IIELIX §. 13. 14. 27 



170. H. plagioptycha Shuttlcworth. 



T. niinula, perforata, conoideo-globosa vel lurbinata, la- 

 mellis lenuissimis strias incrementi diagonaliter decussanlibus 

 oblique costulata, cornea, sericina , subpellucida; spira elevata, 

 apico obtusa; anfr. 4 convexissimi, sensim accrescentes, ulti- 

 mus subinflatus; sutura profunda; aperlura depresso-subrotun- 

 data; perist. simplex, acutum, marginibus paullulum conniveu- 

 tibus, columcllari expanso, ad umbilicum reflexiusculo. — Diam. 

 maj. 3, min. 2V2, alt. 2 mill. (Cofl. Nr. 76.) 



Helix plagioptycha SJmttl. Diagn. n. Moll. Nr. 6. p. 129. 



— — (Patula) Pfr. Vers. p. 125. 



— plaguptycha Reeve Conch. ic. n. 1262. t. 182. 

 Habitat rara in insulis Portorico et Vieque (Blauner). 



Obs. uH. temiicosta Sh. ct forscin //. Orcula Bens. affinis» 



§. 14. 



171. ovumVal. (Coll. 77. — /?(;. 1. 1 . f. 1 . 4. — H.meri- 



dionalis Wood, Otaheitana Fer. — Nanina ovum 

 Gray Cat. Pulm. p. 104. — Rhyssola Pfr. Vers. 

 p. 121. — Nanina Otaheilana [Rliyssota] Ad. Gan. 

 p. 223.) Mon. III. p. 60. 



172. H. Rhea Pfr. 



T. subobtecte perforata , subturbinato-depressa , solida, 

 striata, sulcis obliquis, irregularibus profunde cicatrosa, epi- 

 dermide glutinosa, fulva, castanco-strigata obducta; spira bre- 

 vis, conoidea, obtusa; anfr. 5 convexi, infra suturam canali- 

 culatam perturgidi , ultimus obsolete angulatus , peripheria 

 albido-fasciatus, basi leviter undulato-striatus, subcompressus; 

 apertura perobliqua, truncato-ovalis, intus albida, nitida; perist. 

 simplex, obtusum, margine dextro subinflexo. — Diam. maj. 69, 

 min. 56, alt. 37 mill. (CoII. Nr. 78.) 

 Helix ovion •y Pfr. Mon. Hel. I. p. G7. 



— — vai'. Reeve Conch. ic. t. 1. f. 2. 



— Rhea Pfr. in Proc. Zool. Soc. 1855. p. 111. 

 Nanina Rhea (Rhyssota) Pfr. Vers. p. 121. 



Habitat Dingle provinciae IIo llo in insula Panay (II. Cuming). 



Obs. Differt ab H. ovo sculplura multo rudiore, anfractibus magis 

 humerosis, margine supero peristomatis minus rotundato. 



173. H. tabida Pfr. 



T. augustissime umbilicata, turbinata, solidula, conferte 

 rugoso-striata, sub epidermide decidua, fuscula alba; spira 

 convexo-conica , acutiuscula; anfr. 8 lentissime accrcscentcs, 



