177 



spim turrlta, late truncata; sutura minutc clenticulata; anfr. 

 superst. 4, ultimus antice vix solutus; apertura verticalis, 

 ovalis; perlst, duplex: interniim breve, adnatum, externum 

 aequaliter dilatatum, patens, superne nodulum reflexum, 

 anfractum contiguum tangentem emittens. — Operc. prae- 

 cedentls. — Long. D'/a? diam. 4 mill. Ap, 2^i\ mill. longa, 

 2 lata. — ■ Var, min. anfr. 4: long. 7^2» diam. S^/o mill. 



Habitat Cabo de Cruz. 



11. Cyclostoma Arangianum Gundl. 



T. perforata, ovato-turrita, truncata, tenuis, liris sub- 

 remotis et costulis confertis illas acute transgredientibus 

 sculpta, haud nitens, fulvida, fusco varicgata et seriatim 

 maculata; spira regularltcr attenuata, sublate truncata; su- 

 tura irregulariter et subremote crenata ; anfr. superst. 4 

 convexi, ultimus latior, antice non solutus, basi distinctius 

 liratus ; apertura verticalis, fere circularis, superne obsolete 

 angulata; perist. duplex: internum vix prominulum, exter- 

 num subaequaliter patens, concentrice striatum, fusco-radia- 

 tum, latere sinistro undulatum, superne in auriculam medi- 

 ocrem productum. — Operc. paucispirum, nucleo fere cen- 

 trali, anfractibus lamina elevata munitis. — Long. 12, diam. 

 öVo niill. Ap. 4 mill. longa. 



Habitat Jucaro prope Cabo de Cruz. 



Diese Art gehört ihrem Deckel nach zu Choanopoma 

 §. 1 Pfr, Mon. Pneum. 



12. Cyclostoma perplicatum Gundl. 



T. vix subperforata, ovato-turrita, truncata, solida, liris 

 fortibus circumdata et striis confertis filifbrmibus, illas trans- 

 gredientibus sculpta, opaca, unicolor isabellina; spira sub- 

 regulariter attenuata, late truncata; sutura profunda, fasci- 

 culato-crenata; anfr. superst. 4 — 4^/2 convexi, ultimus an- 

 tice vix solutus; apertura verticalis, ovalis; perist. sub- 

 duplex : internum continuum , adnatum , externum breviter 

 expansum, superne angulatim productum, ad anfr. conti- 



Malak. Bl. XXII. Sept. 57. 12 



