30 CYCLOTUS $. 9 
10. C. Cooperi Tryon. 1 
.lesta late umbilicata, globoso-turbinata, crassiuscula, 
epidermide cornea obtecta, stris incrementi crebris et sat pro- 
funde incisis notata; spira conoidalis, magis minusve depressa; 
anfr. 4!/, —D, convexi; peristoma simplex, rectum, acutum, 
junctione marginum vix angulata et anfractum adjacentem 
superne tangente; apertura. intus alba et nitida. — Opercu- 
lum? — Diam. maj. 16, min. 14, alt. 12 mill. Long. apert. 
(o muUub* (CL. angl.) 
Cyclotus Cooperi Tryon in Proceed. Ac. Philad. 1863. p. 281. t. 2. f. 92. 
— — . JBland in Amer. journ. Conch. II. 1866. p. 63. 
Habitat Cinaloa prope Mazatlan (A. Rémond). 
Obs. Species forma similis C. translucido 'Sow., sed latius umbilicata, 
textura crassiore et striis incrementi fortiter impressis distinguenda. 
11. C. Pazi Crosse. 
I. umbilieata, conoideo-subdepressa, solidula, parum 
crassa, longitudinaliter striata, sub epidermide sature olivaceo- 
fusca albida; spira mediocriter elevata, vertice rotundato, ro- 
saceo; sutura impressa; anfr. 4'/, convexiusculi, ad suturam 
depressi, 2!/; primi sublaeves, rosacei, ultimus ad peripheriam 
cingulo funiculiformi, vix prominulo obscure cireumdatus; 
umbilicus latiusculus, profundus; apert. obliqua, rotundata, 
livide albida; peristoma simplex, rectum, albidum, marginibus 
approximatis, callo erassiusculo junctis. — Operc. parum cras- 
sum, normale. — Diam. maj. 22, min. 18!/, alt. 11 mill.; 
apert. 9!/; mill. alta, 9 lata.* (C. — Coll. Nr. 8.) 
Var.; Testa epidermide viridi-lutescenti induta. 
Cyclotus Pazi Crosse in Journ. Conch. XIV. 1866. p. 356. t. 14. f. 3. 
— — Hidalgo Mol. viaje Pacif. p. 148. t. 8. f. 14. 15. 
Habitat Ambato reipublicae. Aequatoris. 
* 
12. spureus (Cyelostoma) Grat. I. 187 (Otopoma). II. 16. III. 14. — 
Cyclotopsis spurca. Dlanf. in Ann. and Mag. n. h. 3d. ser. XIII. p. 
464. — Malabar, Bombay. 
or chestnut bands; spire somewhat acuminate; whorls 5, convex; umbilicus 
broad and open; aperture slightly oblique, nearly circular; peristome blunt, 
its margins forming an angle above; right margin slightly sinuate. Operculum 
concave, with six obliquely striate whorls, the inner margins of which are 
raised. — Height 0,55 inch, greatest breadth 0,9 inch.* 
