156 
HYDROCENA §. 1. 
Hydrocena Bridgesi Pfr. in Proc. Zool. Soc. 1854. p. 305. n. 4. 
— — H. et A. Adams Gen. rec. Moll. II. p. 299. 
Habitat in Valdivia; sub lapidibus in locis humidis legit Th. 
Bridges. 
3. IS. cornea Pfr. 
T. subperforata, ovato-conica , solidula, laevigata, nitida, 
fulvo-cornea; spira conica, apice acuta; sutura impressa, sub- 
margin at a ; anfr. convexiusculi, ultimus spira paulo bre- 
vior , peripheria obsoletissime angulatus , juxta perforationem 
punctiformem vel clausam subcompressus ; apertura obliqua, 
angulato-ovalis , basi subeffusa ; perist. subsimplex, margine 
dextro recto, columellari calloso, subappresso. — Long. 10, 
diam. 5 mill. Ap. 4V 2 mill, longa, 3 lata. (Coll. Nr. 332.) 
Hydrocena cornea Pfr. in Proc. Zool. Soc. 1854. p. 306. n. 7. 
— — H. et A. Adams Gen. rec. Moll. II. p. 299. 
Habitat Borneo et ,.Bashee Island 4 * (Sir E. Belcher). 
4. M. vulgiina Pfr. 
T. perforata , globoso-conica , solida, laevigata, rubella ; 
spira conica, acutiuscula ; anfr. 5 modice convexi , ultimus 
spiram aequans, rotundatus ; apertura parum obliqua, angulato- 
ovalis; perist. subcontinuum , adnatum , margine dextro sub- 
infiexo, columellari calloso. — Operc. tenue, castaneum, pauci- 
spirum. — Long. 8 , diam. 6 mill. Ap. 5 mill, longa , 4 4 / 3 
lata. (Mus. Cuming.) 
Hydrocena vulpina Pfr. in Proc. Zool. Soc. 1857. p. 112. 
Habitat „Fox Islands. 44 
5. If. brevicula Pfr. 
T. subimperforata , globoso-conica, solidula, sublaevigata, 
corneo-fulva ; spira convexo-conoidea, acutiuscula; sutura sulco 
profundo marginata ; anfr. sub-6, superi plani, plerumque erosi, 
penultimus convexus, ultimus spira longior, inflatus; apertura 
subverticalis, angulato-semiovalis ; perist. rectum, margine co- 
lumellari calloso , appresso. — Long. diam. mill. 
Ap. 5 mill, longa, 2 2 / 3 lata. (Mus. Cuming.) 
Hydrocena brevicula Pfr. in Proc. Zool. Soc. 1854. p. 306. n. 10. 
— — H. et A. Adams Gen. rec. Moll. II. p. 299. 
Habitat Singapore, 
