CYCLOPHORIDA, 171 
y- With the spiral ridges very distant, linear. 
6. With the spiral ridges altogether wanting. 
Hab. The Island of Curacao. 
2. TUDORA COSTATA. 
Shell subperforate, oblong-turreted, truncate, seulptured with 
strong longitudinal folds or ribs, very obsoletely crossed by 
raised spiral lines, flesh-coloured, blueish towards the summit; 
whorls remaining 6, convex, the last one ascending anteriorly, 
closely grooved spirally and deeply at its base; aperture ovate, 
produced beneath, orange-coloured within; peristome simple, 
slightly expanded, with the upper margin dilated and vaulted ; 
columellar margin narrow and appressed above, almost covering 
the perforation, dilated and somewhat auriculated at its lower 
part. Operculum? Length 16, breadth 73 mill. 
Cyclostoma costatum, Menke, MSS.; Pfr. in Z. f. IL. 1846, p. 47; 
den. 59, p. 64, t. 9, f. 9, 10, 
Cistula? costata, Gray, Cat. Cyel. p. 58, n. 4. 
Tudora costata, Pfr. Consp. n. 356; Prneum. Mon. p. 244. 
Locality unknown. 
3. TUDORA VERSICOLOR. B. M. 
Shell narrowly rimate, oblong-turreted, truncate, shining, pale 
rose-coloured, girdled with orange-red lines; whorls remaining 
5, moderately convex, the upper ones closely ribbed, the middle 
ones smooth, the last forming 3? of the total length, ggncen- 
trically grooved beneath; aperture perpendicular, ovate-circular, 
saffron-coloured within; peristome simple, white, with the right 
margin nearly straight; columellar margin shortly reflexed. 
Operculum? Length 173, breadth 83 mill. 
Turbo aurantius, Gray, in Wood, Ind. Suppl. t. 6, f.23. (Not Schum.) 
Cyclostoma aurantium, Gray, in Wood Suppl. p. 36. 
Cyclostoma aurantiacum, Sow. Thes. n. 36, p. 103, t. 24. f. 46, 47. 
Cyclostoma versicolor, Pfr. in Z. f. M. 1846, p. 33; Ic. n. 60, p. 65, 
t. 9, £13, 14. 
Cistula versicolor, Gray, Cat. Cycl. p. 58,n.3% (Jamaica.) 
Tudora versicolor, Pfr. Consp. n. 357; Pneum. Mon. p. 244. 
8. Shell more solid, decussated closely and obsoletely, rose-coloured, 
varied with pink. 
Cyclostoma carneum, Menke, in Pfr. Ic. nu. 61, p. 65, t. 9, f. 11, 12. 
Locality unknown. 
This species and the preceding appear to be most allied to 
Tudora megachila. 
