HYDROCENA §. 1. 2. 159 



Cyclostoma Milhtm Bc7is. in Ann and Mag. 2d. ser. XI. p. 285. 

 Cyclophorus? Milium Pfr. in Malak. Bl. 1854. p. 84. 



— — //. et ^. Adams Gen. rec. Moll. II. p. 280. 

 Ifydrocena MiUum Bens. in Ann. and Mag. N. H. 2d. ser. XVII. p. 232. 



Habitat cum priore. 



%. 2. 

 13. H. exserta Pfr. 



T. subperforata , ovato-turrita, solida, confertim striata, 

 fusculo-cornea ; spira elongato-conica, apice acuta; anfr. G 

 convexiusculi, subcarinati (carina ad suturam subexserta) , ul- 

 timus 2,5 longitudinis formans, peripheria angulatus, basi com- 

 pressiusculus; apertura vix obliqua, acurainato-rotundata; pe- 

 rist. subsimplex, marginc dextro expansiusculo, superne leviter 

 repando, columellari calloso, subreflexo. — Long. 7, diam. 

 4 raill. Ap. 3 mill. longa, 2^/3 lata. (Mus Cuming.) 



Hydrocena exserta Pfr. in Proc. Zool. Soc. 1854. p. 306. n. 12. 



— — H. et A. Adams Gen. rec. Moll. II. p. 299. 



Habitat in insula Shanghai. 



14. H. obtusa Pfr. 



T. imperforata, conico-ovata, tenuiuscula, striatula, nitida, 

 fulvo-cornea ; spira conica, obtusa; sutura marginata; anfr. 5 

 planiusculi, ultimus spira paulo longior, ventrosus; apertura 

 subverticalis, angulato-semiovalis; perist. simplex, rectum, 

 margine columellari calloso, reflexo, appresso. — Long. 6 1/2» 

 diam. 4 mill. Ap. 31/0 miH- longa, 2V3 lata. (Mus. Cuming.) 



Hydrocena obtusa Pfr. in Proc. Zool. Soc. 1854. p. 30G. n. 9. 



— — //. et A. Adams Gen. rec. Moll. H. p. 299. 



Habitat . . . ? 



15. H. oblonga Pfr* 



T. subperforata, oblongo-conica , soUda, striatula, opaca, 

 fulvo-albida ; spira ovato-conica, apice acuta; sutura marginata; 

 anfr. 6 convexiusculi, ultimus 1/3 longitudinis paulo superans, 

 convexior, peripheria filocarinatus, juxta perforationem puncti- 

 forraem subcompressus ; apertura verticalis, angulato-rotundata, 

 intus aurantiaca; perist. simplex, rectum, raargine columellari 

 calloso, subpatente. — Long. 6^/2 > diam. 3 mill. Ap. 2^2 

 mill. longa. (Coll. Nr. 336.) 



