HELIX §. 53. 
263 
suLincrassatuiii , parum expansum. — R. a. = 4 : 7. — 
Diam. maj. 37, miii. 30, ait. 21 mill. (Mus. Guming.) 
Helix filaris Val. Mus. Paris, (teste Guui.) 
— — Pft\ in Proc. Zool. Soc. 1845. p. 38. 
Minor, apice nigricante, sutura rufa; diam. maj. 33, min. 27, ait 
19 mill. (Mus. Guming.) 
Habitat in insula Marinduque Philippiuarum (Guming). 
Obs. 1. Intermedia interii. Valenclennesii et virginem, a priore spira ele- 
vata cl anfractu ultimo obtuse angulato, basi non inflato, ab altera spira majore, 
columella magis oblitiua et perist. incrassato, nigro diversa. 
Obs. 2. H. conformis Fer. ex icone speciebus praecedentibus affinis vide- 
tur, tamen ex descriptione alio loco inserenda. (Conf. Nr. 777.) 
GS8. H. Sirena Beck. 
T. imperforata, globoso-depressa, diaphana, spiralitcr minu- 
tissime et confertissime striata, pallide viridis aut straminea, 
fasciis rufis et saturate viridibus ornata; spira parum elevata; su- 
tura levis; aufr. 4 convexiusculi, ulliimis ad peripheriam interdum 
subangulatus, albido-cingulatus, antice subito defiexus; columella 
brevis, arcuata, macula fusca circumdata; apertura lunato-elliptica, 
intus fasciata ; perist. simplex, late expansum , nigricans, mar- 
ginibus conniventibus. — R. a. = 8 : 15. — Diam. maj. 24, min. 
IS^/a, ait. 15/2 mill. (Goll. Nr. 410.) 
Helix Sirena Btck in sclicd. Guming. 
— — Pfr. Symb. II. p. 39. 
„ _ Chemn, ed. 11. Helix N. 309. t. 53. f. 14 — 17. 
ff. Major, subcarinata, subtus unicolor, perist. albo: diam. maj. 26, 
min. 20'/2, ait. mill. (Spec.) 
Helix Sirena Phil. Icon. I. 4. p. 78. Hcllx t. 4. f. 6. 
y. Unicolor straminea, fascia pallidiore supra carinam obtusam: dimens. 
sicut var. fl. (Spec.) 
Habitat in insula Panay Philippinarum (Guming.) 
Obs. Huic similes sunt varielales nonnullae ccarina*lac II. Iltigeli Pfr. 
(Conf. Nr. 785.) 
* 
689. H. Petitiana Orbig^ny. 
T. imperforata, subdepressa, ovata, crassa, exilissime trans- 
vcrsaliler et lougiludinaliter striata; spira brevis, obtusissima; 
anfr. 4; apertura lata; labrum margino incrassatum, reflexum; 
columella complanata. — Diam. G7, all. 27 mill. (0.) — Diam, 
maj. G7, min. 48, ait. 31 mill. (ex ic.) 
Helix Petiliana Orb, moli. cub. I. p. 144. l. 9. f. 1 —3. j 
Habitat in insula Guba: Jagua. 
Obs. «Similis IL imricomac Fer. , magnitudine cl pcrislomalc reflexo di- 
slinguciula.w 
