30 
CYCLOTUS §. 2. 
10 . C. Cooperi Tryon. t 
„ Testa late umbilicata, globoso - turbinata , crassiuscula, 
epidermide cornea obtecta, striis incrementi crebris et sat pro- 
funde incisis notata; spira conoidalis, magis minus ve depressa; 
anfr. d 1 /^ — 5, 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. 
7 mill." (T. angl.) 
Cyclotus Cooperi Tryon in Proceed. Ac. Philad. 1863. p. 281. t. 2. f. 2. 
— — Bland in Amer. jonrn. Conch. II. 1866. p. 63. 
Habitat Cinaloa prope Mazatlan (A. Hem on d). 
Obs. Species forma similis C. translucido Sow . , sed latius umbilicata, 
textura crassiore et striis incrementi fortiter impressis distinguenda. 
ii. C. Pazi Crosse. 
„T. umbilicata, conoideo - subdepressa , solidula, parum 
crassa, longitudinaliter striata, sub epidermide sature olivaceo- 
fusca albida; spira mediocriter elevata, vertice rotundato, ro- 
saceo; sutura impressa; anfr. 4^4 convexiusculi , ad suturam 
depressi, 2*/ 2 primi sublaeves, rosacei, ultimus ad peripheriam 
cingulo funiculiformi , vix prominulo obscure circumdatus ; 
umbilicus latiusculus , profundus ; apert. obliqua , rotundata, 
livide albida; peristoma simplex, rectum, albidum, marginibus 
approximate, callo crassiusculo junctis. — Operc. parum cras- 
sum, normale. — Diam. maj. 22, min. 18 1 / 2 , alt. 11 mill.; 
apert. 9*/ 2 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. spurcus (Cyclostoma) Grat. I. 187 (Otopoma). II. 16. III. 14. — 
Cyclotopsis spurca Blanf. 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 f 
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." 
