160 CHOANOPOMA &. 2. 
269 9. €h. Chittyi dams. 
T. umbilieata, globoso-conoidea, vix truncata, tenuis, 
spiraliter confertim et acute costata, limeis longitudinalibus 
confertissimis decussata, scabra, fulvido-albida, interdum lineis 
rufis obsolete cincta; spira convexo-conica; sutura profunda; 
anfr. 4—4'/, perconvexi, ulümus basi remotius liratus; umbi- 
licus mediocris, pervius; apertura verticalis, circularis; perist. 
duplicatum: internum porrectum, externum limbum latissi- 
mum, concentrice imbricato-striatum , undulato-plicatum, rufo- 
radiatum, margine confertim erenulatum, superne angulatim 
productum, ad anfr. penultimum emarginatum formans. — 
Operc. testaceum, nucleo subcentrali, anfr. sub -5, usque ad 
marginem latum, fere verticaliter erectum , superne subre- 
flexum oblique ruditer striatis. — Diam. maj. 17 , min. 12, alt. 
12 mill. Ap. intus 6, cum limbo 11'/, mill. longa. (Coll. Nr. 116.) 
Cyclostoma. Chittyi -4dams Contrib. to Coneh. N. 1. p. 1. N. 6. p. 89. 
-— — . Chemmn. ed, II. N. 374. t. 46. f. 13. 14. 
Choanopoma Chittyi Pfr. Consp. N. 231. 
Habitat in insula Jamaica. 
Obs. Differt a peraffini Ch. fhnbriatulo liris spiralibus multo confertiori- 
bus, in decussatione subspinoso-asperis, perist. interno porrecto et 
praesertim operculo! 
n 10. €h. senbriculum Sowerby. 
T. umbilicata, conoideo-globosa, vix decollata, tenuis, liris 
spiralibus confertis et lineis longitudinalibus confertioribus argute 
reticulata, fulvido-alba, interdum lineis rufis obsolete cincta; 
spira convexa; anfr. superst. 4-—4'/, rotundati, sensim accres- 
centes, ultimus teres, in umbilico mediocri, subcompresso, vix 
pervio distinctius et remotius spiraliter suleatus; apertura verti- 
calis, circularis; perist. duplicatum: internum breve, externum 
limbum tenuem, undique late expansum, superne sinuoso-auri- 
culatum, ad anfr. penultimum emarginatum, concentrice imbri- 
cato-striatum , undato-plicatum et fusco-radiatum formans. — 
Operc. testaceum, cinereum, extus concavum, nucleo subex- 
centrico, anfr. 4 oblique striatis, exzimo perdilatato, omnium 
margine a/fe elevato, superne expanso. — Diam. maj. li, 
min. 12, alt. 11 mill Ap. intus 6'/, cum limbo ll mill. 
jonga. (Coll. Nr. 117.) 
Cyclostoma scabriculum Som, 'Thes. N. 119. p. 133. t. 28. f, 147. *) 
*) T. globoso-conoidea, albida, spira breviuseula, decollata; anfr. 
