4 
outside, when unaccompanied by other more important cha- 
racters. The shell.in Lot 428 is quite destitute of the little 
nodules which are sometimes scattered on the strie; in 
others the striz are very strong; while, insome, they assume 
the form of distant, unequal wrinkles diverging from the 
spire. The perforations are, however, always destitute of 
the broad parallel groove (usual in this genus), which 1s 
generally between the perforations and the outer lip. The 
spire indicates a connecting link between the two divisions 
of the genus ; viz. one having the spire small, and the other 
large. 
CASSIS RINGENS. 
(Lot 41 and 393.) 
C. (div. 1.) testd pallidd, transversé costatd, costis sulco-lineatis ; 
labio exteriore dentibus transversis, interiore, dentibus erga basin 
validis, armato, dentium serie profunde divisd, margine simplici. 
Shell pale, transversely ribbed, the ribs with an impressed line ; 
outer lip with transverse teeth; inner lip with two sets of strong 
teeth near the base, divided by a deep notch; the margin 
simple. 
A veERY singular and uncommon species, which appears, 
hitherto, unnoticed by any writer; the usual size is very 
large. It belongs to that division of the genus which con- 
nects Cassis with Dolium, having the form and ribbed exte- 
rior of the latter genus, united with the strongly toothed 
aperture of the former. 
