218 CYCLOSTOMUS &. 6. 
vix obliqua, subeireularis; perist. simplex, acutum, marginibus 
approximatis, dextro recto, columellari medio dilatato, "subre- 
flexo. — Operc.? — Diam. maj. 12, min. 10, alt. 12 mill. 
Ap. 7 mill. s. (Mus. Cuming.) 
Cyclostoma Carolinense Pfr. in Proc. Zool. Soc. 9 Dec. 1851. 
— UE Chemn. eà. II. N. 344. t. 43. f. 10. 11. 
Cyclostomus Carolinensis Pfr. Consp. N. 318. p. 63. 
Habitat in insulis Carolinis. 
361 48. €. tenuis Sowerby. 1 
T. globoso-pyramidalis, tenuis, albicans, opaca; spira 
acuminatiuscula, apice obtuso; anfr. 5—6 rotundati, postice 
spirahter 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'/, mill. longa. (Ex 1c.) 
Cyclostoma tenue Som. 'Thes. N. 134. p. 138. t. 31. f. 265. 
L— —  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). 
3692 49. €. cincinnus Sowerby. 
T. anguste umbilicata, conica, tenuis, spiraliter confertim 
et subtiliter lirata, albida unicolor vel linea 1 fusca infra perni- 
pheriam cincta; spira coniea, apice obtusiuseula; anfr. 5 con- 
vexi, ultimus medio sublaevigatus, basi cirea umbilicum. vix 
pervium confertim suleatus; apertura fere verticalis, subcircu- 
laris; perist. simplex, acutum, marginibus fere contiguis, Col 
mellari reflexiusculo. — Long. 11, diam. *7'/, t: Ap. 
mill. longa. (Mus. Cuming.) 
Cyclostoma cincinmus Som. in Proc. Zool. Soc. 1843. p. 60. *) 
— — Som. 'Thes. N. 32. p. 102. t. 24. f. 77. 78. 
— — Chemn. ed. II. N. 140. p. 134. t. 18. f. 1—3. 
— modestum Fér. mss. in Mus. Brit. 
*) T. suborbiculari, subturrita, tenui, albida, interdum fusco-unifasciata ; 
anfr. 5 rotundatis, postice spiraliter suleatis, sulcis subdistantibus, antice 
spiraliter striatis; sutura distincta; apertura circulari; peritremate tenui, 
versus umbilicum parvum subreflexo; apice obtusiusculo. (Sow. l. c.) 
