— 151 — 



Obs. Priori sine dubio affine, sed faclllime dis(ing,'uendum, prae- 

 sertim increraenti ratione et sculplura cxiniie aspcrata. 



62. Cyclostonia (Cistula) Riisei Pf. 



Syn. Cisiula Biisei Pf. Mon. Pneum. p. 418, N0 6a in add. 

 Var. ß. nodulosa ; costis subflexuosis, remote et leviler Pus- 

 tulosis Q)ustulis lineas spirales mcnticnlibus) ; lineis ru- 

 fis iiiterruptis , sub forma fasciaium transversaruin sa;- 

 pius occurrcnlibus, interduni conflucntibus notata. 

 Hab, Formam typicam e Portorico ab am. Bland et Albers ac- 

 cepi 5 varietatem ad rupes sub foliis delapsis prope San Juan, 

 legit. b. Blauncr, sed parce. 

 Obs. Aiffractus ultimus stepissime breviter solutus est 5 perist. 

 duplex, internum vix porrectum, cxtcrnum breviter expansuni, 

 interdum rubro-punctatum , et ad marginem internum (colu- 

 mellarem) sa?pius inconspicue fimbriato-dentatum. 



Annon huc referendum Cydosloma lineolaium Lam ? 

 (cf. Delessert Rec. t. 2i>, f. 8). ~ Cülula ? Hneolala Pf. 

 Mon. Pneum. p. 270, NO 18. (Cliemn. ed. 3, t. 6 , f. ST- 

 BS), neque cum diagnosi Lamarckiana, neque cum icone 

 Delessertiana supra laudata ne minima quidem ex parte con- 

 gruit. 



63. Cyclostonia (Chondropoma) Blaiiiieri Shuitl. n. sp. 



Testa subperforata, ovato-coniea, truncalula, confertissime 

 costulato-striata , lineisque spiralibus obtiisis inconspicue sub- 

 decussata et nodulosa, violaceo-fusca, lineis fiexuosls, vel macu- 

 lis curvalis, scriatis, saturatioribus pUirizonata, non nitens; spira 

 regulariicr attenuataj sutui-a confcitim papilioso-crenulata; anfr. 

 supcrst. 5V2 ) convcxiusculi, ultimus anlice vix breviter solutus; 

 apcrtura parum obliqua, subovalis; perist. subduplex, pallidum, 

 obscure fusco-punctatum , internum vix levitfr porrectum, exter- 

 num anguste patcns , supernc brcvissimc angulalo - productum. 

 Opcrculum cardlagineum , pauce spiraJum , anfr. rapide accres- 

 centibus , nucleo valde excentrico. 



Alt. 20; Diam. 8; Apert. 6 mlll. longa. 

 Hab. Sub foliis delapsis prope Humacao, infrcqucns. 

 Obs. Forma, sculptura, et plctura C. dccussafo salis simile, sed 



opei'culo et pcristomate optime distinclum. 



64. Cyclostoma (Chondropoma) Swiftii Shulll. n. sp. 



Testa perforata, ovato-coniea, tiuncatula, obtuse decussala, 

 pallide fusca, interrupte violaöeo-plurizonata, nitida; spira regu- 

 lariter attenuata; sutura minute papilioso-crenulata; anfr. superst. 

 5, convexi, ultimus subinflatus, antice solutus; apertura vix 



