216 REALIA $. 4—6. 
11[,, primi magis, sequentes minus convexi, ultimus planulatus, 
infra distüncte angulatus, ad basin convexiusculus, ad per- 
forationem apertam arcte rotundatus. Apertura verticalis, ?/; 
altitudinis aequans, pene circularis. Perist. supra minus, deinde 
magis expansum, ad basin arcuatim paulo productum; margi- 
nibus convergentibus, callo nitido junctis; dextro et basal 
regulariter curvatis; columellari crassiusculo, versus perfora- 
tionem breviter reflexo. —  Altit. 8, diam. 3,1 mill. — Rat. 
anfr. 3:1. — Rat. apert. 1:1.* (M.) 
Hydrocena. Raiateensis Mouss. in Journ. Conch. XVII. 1869. p. 67. t. 5. f. 5. 
Habitat Raiatea insularum Societatis (Garrett). 
Obs. JPease (Proc. Zool. Soc. 1871. p. 476) speciem. ad At/ropidem 
productam Ps. refert. Conf. KR. elongata Pease. 
San. 
41. barbata (Cyclostoma) Gould. III. 174 (Hydrocena). — Japonia 
barbata Gould, Pease 1869. p. 159. — Conf. Martens Ostas. Zool. 
II. p. 12. — Ousima Japoniae. 
49. citharella (Cyclostoma) Gould. f III. 174 (Hydrocena) — 
Japonia citharella Gould, Pease 1869. p. 159. — Ousima Japoniae. 
43. musiva (Cyclostoma) Gould. f III. 174 (Hydrocena). — Japonia 
musiva Gould, Pease 1869. p. 159. — Conf. Cyclophorus halophilus 
-Bens. (p. 112.) — Japonia? 
8m. 
44. R. costata Pease. 1 
.T. ovato-turrita, umbilieata, longitudinaliter costata, co- 
stis ad anfr. ultimum obsoletis; anfr. 6, rotundatis, suturis 
profundis; perist. continuo, vix everso, anfr. penultimo dis- 
juncto; apertura rotundato-ovata, intus aurantia; albida vel 
dilute cornea. — Long. 6, diam. 3!/ mill.* (P.) 
KRealia costata. (Scalinella) Harper Pease in Amer. journ. conch. III. 
1867. p. 225. 
SScalinella costata Pease Journ. Conch. XVII. 1869. p. 158. t. 7. f. 9. 
— — . Schmeltz in Mus. Godeffr. cat. V. p. 102. 
Habitat in insula Tahaa Polynesiae. 
* 
45. Tahitensis (Cyclostoma) Pease. t III. 173 (Hydrocena?) — 
Scalinella. T'ahitensis Pease in Journ. Conch. 1869. p. 58. t. 7. f. 
l. — Mart. $ Langk. Don. Bism. p. 59. t. 4. f. 3. — Schmeltz 
in Mus. Godeffr. cat. V. p. 102. — Huaheine. 
