HYDROCENA §. 1—3. 173 



circularis ; perist. simplex, rectum, ad anfr. contiguum brevis- 

 sime interruptum, margine sinistro vix reflexiusculo. — Long. 2, 

 diam, 1 mill. (Coll. Nr. 516.) 



Hydrocenct Purchasi Pfr. in Proc Zool. Soc. 1861. p. 150. 



Habitat „Bay of Islands" Novae Seelandiae (Purchas, 

 Hochstetter). 



14. Miliuni Bcns. \ (Inilia. Conf. genus GenrifiSa.) Pneum. 11. p. 1.58. ]049. 



§. 2. 



\:->. exserta Pfr. (Shanghai.) - - - l.^iS. lo.^io, 



16. H. ? TAhiteuisis Pease. -f- lo.^ii. 



T. imperforata, pyramidalis, vitrea, rubenti-cornea, longi- 

 tudinaliter costata : costis irregularibus (ultra 20), prominenti- 

 bus, interstitiis concavis , longitudinaliter minutissime striatis; 

 anfr. 6 rotundati, sutura profunda separati; apertura angulato- 

 ovalis ; hibrum album, continuum , anfractui contiguo non vel 

 breviter adnatum. — Long. 7, hitit. S'/^ mill. (P.) 

 Cyclosloma tuhilcnsis Pease in Proc Zool. Soc. 1861. p. 243. 

 Habitat Pluaheine. 

 b s. Num revera huc pertinens ? 



17. obtusa Pfr. (Habitat?) Pneum. II. p. 1.59. 1052. 



18. oblonga Pfr. iColl. 517. — Ins. Marquesas.) - - - 159. 1053. 



19. iiyramis Pfr. (Singapore.) - - - 160. 1054. 



20. Cattaroensis Pfr. Coll. 518. — Dahnatia.) . - - - 160. 1055. 



21. miuutissima Sow. (Coli 519. — Ins. Pitcairn.) - - - 160. 1056. 



22. exigua Jacq. f (^"s. Mangareva.) - - - 161. 1057. 



§. 3. 



23. SI. ? Ilrnta Moreli*t 1055 



T. subperforata , ovato-conica, solida, spiraliter conferte 

 sti*iata, epidermlde saturate vioLaceo-fusca induta ; spira conica, 

 apice erosa ; anfr. distincti 3— 4, ukimus spiram superans, infra 

 suturam impressus et Hris nonnullis foitioribus notatus, basi 

 subangustatus; apertura subverticalis, semiovalis; perist. simplex, 

 margine dextro recto, columellari subdilatato, appresso. — 



