IIELIX §. 72. 393 



retlexum, margine supero dilatato. columellari brevi cum basaii 

 augulum obtusum formaute. — R. a. = 1 : 2. — Diam. maj. 38, 

 min. 32 , alt. 14/2 mill. ( Coll. Nr. 622.) 

 Helix Xystera Val. in Mus. Paris. 



— — Pft\ Symb. I. p. 4 1 . 



— — Chemn. ed. II. Hellx N. 346. t. 61. f. 4 — 6. 



— .... Fer. hist. t. 62 A. f. 5 — 7. 



— madagascariensis Encvcl. melh. t. 462. f. 2? 



— lanx Desh. in Enc, melh. II. p. 261. N. ISS^^^^^y^ ■x.'^cu- 

 Carocolla madagascariensis Lam. 10. p. 98. ed. Dh. p.' 147'. 

 Liicerna lanx Swains. Malac. p. 329. 



Habitat in insula Madagascar. 



Obs. Hic conf. H. omphalodes Nr. 972. 



1023. H. unicolor Pfr. 



T, umbilicata, depressa, acute carinata, ienuis, fiisca, su- 

 perne subtiliter striata, subtus lineis nonnuUis spiralibus elevatis 

 munita; spira depresso-conoidea ; anfr. 5 planiusculi, sensim ac- 

 crescentes, ultimus antice non descendens, basi convexus, ad 

 umbilicum angustum abrupte angulatus ; apertura rhomboidea ; 

 perist. saturate fuscum, marginibus callo tenuissimo junctis, supero 

 dilatato, expanso, basali ascendente, stricto, columellari brevi, 

 dilalato, umbilicum semioccultante , cum basali angulatim juncto. 

 — Diam. maj. 32, min. 28, alt. 16 mill. (Mus. Cuming. et Gruner.) 

 Helix unicolor Pfr. in Proc. Zool. Soc. 1 8 45. p. 64. 



— — Chemn. ed. II. Helix N. 345. t. 61. f. 1 — 3. 



Habitat ? 



Obs. Constanter differt ab H. Xyslera umbilico angusto, spira elata, an- 

 fractuum numero elc. 



1024. H. fulgurata Sowerby. 



T. umbilicata , depressa , acute carinata , lineis confertis lon- 

 gitudinalibus et transversis regulariter decussata, nitida, albida, 

 lineis rufis elegantissime fulgurata ; spira subplanata ; anfr. 4 pla- 

 nuli, ultimus subtus fascia unica rufa ornatus, basi inflatus, circa 

 umbilicum anguste infundibuliformem angulatus; apertura sub- 

 triangularis , intus nitida, livida; perist. castaneum, marginibus 

 callo castaneo introrsum diffuso junctis, supero subexpanso , ba- 

 sali reflexo, cum columellari brevi, obliquo angulum obtusum 

 formante. — Diam. maj. 37, min. 30, alt. 'I4V2 miU. (Spec. unic. 

 Mus. Brit. ) 



Helix fulgurata Sow. in Malac. and Conch. mag. I. p. 47. c. tab. 



" — — Pfr. Syrab. IH. p. 79. 



Lucerna fidgurata Sivains. Malac. p. 329. 

 Habitat . . . ? 



