L dEUr 
113. Helix decipiens Sow. Proc. zool. soc. 1840. p. 96. 
— T. imperforata, globosa, tenui, levi, non nmitente, pellucida, 
fulva sel sulphurea, epidermide hydrophana alba strigata vel fas- 
ciata, zonis nonnullis purpurco-nigricantibus interdum circemdata ; 
spira subelata; anfr. 4 rotundatis; columella alba, subarcuata ; 
apertura lunato-suborbiculari, intus lactea; perist. expanso. 
Diam, 40, altit. 29 mill. — Rat. anfr. — 1: 2. — Insul. Ca- 
pul ct Luzon. (Cum.) 
Ex speciminibus 9 a Cumingio missis duo tantum (var. ex 
ins. Capul: fulva, nigrotrifasciata, et ex ins. Luzon: sulphurea, 
albo-strigata) descriptioni Sowerbyans conveniunt, reliqua ad H. 
mirabilem Fér, referenda sunt, Quare observatio Cl. Valencien- 
nesii (in Sow, 1841. p. 3. laudata), ambas species csse identicas, 
ad specimina hoc nomine distributa, neque ad species ipsas est 
referenda. 
. H. decipiens magis affinis est H. pulcherrimze, quam mirabili. 
Differt ab illa precipue apertura minus transversa, subelongata, 
columella non excavata, peristomate expanso, nec reflexo. 
114. Helix detecta Fér. Mus. Par. — Caroc. detecta Beck 
p. 32? — T. imperforata, lenticulari, carinata, fusca, costulato- 
striata; anfr. 5!/, convexis; carina late prominente, in anfractibus 
superis suture adpressa; basi convexa; apertura securiformi 
perist. simplice, vix incrassato., 
Diam. 14. alti. 6 mill, — Rat. anfr. 3 : 4, — Ins. Bourbon. 
115. Helix diluta Pfr, — T. umbilicata, depressa, orbi- 
culari, tenui, pellucida, flavo-cornea, fasciis 3 ornata: media sa- 
turate rufa, supera et infera latiore dilutis; anfr. 4 planiusculis; 
umbilico angusto, pervio; apertura perobliqua, lunari: perist, sim- 
plice, margine columellari expanso, carneo, 
Diam. 22, altit. 11 millim, — Rat, anfr. — 4; 7. — Cusco. 
Similis H. feetenti Stud., umbilico angusto ct anfractu ultimo 
non deflexo satis distincta. 
116. Helix elevata Say Journ, acad. nat. sc. Phil. Hl. p. 
154. — Amer, conch. t. 37. f. 2. — Tridopsis elevata Beck p. 22. 
licinum Raf, — Helicodonta Knoxvillina Fér, pr. 94. 
t. 49. f. 5. 6. — T. obtecte perforata, subglobosa, oblique striata, stra- 
minea: spira elevata: anfr. 7 convexiusculis, uitimo inflato; aper- 
tura subtriangulari; perist. subreflexo, intus albo, margine  colu- 
mellari dilatato; calloso: dente unico linguaeformi inter margines 
aperturae, 
Diam. 25, altit, 17!/, mill. — Rat, anfr. — 3: 4. — hknox- 
ville (Tennessee) Fér. Prope Cincinnati (Ohio) freq. Say. 
117. Helix fallaciosa (Helicella) Fér. pr. 179. t. 71. f. 1. 
