305 
II. Hyprocena. 
Pfr. in Zeitschr. f. Malak. 1847, p. 112. 
Realia, Gray, Cycloph. Brit. Mus. 1850 (part). 
Hydrocena, Shuttl. Diagn. Moll. Nr. 1. p. 11. 
Shell imperforate or umbilicate, globose-turbinate, ovate or tur- 
reted ; aperture ovate or semicircular ; peristome simple, straight or 
expanded, with disjoined margins. 
A. Hyprocena, Parr. 
(Shell imperforate or subperforate; base of the last whorl not 
keeled ; columellar margin rather callous. ) 
1. HyproceNna MINUTISSIMA, Sow.; Pfr. in Z. f. M. 1847, p.Al2. 
Cyclostoma minutissimum, Sow. 
Realia minutissima, Gray. 
Leptopoma? minutissimum, Pfr. Mon. Pneum. p. 118 (Pitcairn 
Islands). 
2. Hyprocena Gutta, Shuttl. Diagn. p. 11. 
Realia? gutta, Pfr. Mon. Pneum. p. 305 (Teneriffe). 
3. Hyprocena caTraroeEnsis, Pfr. in Z. f. M. 1847, p. 112. 
Cyclostoma Cattaroénse, Pfr. in Wiegm. Arch. 1841, i. p. 225. 
Hydrocena Sirkii, Parr. in sched. 
Realia Cattaroénsis, Gray, 1850 (Dalmatia). 
4. Hyprocena Brineest, Pfr. H. testa viv subperforata, ovato- 
conica, solida, levigata, daucino-rubra ; spira conica, apice 
acuta ; sutura lineart ; anfract. 7 planis, ultimo spiram equante, 
basi rotundato ; apertura vix obliqua, acuminato-ovali, basi sub- 
effusa ; perist. simplice, recto, marginibus callo tenuissimo junctis, 
columellari subreflexo. 
Long. 103, diam. 6 mill. 
Hab. under stones in damp places, Valdivia (Bridges). 
5. Hyprocena soxrpuua, Pfr. H. testa subperforata, ovato- 
conica, solidula, sublevigata, irreguluriter erosa, haud nitente, 
cerea ; spira convexo-conica, apice acuta; anfract. 6 subplanis, 
ultimo spira paulo breviore, obsolete angulato, basi convexiusculo ; 
apertura verticali, angulato-ovali; perist. simplice, recto, mar- 
gine eolumellari subincrassato. 
Long. 6, diam. 4 mill. 
Hab. Lord Hood’s Island. 
6. Hyprocena osionea, Pfr. H. testa subperforata, oblongo- 
conica, solida, striatula, opaca, fulvo-albida ; spira ovato-conica, 
apice acuta; suiura marginata ; anfract. 6 convexiusculis, ultimo 
3 longitudinis paulo superante, convexiore, peripheria filocarinato, 
Jucta perforationem punctiformem subcompresso; apertura verti- 
No. CCLXXIX.—Procrepincs oF THE ZOOLOGICAL Society. 
