REALIA §. 3. 4. 
215 
conico-pyramidata, acutiuscula; anfractus 6 convexi, subsea- 
lares , ultimus ventrosus, basi circa perforationem profundam, 
obtuse carinatus; sutura vix profunda; apertura rotunda; pe- 
ristoma simplex, continuum, intus vix callosum, rectum, mar- 
ginibus callo tenui junctis, columellari incrassato, brevissime 
reflexo. — Operculum corneum, tenue, nitidum. — Long. 7, 
diam. 5; apert. 3 mill, longa, 3 lata.“ (G.) 
Hydrocena rubra Gass, in Journ. Conch. XXII. 1874. p. 214. 
Habitat „Baie du Sud“ Novae Caledoniae (Lambert). 
Obs. „ Aliquantulum similis H. Crosseanae , sed major, colore interno, 
peristomate continuo, subanguloso et basi latiore discrepans.“ 
38 . R. brevissima (Hydrocena) Mousson. f 
„T. minuta, semiperforata, late conico-ovata, tenuis, pel- 
lucida, nitida, pallide rufo-cornea. Spira late conica; summo 
parvo; sutura simplice, profunda. Anfr. celeriter accres- 
centes, convexi; ultimus non ascendens, subinflatus, subtus 
bene rotundatus, ad regionem umbilicarem impressus. Aper- 
tura parvula, subverticalis , late semiovalis. Perist. rectum, 
obtusulum; marginibus lamina tenuissima, adnata junctis; dex- 
tro et basali circulariter curvatis ; columellari reflexiusculo, 
appresso. — Long. 1,2, diam. 0,9 mill. — Rat. anfr. 5:2. — 
Rat. apert. 4 : 3.“ (M.) 
Hydrocena brevissima Mouss. in Journ. Conch. XVIII. 1870. p. 194. 
Habitat Lomma-Lomma, Vanua-Valabo insularum Feejee 
(Graffe). 
* * 
* 
Obs. Excludatur ex hac sectione (praeter Cyclostoma minutissimum 
Sow.') et imo e Cyclostomaceorum (terrestrium) familia: Cyclostoma Catta- 
roense Pfr. (= Paludina Sirkii Parr. olim. ; Hydrocena Sirkii Parr Catta- 
roeensis Pfr. Pneum. II. 160. III. 173, cattaroensis et Sirkii Patel Cat. p. 
124; Realm cattaroensis Gray , ; Hydrocaena Cattaroensis Kiist.; Hydrocena 
Syrkii Walderd. Syst. Verz. Catt. p. 9) e Dalmatia. 
§• 4. 
39. ? lirata (Hydrocena) Morelet. III. 173. — Assiminea lirata 
Mart. 1866. p. 205; Pease 1869. p. 163. — Cochinchina. 
40 . R. Raiateensis (Hydrocena) Mousson. f 
„T. perforata, convexe conico-turrita, transverse obsole- 
tissime spiraliter striatula , pallide cornea. Spira regularis, 
supra conica; summo obtusulo; sutura linearis, incisa. Anfr. 
