HELIX §. 84. 251 



1470. H. Thyreus Benson. -f 



T. profunde umbilicata, sinistrorsa, depressa, orbiculata, 

 supra cereo-cornea, oblique radiatim plicato-striata , striis spi- 

 ralibus exilissimis decussata, subtus convexa, polita, radiato- 

 striata, fuscescente-cornea, infra carinam breviter saturatior; 

 spira convexiuscula, apice planato; anfr. 4^^ convexiusculi, 

 lente accrescentes, ultimus obtuse carinatus, non descendens; 

 apertura obliqua, lunata , intus livide purpurea, margine ex- 

 pansiusculo, reflexiusculo , columellari breviter recte descen- 

 dente cum basali angulum etformante. — Diam. maj. 34, min. 

 29, alt. 16 mill. (B.) 



Helix Thyreus Benson in Ann. and Mag. 2d. ser. IX. 1852. 

 p. 405. 



— — Reeve Conch. ic. N. 735. t. 123. 



Habitat in India Australi (Jerdon). 



Obs. Umbilicus, etsi mediocris, peculiariter profundus et distinctus 

 est, ostendens, uti H. quaesita Desh., omnes anfractus usque ad apicem. 



1471. H. avus Pfr. 



T. umbilicata , depressa, solida, oblique striatula, nitidula, 

 pallide fulva; spira brevis, convexa; sutura levis; anfr. 4 vix 

 convexiusculi, sensim accrescentes, ultimus carinatus, utrinque 

 convexior, fascia fusca ad suturam et albida ad carinam or- 

 natus, basi pallidus, circa umbilicum mediocrem, conicum sub- 

 compressus; apertura vix obliqua, subtriangulari-lunaris; perist. 

 crassum, album, expansum et reflexum, marginibus remotis, 

 callo crasso junctis. — Diam. maj. 37, min. 31, alt. 18 mill. 

 (Mus. Cuming.) 



Helix avus Pfr. in Proc. Zool. Soc 1852. 



— — Reeve Conch. ic. N. 658. t. 114. 



— — Chemn. ed. II. Helix N. 1066. t. 157. f. 12 — 14. 

 Habitat in insulis Philippinis. 



* 



1472. Borni Chemn. (Coll. 793. — Chemn. ed. nov. 



I. p. 63. — Desh. 1. c. p. 374. N. 4 43. — Reeve 

 N. 204. t. 44. — Caracolla Alb. p. 120. — Ex- 

 cludantur .synonyma Bornii et Orbignyi.) .... Mon. I. p. 391. 



1473. serpens Spix. (Coll. 794. — Desh. 1. c. p. 65. 



N. 86. t. 62 A. f. 8—10. — Reeve N. 537. t. 98. 

 — Solaropsis Alb. p. 127. — H. pellis serpentis 

 var. Chenu t. 8. f. 4.) - - - 391. 



1474. lanx Fer. (Goll. 795. — Desh. 1. c. p. 357. N. 



423. — Reeve N. 171. t. 38. — Ampelita Alb. 



p. 128.) - -- 392. 



1475. Lamarei IHenke. ( Chcinn. ed. II. Helix N. 753. 



t. 123. f. 22—24.) - - - 392 



