CYCLOSTOMUS §, 10. 
235 
73. C. Jayanus Adams* 386 
T. profunde rimata, ovato-conica , solidiuscula, longitudi- 
naliter confertim plicata, parum nitida, albida, strjgis latis, 
obliqais, angulosis vel fasciis interruptis fuscis ornata; spira 
elato-conica, vix truncatula vel integra; sutura superne minute 
denticulata, anfractuum inferiorum subsimplex; anfr. 4% — 6 
convexi , ultimus rotundatus , basi ultra axin subproductus ; 
apertura vix obliqua, subcircularis, intus nitida, fulvida, nebu- 
losa ; perist. duplex , lateritium , album vel fuscum : internum 
continuum , late expansum , appressum , externum latius, hori- 
zontaliter patens, superne sinuato-aiigulatum, ad anfr. penulti- 
mum breviter interruptum. — Operc. praecedentium. — Long. 
20, diam. 11 mill. Ap. intus 7 mill, longa. (Coll. Nr. 161.) 
Cyclostoma solidum Adams Contrib. to Conch. N. 1. p. 7. *) Ncc Menke. 
— Jayanurn Adams Ibid. N. 4. p. 50. 
— — Chemn. ed. II. N. 310. t. 40. f. 32. 33. 
— histrio Pfr. in Proc. Zool. Soc. 1851. Jul. 
Cyclostomus Jay anus Pfr. Consp. N. 345. 
Habitat in insula Jamaica. 
74. C. §owerby. 387 
T. breviter rimato -perforata, ovato-conica, tenuiuscula, 
longitudinaliter confertissime plicatula (plicis interdum undu- 
latis , nonnullis subregulariter distantibus validioribus) , pallide 
fuscescens, aurantio-strigata, vel nigro-coerulea, lineis inter- 
ruptis rufis obsolete cincta ; spira conica , truncatula ; sutura 
crenulata; anfr. superst. 3% convexi, ultimus rotundatus, an- 
tice fusco-aurantiacus, circa umbilicum angustissimum spiraliter 
sulcatus; apertura verticalis, circularis, intus sanguinea; perist. 
sanguineum , duplicatum : internum expansiusculum , externum 
breviter expansum , ad anfr. penultimum breviter excisum, 
*) Shell long, ovate -conic; whitish or brownish, with several narrow 
more or less interrupted sometimes nearly obsolete spiral brown lines, often 
with large irregular zigzag oblique spots of dark brown ; with very closely 
set strong rounded transverse raised lines , which are a little larger in twos 
and threes at the summit like a minute crenulation; spire with moderately 
convex outlines ; apex truncate with the loss of two whorls ; four and one- 
half whorls remaining, quite convex, with a well impressed suture; aperture 
nearly circular; inner peritreme slightly produced and reflected; outer peri- 
treme broad, white or pale yellow, a little concave, widest above and on the 
left side at the bottom of which it is subangular; umbilicus very small. 
Mean divergence 50®; length 0,78; greatest breadth 0,55, least breadth 0,4 
inch. (Adams 1. c.) 
