IIELIX §.53. 263 



nigrum, subincrassatum , parum expansum. — R. a, = 4 : 7. — 

 Diam. maj. 37, min. 30, alt. 21 mill. (Mus. Cuming.) 

 Helix filari& Val. Mus. Paris. (tesle Cum.) 



— — P[r. in Proc. Zool. Soc. 1845. p. 38. 



/?. Minor, apice nigricante, sutura rufa: diam. maj. 33 , min. 27, alt. 



19 mill. (Mus. Cuming.) 

 Habitat in insula Marinduque Philippinarum (Cuming). 



Ob s. 1 . Intermedia inter H. Valenciennesii et virginem , a priore spira ele- 

 vala et anfractu uitimo obtuse angulato, basi non inflato, ab ailera spira majore, 

 columella magis obliqua et perist. incrassalo , nigro diversa. 



Obs. 2. H. conformis Fer. ex icone speciebus praecedentibus affinis vide- 

 tur, tamen ex descriptione alio loco inserenda. (Conf. Nr. 777.) 



688. H. Sirena Bech. , _ 



T. imperforata, globoso-depressa, diaphana J Vpirafiter minu- 

 lissime et confertissime striata, pallide viridis aut straminea, 

 fasciis rufis et saturate viridibus ornata; spira parum elevata; su- 

 tura levis; anfr. 4 convexiusculi, ultimus ad peripheriam interdum 

 subangulatus , albido-cingulatus, antice subito deflexus; 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. 

 ISy^, alt. ISy^ mill. (CoU. Nr. 410.) 

 Helix Sirena Beck in sched. Cuming. 



— — Pfr. Symb. II. p. 39. 



— — Chemn. ed. II. Helix N. 309. t. 53. f. 14 — 17. 



/i. Major, subcarinata, subtus unicolor, perist. albo : diam. maj. 26, 



min. 20^2, alt. 14^2 mill. (Spec.) 

 Helix Sirena Phil. Icon. I. 4. p. 78. Helix t. 4. f. 6. 

 y. Unicolor straminea, fascia pallidiore supra carinam obtusam: dimens. 



sicut var. /3. (Spec.) 

 Habitat in insula Panay Philippinarum (Cuming.) 



Obs. Huic similes sunt varietates nonnuUae ecarinalae H. Htigeli Pfr. 



(Conf. Nr. 785.) 



* * 



689. H. Petitiana Orbigny. f 



T. imperforata, subdep^essa, ovata, crassa, exilissime trans- 

 versaliter et longitudinaliter striata; spira brevis, obtusissima; 

 anfr. 4; apertura lata; labrum margine incrassatum, reflexum; 

 columella complanata. — Diam. 67, alt. 27 mill. (0.) — Diam. 

 maj. 67, min. 48, alt. 31 mill. (ex ic.) 



Helix Petitiana Orb. moll. cub. I. p. 144. t. 9. f. 1—3. 

 Hahitat in insula Cuba: Jagua. 



Obs. «SimilisH. auricomae Fer. , metguitudine et peristomale reflexo di- 

 slinauenda.» 



