HYDROCENA §.1. J57 



6. H. albescens Pfr. 



T. subperforata, ovato-conica, solidula, sublaevigata, albida 

 vel pallide lutescens ; spira convexo-conica, apice acuta ; anfr. 6 

 convexiusculi , ultimus spira paulo brevior, infra medium ob- 

 solete subangulatus , basi rotundatus ; apertura subverticalis, 

 angulato-ovalis; perist. simplex, rectum , margine columellari 

 calloso, subappresso. — Long. 7, diam. 4 mill. Ap. 3 mill. 

 longa, 2 lata. (Coll. Nr. 333.) 



Hydrocena albescens Pfr. in Proc. Zool. Soc. 18.54. p. 306. n. 8. 



— — ^. et A. Adams Gen. lec. Moll. II. p. 299. 

 Habitat in insula Opara. 



7. H. solidula Pfr. 



T. subperforata, ovato-conica, solidula, sublaevigata, irre- 

 gulariter erosa, haud nitens, cerea ; spira convexo-conica, apice 

 acuta; anfr. 6 subplani, ultimus spira paulo brevior, obsolete 

 angulatus, basi convexiusculus; apertura verticalis, angulato- 

 ovalis; perist. simplex, rectum, margine columellari subincras- 

 sato. — Long, 6, diam. 4 mill. Ap. 2-/3 mill. longa, 2 lata. 

 (Coll. Nr. 334.) 



Hydrocena solidula Pfr. in Proc. Zool. Soc. 1854. p. 305. n. 5. 



— — H. et A. Adams Gen. rec. Moll. II. p. 299. 

 /9. Minor, rubella, angulo peripherico distinctiore. 



Habitat „Lord Hood's Island." 



S. H. oceanlca Jacqiiinot. *{* 



T. subperforata, oblongo-conica, laevigata, pallide lutes- 

 cens; spira convexiusculo-conica , acuta; anfr. b^j^ convexi, 

 ultimus spira brevior, supra medium obsolete angulatus; aper- 

 tura ovalis ; perist. subcontinuum, rectum, margine columellari 

 dilatato. — Long. 5, diam. 2 mill. (Ex icone.) 



Cyclostoma oceanica Hombr. et Jacq. Voy. Pol Sud. Zool. V. p. 48. 

 t. 12. {. 4 — 6. 



Habitat in insula Vavao. 



9. H. sutta IShuttlewortli. 



T. subimperforata, globoso-ovata , solidula, laevis, niti- 

 diuscula, pellucida, flavo-rufescens ; spira elata, obtusula; anfr. 

 3'/2 — 4 convexi, ultimus spiram subaequans, rotundatus; aper- 

 tura obliqua, semicirculai'is ; perist. simplex, rectum, margine 

 columellari callo nitidissirao diffuso ornato. — Operc. conco- 



