262 
HELIX §. 53. 
Helix Najas Phil. Icon. II. 15. p. 185. Helix t. 9. f. 5. 
“ — Chemn, cd. II. Helix N. 308. t. 53. f. 12. 13. 
Habitat , . . ? (Ex Antillis oriunda dicitur.) 
T. imperforata, depresso-globosa, tenuis, diaphana, subtilis- 
sime striata, coloribus valde varians; sutura linearis, plerumque 
rufo- marginata; anfr. 472 vix convcxiusculi, supremi depressi, 
ultimus subtus inflatus; columella oblique descendens, acuta, sub 
excavata; apertura lunato-rotundata ; perist. simplex , reflexius- 
culum. — R. a. = 4 : 7. — Diam. moj. 32, min. 27, ait. 20 mill. 
(Coli. Nr: 408.) 
Helix intorta Sow. in Proc. Zool. Soc. 1840. p. 1 68. 
— — Reeve Gonch. syst. II. t. 164. f. 10. 
— — Pfr, Symb. II. p. 31. 
— — Deless, rccueil t. 38. f. 7. 
— — Chemn, ed. R. Helix N. 307. t. 53. f. 8 — 1 1. 
Habitat in insulis Bohol, Capul, Negros, Siquijor (Cuming). 
Obs. 1. Variat colore albido, cilrino, roseo, sulphureo vel cinnamomeo. 
fasciis interdum nullis, plerumque 3 pallide rufis vel nigricantibus , perislomato 
albo aut rufo vel roseo-marginalo. (Coiif. var. 12 a Cl. Sowerby i. c. enu- 
meratae.) 
Obs. 2. Persimilis sequenti; differt anfractibus convexioribus, sensim ac- 
crescentibus, ultimo inflato, apertura latcralilcr non dilatata, perist. vix reflexo 
T. imperforata, globoso-depressa, tenuis, diaphana, nitidula, 
minute striata, alba; spira parva, superne depressa; sutura linea- 
ris, superne rufo-marginata; anfr. 4 planiuscuii, ultimus magnus, 
obsolete angulatus; columella declivis, subexcavata; apertura 
lunato-elliplica; perist. simplex, expansum. — R. a. = 1 : 2. — 
Diam. maj. 32, min. 27, ait. 18 mill. (CoU. Nr. 409.) 
Helix Valenciennesii Eyd. in Guerin inag. 1 838. t. 1 1 5. f. 2. 
— — Deless. rccucil i. 38. f. 8. 
_ _ Chemn, ed. II. llelLx N. 304. t. 53. f. 1.2. 
Habitat in insula Capul Philippinaruin (Cuming). 
T. imperforata, depresso-globosa, tenuis, striis incrementi 
validis notata, albida, epidermide pallido cornea, decidua in- 
structa; spira parum elevata, obtusa; sutura linearis, albo-margi- 
nata; anfr. 4 planiuscuii, ultimus obluso angulatus; columella 
obliqua, margine granulosa; apertura dilatata, lunaris; perist. 
685- H. intorta Sowerby. 
686. H. Valcncicnncsii Eydous, 
687. H. filaris Valcncicnncs. 
