HELIX §. 23. 115 



superne plicata, pallide cornea, rufo niaculata; spira parum 

 elevata; sutura impressa; anfr. 7 angustissimi, convexiusculi, 

 ultimus non descendens, superne carinatus, basi convexus, 

 sublaevigatus; apertura obliqua, lunalo-rotundata ; perist. siin- 

 plex, rectum , marginibus conniventibus, columellari non re- 

 flexo. — Diam. maj. Gy^, min. fere 6, alt. ^y^ mill. (Mus. 

 Cuming. ) 



Helix semiplicata Pfr. in Zeitschr. f. Malak. 1852. p. 63. 



— — Chemn. ed. 11. Helix N. 1083. t. 159. f. 2 4 — 2 6. 



— Gueriniana (Eurompliala) Lowe Diagn. Not. p. 115. N. 17. 

 Habitat in insula Madera. 



537. H. retcxta Shuttleworth. 



T. perspective umbilicata, depressa, arctispira, rufescens, 

 pallide maculata, superne subtiliter costulata; spira convexa; 

 anfr. 6 convexiusculi, ultimus angulatus, subtus laevis, nitidus; 

 sutura albido-marginata; apertura obliqua, subcircularis, non 

 descendens; perist. rectum, simplex, acutum. — Diam. maj. 

 7, min. 6, alt. ^% mill. (Coll. Nr. 232^2.) 



Helix retexta Shuttl. Diagn. n. Moll. N. 1. p. 5. 

 Habitat in insula Palma, Canariensi (Blauner). 



Obs. aH. engonatae valde affinis, anfr. ultimo laeviusculo, nitido, 

 absque anguli circa uinbilicum vesfigio, et sutura marginata distincta. 

 H. Guerini Lowe , ex Madera, etiam affinis, sed sculptura, latiludine et 

 forsan anfr. numero ditTert. » 



538. H. clathratula Pfr. 



T. late umbilicata, lenticularis, acute carinata, superne 

 liris elevatis (in quovis anfractu 2) et costis distinctis clathrata, 

 parum nitens, cornea; spira parum elevata, vertice obtusius- 

 culo; anfr. 5 subaequales, vix convexiusculi, ultimus basi ra- 

 diato-striatus, circa umbiiicum subinflatus; apertura verticalis, 

 angusta. angulato-lunaris; perist. simplex, rectum, acutum. — 

 Diam. maj. 5^^, min. 3, alt. 2% mill. (Coll. Nr. 233.) 

 Helix clathratula Pfr. in Zeitschr. f. Malak. 1850. p. 67. 



— — Chemn. ed. n. Helix N. 803. t. 127. f. 17 — 20. 

 Habitat . . .? 



539. Argonautula Wcbb ct Berth. •}• Mon. I. p. i25. 



.540. Parlatoris Biv. (CoU. 234, — Fruticicola Alb. 



p. 7 1.) - - - 126. 



541. H. latens Lowe. 



T. anguste umbilicata, depressa, tenuissima, rugulosa, pi- 

 losa, olivaceo-cornea, integumento nigricante fere omnino ob- 



8* 



