HELIX §. 13. 1i. 27 



170. H. plagioptycha Shuttleworth. 



T, minuta, perforata, conoideo-globosa vel turbinata, la- 

 mellis tenuissimis strias incrementi diagonaliter decussantibus 

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

 apice obtusa; anfr. 4 convexissimi, sensim accrescentes, ulli- 

 mus subinflatus; sutura profunda; aperlwra depresso-subrotun- 

 data; perist. simplex, acutum, marginibus .pauUulum conniven- 

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

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



Helix plagioptijcha Shuitl. Dlagn. n. Moll. Nr. 6. p. 1!29. 



— — (Patula) Pfr. Vers. p. 125. 



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

 Ilabitat rara in insulis Portorico et Vieque (Blauner). 



Obs. «//. tenuicosla Sh. ct forsan //. Orcula Bens. affinis.» 



§. 14. 



171. ovwmVal. (Coll. 77. — fiu. 1. 1. f. 1. 4. — H.meri- 

 dionalis Wood , Otaheilana Fer. — Nanina ovum 

 Gray Cat. Pulm. p. 104. — Rhyssofa P[r. Vers. 

 p. 121. — Nanina Otaheitana [Rhyssota] Ad. Gen. 

 p. 223.) Mon. III. p. G9. 



172. H. Rhea Pfr. 



T. subobtecte perforata , subturbinato-depressa , solida, 

 striata, sulcis obliquis, irregularibus profunde cicatrosa, epi- 

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

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

 culatara perturgidi , uUimus obsolete angulatus , periplieria 

 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 miU. (CoII. Nr. 78.) 

 Ilelix ovum y Pfr. Mon. Hel. I. p. 67. 



— — var. Beeve Couch. 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 IIo in insula Panay (II.* Cuming). 



Obs. Differt ab //. ovo sculptura multo rudiore, anfractibus magis 

 humerosis, margino supero peristomatis minus rotundalo. 



173. H. tabida Pfr. 



T. anguslissime umbilicata, lurbinata, solidula, conferte 

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

 convexo-conica . acutiuscula ; anfr. 8 lentissime accrescentes. 



