268 NEW FOSSIL SHELLS 
I can find none of our species of Turbo to which this pretty little shell can be referred. 
With the same number of whorls, it is hardly more than a fourth the size of the T. 
caperatus, Con., which it in some degree resembles. And, in our species, the transverse 
strie are large, almost deserving the appellation of ribs, while in the T’. caperatus they 
are described as small. 
FAMILY CANALIFERID A. 
GENUS CERITHIUM. 
C. cuavunus, Px. 37. Fia. 89. 
C. testa turritd, valde elevatd, crassd, costatd, striatd; spird acutd, conicd, valdé attenuatd, mdmillatd; suturis linea- 
ribus, sub-obsoletis; anfractibus ——, planis; costis tribus, transversis, magnis, sub-acutis, levibus; striis longitudina- 
libus, raris, parvis; anfractu ultimo angulato; basi levi; aperturd quadratd; canali brevi, minimé profundo. 
Shell turrited, very elevated, thick, costate, striate; spire acute, conical, very attenuate, mamillate; sutures linear, 
almost obsolete; whorls , flat; ribs three, transverse, large, sub-acute, smooth; strie longitudinal, small, infre- 
quent; last whorl angular; base smooth; mouth quadrate; canal short, shallow. 
Length Breadth .15 of an inch. 
Remarks.—The longitudinal strie, from their size, although they do not cross the ribs, 
give the shell a cancellated appearance under the microscope. The mouth is nearly 
square. The body whorl has four instead of three striw, a very small one being placed 
immediately below the angle. 
This species bears a strong resemblance to the C. terebrale,* Adams, a recent shell 
from our coast, but it may be distinguished by having the transverse ribs fewer and 
more acute, the longitudinal strie less frequent and larger, and the canal longer and less 
profound. It also approaches the Terebra constricta, Nob., but the ribs are more flat- 
tened, and the strie# less numerous and larger. 
Although not thin, this shell is extremely fragile, as out of about fifty specimens I have 
not one full-grown one with the apex perfect. It attains a much larger size than that 
shown in the figure. 
C. curtum, Pu. 37. Fia. 90. 
C. testé elevato-conicd, tenui, sub-cancellatd, carinatd, sub-perforatd; spird breviusculd, aculd, ad apicem levi; 
suluris excavatis; anfractibus sex, medio carinatis; striis transversis et sulcis longitudinalibus vartabilebus; ultimo 
anfractu angulato; basi minute striatd; perforatione minima, aliquando obsoletda; apertura ovatd, superne angulatd, 
inferne valde effusd. 
Shell elevated conical, thin, sub-cancellate, carinate, sub-perforate; spire rather short, acute, smooth at the apex; 
sutures excavated; whorls six, carinate in the middle; transverse strie and longititdinia sulci variable; last whorl 
angular; base minutely striate; perforation very small, sometitnes obsolete; mouth ovate, angular above, very effuse 
below. 
Length .15. Breadth .06 of an inch. 
Remarks.—The longitudinal sulci are very variable, being sometimes almost obsolete, 
while at others they give the shell a completely cancellate appearance, cutting the stris 
* As the name of this shell has been preoccupied, by Lamarck, for a fossil species from Grignon, I propose that the 
name of the discoverer be affixed to it, changing it to C. Adamsii. I find also that the name of iia C. cancellatum 
Nob., has been used by the same author. I, therefore, change it to C, spina. ‘ 
