TUDORA $. 3. 955 
19. T.? erexuloss Adams. 
T. perforata, elongato-conica, solida, truncata, longitudi- 
naliter. confertim. costato - striata, coerulescenti-albida, fusculo- 
nebulosa et lineis rufis in ziczac flexis elegantissime picta ; 
sutura parum impressa, confertim denticulata; anfr. superst. 
9 parum convexi, ultümus basi fuscus; apertura verticalis, 
ovalis, superne subangulosa, intus livida; perist. duplex : inter- 
num expansum, appressum, rubrum, externum album, dilatato- 
expansum, superne et infra columellam angulatim productum. 
— Operc.? — Long. 21, diam. 9'/, mill. Ap. 6'/, mill. longa. 
(Mus. Cuming.) 
Cyclostoma crenulosum ,4dams Contrib. to Conch. N. 1. p. 12. *) 
Tudora? crenulosa Pfr. Consp. N. 372. 
Habitat in insula Jamaica. 
417 
20. '".? canescens Pfr. 418 
T. subperforata, oblongo-turrita, truncatula, solida, lineis 
longitudinalibus et spiralibus elevatis regulariter clathrata, 
parum nitida, griseo-albida; spira elongata; sutura tuberculis 
confertis albis crenata; anfr. superst. 7 vix convexiusculi, 
ultimus basi attenuatus, circa perforationem obsoletam distinc- 
tus spiraliter. suleatus; apertura verticalis,| angulato - ovalis, 
intus fusco-carnea; perist. duplex: internum vix porrectum, 
externum. undique breviter expansum, superne angulatum, 
anfractui penulümo breviter adnatum. -— Operc.? — Long. 
20, diam. 7 mill. Ap. 5 mill. longa, 4 lata. (Mus. Cuming.) 
Cuclostoma canescens Pfr. in Proc. Zool. Soc. 1851. Jul. 
— - Chemn. ed. II. N. 284. t. 38, f. 36. 37. 
Tudora canescens Pfr. Consp. N. 373. p. 65. 
Habitat . . .? 
*) Shell much elongated, conie; brownish sometimes with transverse 
darker elouds and &lender zigzag spots, with a band of the same around 
the anterior part; very coarsely striated transversely, the upper ends of the 
raised lines being developed into very numerous sutural crenulations, spiral 
lines wanting; spire with nearly rectilinear outlines; apex truncate with the 
loss of three whorls; five whorls remaining, with a moderately impressed 
suture, which. is nearly concealed by the erenulations; aperture ovate-orbic- 
ular; inner peritreme ,orange red, on the right side coalescing with the 
outer peritreme, which is white, moderately expanded, sharp, concave, more 
produced and inflected above and at the lower end of the left side; umbi- 
lieus very small. Mean divergenee 359; length 0,83; greatest breadth 0,45 ; 
least breadth 0,35 inch (Adams l. ec.) 
