. 209. Hist. t. 82. f. 1 ! Ncc Rafin. 
Habitat in Rumelia (Friv.), prope Barulh (Oli vier, Fer.) 
261. H. perspectiva Say. 
T. late et perspective umbilicata, orbicularis, superne vix 
convexiuscula, subtus excavata, tenuis, rufo-cornea, regulariter 
costulata; anfr. 6ya convexiusculi , lente accrescentes; apertura 
parva, lunato-subcircularis; perist. simplex, acutum, marginil>us 
