218 
CYCLOSTOMUS §. 6. 
vix obliqua, subcircularis ; perist. simplex, acutum, marginibus 
approximatis, clextro recto, colnmellari medio dilatato, subre- 
flexo. — Operc. ? — Diam. maj. 12, min. 10, alt. 12 mill. 
Ap. 7 mill, longa. (Mus. Cuming.) 
Cyclostoma Carolinense Pfr. in Proc. Zool. Soc. 9 Dec. 1851. 
— — Chemn. ed. II. N. 344. t. 43. f. 10. 11. 
Cyclostomus Carolinensis Pfr. Consp. N. 318. p. 63. 
Habitat in insulis Carolinis. 
361 48. C. tenuis Sowerby. *j- 
T. globoso - pyramidalis , tenuis, albicans, opaca; spira 
acuminatiuscula , apice obtuso; anfr. 5 — 6 rotundati, postice 
spiraliter substriati, ultimus fulvo - unifasciatus , antice laevis; 
sutura profunda; apertura rotundata; peritrema tenue, subre- 
flexum; umbilicus mediocris. (Sow.) — Operc.? — Long. 15, 
diam. 9 mill. Ap. 6'/. 2 mill, longa. (Ex ic.) 
Cyclostoma tenue Sow. Thes. N. 134. p. 138. t. 31. f. 265. 
— — Chemn. ed. II. N. 190. p. 174. t. 25. f. 11. (Ex Sow.) 
Cyclostomus tenuis Gray Catal. Cycloph. p. 44. N. 9. 
— — Pfr. Consp. N. 319. 
Habitat in Africa (Gray). 
362 49. €?. cincinnus Sowerby. 
T. anguste umbilicata, conica, tenuis, spiraliter confertim 
et subtiliter lirata, albida unicolor vel linea 1 fusca infra peri- 
pheriam cincta; spira conica, apice obtusiuscula ; anfr. 5 con- 
vexi , ultimus medio sublaevigatus , basi circa umbilicum vix 
pervium confertim sulcatus ; apertura fere verticalis , subcircu- 
laris; perist. simplex, acutum, marginibus fere contiguis, colu- 
mellari reflexiusculo. — Long. 11, diam. 7 l /.f mill. Ap. 5 V 2 
mill, longa. (Mus. Cuming.) 
Cyclostoma cincinnus Sow. in Proc. Zool. Soc. 1843. p. 60.*) 
— — Sow. Thes. N. 32. p. 102. t. 24. f. 77. 78. 
— — Chemn. ed. II. N. 140. p. 134. t. 18. f. 1—3. 
— modestum Fer. mss. in Mus. Brit. 
*) T. suborbiculari, subturrita, tenui, albida, interdum fusco-unifasciata ; 
anfr. 5. rotundatis , postice spiraliter sulcatis , sulcis subdistantibus , antice 
spiraliter striatis ; sutura distincta; apertura circulari; peritremate tenui, 
versus umbilicum parvum subrellexo ; apice obtusiusculo. (Sow. 1. c.) 
