CHONDROPOMxV.— Plate IX. 



oblong- conical, dull _yellowisb, siibhyaliiie, sparsely 

 banded with brown behind the aperture, whorls 

 slopingly convex, spirally elevately striated, aperture 

 ovately-circidar, lip very broadly concavely frilled. 



Cyclostoma Gruueri, Pfeitfer, Zeitschr. fiir Malac. 184fi, 

 p. 47. 

 Cistula Gruueri, Gray. 



Hab. Honduras. 



Of a peculiar dull, delicately transparent substance, 

 faintly sculptured. 



Species 69. (Mus. Cuming.) 



Chondkopoma radiosum. Chond. testa vix mnbilicatd, 

 anguste tiirb'matd, rubello-stramined, palUde fasco in- 

 terrupte lineatd, anfractibus convexis, longitudinaUter 

 dense crispato-siriatis ; aperturd parvd, labro late 

 coHcavo-Jimbriato, fimbria pUcatd, fusco-radiatd. 



The kayed Chondropoma. Shell scarcely umbilicated, 

 naiTowly turbinated, reddish straw coloui-, faintly in- 

 terruptedly lineated with brown, whorls convex, lon- 

 gitudinally densely crisply striated ; apertiu'e small, 

 lip broadly concavely frilled, friU puckered, rayed 

 with brown. 



Cyclostoma radiosa, Morelet, Test. Noviss. p. 22. 

 Cistula radiosa, Pfeiffer. 



Hub. Guatemala. 



Exquisitely sculptured longitudinally, and beautifully 

 rayed with brown behind the aperture. 



Species 70. (Mus. Cuming.) 



Chondropoma rostkatum. Chond. testa mnbilicatd, 

 siibanyuste turbinatd, albidd, subhyalind, fiasco lomji- 

 tudinaliter alternatim midald et punctatd, avfiractlbus 



convexis, creberrime longitudinaUter fiuniculatis, in 

 suturas denticulatis ; aperturd ovato-circulari, labro 

 caUoso-fimbriato. 



The beaked Chondroposia. Shell umbilicated, rather 

 narrowly turbinated, whitish, subhyaline, alternately 

 longitudinally waved and dotted with brown, whorls 

 convex, very closely longitudinally corded, denticu- 

 lated in the sutures, aperture ovately circular, lip 

 callously frilled. 



Cyclostoma rostratum, Pfeiffer, Pro. Zool. Soc. 1853, p. 66. 

 Cistula rostrata, Pfeiifer. 



Hab. ? 



Neatly painted throughout with curiously regidar waved 

 lines and distant dots, ranging alternately. 



Species 71. (Mus. Cuming.) 



Chondropoma bilabiatum. Chond. testa timbilicatd, 

 ovato-turriid, livido-cinered, anfiractibus convexis, lineis 

 spiralibus lameUisque scabrosis longitudinulibns decus- 

 satis ; aperturd pyriformi-ovatd, obliqud, labro sub- 

 fimbriato. 



The two-lipped Chondropoma. Shell umbilicated, 

 ovately tm-reted, livid ash-coloiir, whorls convex, 

 decussated with spu'al lines and longitudinal sca- 

 brous lamellse, aperture pyriformly ovate, oblique, lip 

 slightly fimbriated. 



Cyclostoma bilabiatum,, D'Orbigny, MoU. Cub. p. 258. pi. 

 22. f. 3 to 5. 



Cyclostoma D'Orbignianum, Petit. 

 Cyclostoma salebrosum, Morelet. 

 Choanopoma bilabiatum. Gray. 

 Ctenopoma bilabiatum, Pfeifl'er. 



Hab. Cuba. 



Chiefly distinguished by its close-set longitudinal sca- 

 brous lamellie. 



