CYCLOTUS $.1. |. 99 
Cyclostoma: subrugosum Sow, 'Thes, Suppl. N. 186, p. 161*. t. 31 B, 
f 308. 309. *) 
— uh ed Chemn. ed. Il. Cycl. N. 334. t. 42, f. 19, 20. 
Cyclotus subrugosus Pfr. Consp. N. 21. 
Habitat in insula Jamaica. 
22. €. Buffianus Adams. 1 48 
T. magna, discoidea, rubella albaque; anfr. 4'/, um 
dracei ; umbilicus latus, profundus; margo simplex. 
— Diverg. 150"; lat. max. 1,9, lat. min. 1,45, alt. 0,87" TF Ad.) 
Cyclostoma Duffianum Adams in Proc. Bost. Soc. 1845. p. 11 
Aperostoma Duffianum Pfr. in. Zeitschr. f. Mal. 1847. p. 104. 
Cyclotus? Duffianus Gray Catal Cycloph. p. 7. N. 5. 
c — Pfr. Consp. N 22. 
Habitat in insula Jamaica. 
283. €. ernssus Adams. 49 
T. umbilicata, conoideo-depressa, solida, confertim striata, 
virentü-fusca vel saturate brunnea; spira breviter conoidea, 
apice lutescens, acutiuscula; sutura mediocris; anfr. 5 con- 
vexi, ultimus obsolete spiraliter striatus, superne leviter cor- 
rugatus, basi convexiusculus, circa umbilieum mediocrem vix 
vel non compressus; apertura obliqua, angulato-ovalis, intus 
livida, nitida; perist. continuum, breviter adnatum, marginibus 
angulo subacuto junctis, dextro recto, simplice, sinistro in- 
crassato, subreflexo. —  Operc. immersum, (-spirum, lamina 
spirali elevata, brevissime reflexa. — Diam. maj. 18, min. 15, 
alt. 10 mill. Ap. 10 mill. longa, 8 lata. (Coll. Nr. 15.) 
Cyclostoma crassum ;4dams Contrib. to Conch. N. 8. p. 143. 
— — Chemn. ed. II. Cycl. N. 359. t. 44. f. 14— 16. 
Cyclotus crassus Pfr. Consp. N. 23. 
Habitat Manchester insulae Jamaicae. 
24. €. perpailidus Adams. 50 
T. umbilicata, subturbinata, subtiliter rugoso - striata, 
albida, epidermide pallide virenti - fusca induta; spira modice 
3) od t guBOHDI ORIG. depressa, rugulosa, alba; spira depressa, obtusa, 
apice prominulo; anfr. 4 rotundatis, postice depressiusculis ; sutura distincta, 
linea obsoleta subsuturali notata; apertura fere circulari; peritremate pos- 
tice subincrassato, intus prope umbilieum,, tenui, ab ultimo anfractu dis- 
juneto; umbilico magno, antice carinato. (Sow. l. c.) 
