— DH) 2— 
173. Helix stylodon Pfr, — T. imperforata, depressius- 
cula, solidula, luteo-cornea, striis incrementi confertissimis et 
concentricis minutissime decussata; spira vix elevata; anfr. 6 pla- 
niusculis, ultimo obtuse angulato: apertura lunari; columella dente 
obliquo, valido instructa; perist. simplice. 
Diam. 24, altit. 8'/, mill. — Pondichery. — An specimen 
adultum? 
174. Helix tenera Si Proc. zool. soc. 1840. p. 102. — 
T. imperforata, subglobosa, tenui, lavi, subhyalina, alba, fasciis 
nigricantibus et viridibus ornata: spira depresso-conoidea; anfr. 
4'/, convexiusculis; columella subrecta, tenui, subexcavata; aper- 
tura lunato-rotundata; perist. simplice, parum expanso. 
Diam. 25, altit. 20 mill. — Rat, anfr. — 2: 3. — Ins. Min- 
doro (Sow.), Tablas. (Cum.) 
Differt ab H. ignobili, cui affinis, spira breviore, anfractibus 
convexioribus et. peristomate. 
175. Helix tessellata MIf, Ant. p. 36, — Eyryomphala 
monile Beck p. 8. (teste Anton in litt.) — T. umbilicata , discoidea, 
utrinque plana, tenui, pallide cornea, strigis angustis undatis 
rufis picta; anfr. 6 angustissimis, ultimo subtus subinflato; um- 
bilico mediocri, pervio; apertura lunato-rotundata; perist. simplice- 
Diam. 4, altit. 2 mill. — Ins. Juan Fernandez. (E collectione 
Antoniana.) 
176. Helix Thersites (Carocolla) Brod. Proc. zool. soc. 
1841. p. 38. — T. imperforata, subcomplanata, gibba, tenui, sub- 
diaphana, sulphuréa, castaneo-fasciata; spira parum elata; sutura 
lineari; anfr. 4'/, planiusculis, ultimo non deflexo, acute carinato, 
prope aperturam subito rotundato, gibbo; apertura subhorizontali, 
semiovali; perist. simplice, late expanso, 
Diam. 23, altit. 14 mill. — Rat. anfr. — 7 : 12. — Insula 
Mindoro. . (Cuming.) 
177. Helix trochiformis (Helicella) Fér. pr. 301. — Caroc. 
circumdata MIf. Ant. p. 40, — T. umbilicata, solida, trochiformi, 
apice obtusa, basi plana, acute carinata, oblique rugosa, saturate 
rufa vel fusco-lutea; anfr. 6 supra carinam prominentem strami- 
neam convexis; umbilico angusto, pervio; apertura irregulariter 
rhombea; perist. subreflexo, margine columellari recte descendente, 
versus umbilicum expanso. 
Diam, 16, altit, 9'/, mill. — Isle de France (Fér.), Taheiti 
(Cuming.), Opara (Ant.). 
178. Helix turbinoides Brod. Proc. zool. soc. 1840, p. 123. 
— Chromocochlea turb. Hartm. V. p. 139. t. 41. — T. imperforata, 
conico-globosa, lineis incrementi oblique striata, viridi, fasciis 
