20(3 IIELIX §. 107. 108. 



superne in laminam triangularem reflexo. — Diam. maj. 9, 

 min. 7, alt. 7 mill. (Mus. Cuming.) 



Helix singularis Pfr. in Proc Zool. Soc. 1854. p. 290. 



— — Reeve Conch. ic. n. H07. t. 200. 



— — (Geotrochus) Pfr. Vers. p. 145. 



Habitat in insula Aneiteum Novarum Hebridarum (Macgillivray). 



Obs. Conf. H. sinistrorsa (Bulimus) Desh. in §. 108, nec non //. 

 Sachalensis Pfr. var. 



§. 108. 

 1641. H. TrailH Pfr. 



T. umbilicata, conica, solida, oblique confertim plicata, 

 castaneo-fulvida ; spira conica, apice obtusula; anfr. 5 convexi, 

 ultimus fascia peripherica et area lata basali luteis ornatus, 

 antico vix desccndens ; aportura diagonalis, truncato-ovaiis, 

 intus coeruleo-albida ; perist. fuscum, expansum et reflexius- 

 culum, marginibus subconniventibus, columellari brevi, albo, 

 late reflexo, umbilicam angustum fere tegente. — Diam. maj. 54, 

 min. 43, alt. 37 mill. (Mus. Cuming.) 



Helix Trailli Pfr. in Proc. Zool. Soc. 1855. p. 107. t. 32. f. 4. 



— — (Gamaena) Pfr. Vers. p. 138. 



Habitat «Palawan Passage» prope Borneo (Dr. Traill, II. E. 1. C.) 



* * - 

 1642. H. euchroes Pfr. 



T. seraiobtecte perforata, conica, solidula, oblique irre- 

 gulariler striata et sub lente minutissime granulata, nitidula, 

 rubello-fulva, fasciis castaneis et unica latiore candida ad su- 

 turam ornata; spira regulariter conica, sursum lilaceo-rosea, 

 apice acutiuscula; anfract. 7 modice convexi, sensim accre- 

 scentes, ultimus non descendens, subrolundatus; apertura per- 

 obliqua, subrhombco-lunaris, intus griseo-albida; perist. tenue, 

 extus castaneum, marginibus callo tcnui junctis, dextro late 

 expanso et reflexiusculo , basali substricto, reflexo, cum colu- 

 mellari verticali, leviter arcuato, in larainam triangularem (per~ 

 forationera semitegentem) dilatato angulum formante. — Diam. 

 maj. 36, min. 28, alt. 35 mill. (CoII. Gruner.) 

 Helix euchroes Pfr. in Malak. Bl. I. 1854. p. 57. 



— — Reeve Conch. ic. n. 1346. t. 192. 



— — Pfr. Novit. conch. I. p. 2. n. 3. l. 1. f. 7. 8. 



— — (Geotrochus) Pfr. Vers. p. 145. 



Acavus euchrocs (Geotrocluis) H. ct A. Adams Gen. II. p. 196. 

 SIa!)itat in Archipelago indico leste Verreaux. 



