REALIA 8.3. & 215 
conico-pyramidata, acutiuscula; anfractus 6 convexi, subsca- 
lares, ultimus ventrosus, basi cirea perforationem profundam, 
obtuse carinatus; sutura vix profunda; apertura rotunda; pe- 
ristoma simplex, continuum, intus vix callosum, rectum, mar- 
ginibus callo tenui junctis, columellari incrassato, ACA. 
reflexo. — Operculum corneum, tenue, nitidum. — Long. 1, 
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 77. Crosseanae, sed major, colore interno, 
peristomate continuo, subanguloso et basi latiore discrepans.* 
3s. R. brevissima (Hydrocena) Mousson. 7 
».l. minuta, semiperforata, late conico-ovata, tenuis, pel- 
lucida, nitida, pallide rufo-cornea. Spira late conica; summo 
parvo; sutura simplice, profunda. Anfr. 3!/,, celeriter accres- 
centes, convexi; ultimus non ascendens, subinflatus, subtus 
bene rotundatus, ad regionem umbilicarem impressus. Aper- 
tura parvula, subverticalis, late semiovals.  Perist. rectum, 
obtusulum; marginibus lamina tenuissima, adnata junctis; dex- 
tro et basal cireulariter 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 
(Gràáffe). 
* * 
* 
Obs.  Excludatur ex hac sectione (praeter Cyclostoma | minutissimum 
Sow.) et imo e Cyclostomaceorum (terrestrium) familia: Cyclostoma | Catta- 
roense Pfr. (— Paludina Sirki Parr. olim.; Hydrocena  Sirkü Parr., Catta- 
rodensis Pfr. Pneum. Il. 160. IIL. 173, cattaroensis et Sirki Pütel Cat. p. 
124; ARealia cattaroensis Gray;  Hydrocaena | Cattaroénsis  Küst.;  Hydrocena 
Syrkii Walderd. Syst. Verz. Catt. p. 9) e Dalmatia. 
ge 
39. ?lirata (Hydrocena) Morelet. IIL 173. —  Assimiea lirata 
Mart. 1866. p. 205; Pease 1869. p. 163. — Cochinchina. 
40. R. Raiateensis (Hydrocena) Mousson. 1 
A perforata, convexe conico-turrita, transverse obsole- 
üssime spiraliter striatula, pallide cornea. Spira regularis, 
supra conica; summo obtusulo; sutura lineari, incisa.  Anfr. 
