THE NAUTILUS. 135 
A NEW SUBGENUS OF CORALLIOPHAGA. 
BY W. H. DALL. 
Oryctomya n. subg. 
Shell with the form of Coralliophaga, the surface with radiating 
very fine lines of minute granulations as in Eucharis; hinge with 
one slender, transverse, more or less trifid cardinal in each valve, 
that in the left valve larger, and a slender almost linear tooth on 
the anterior lower surface of the nymph in each valve; an obscure 
projection on the cardinal margin in front of the cardinal in the left 
valve; no lateral teeth; pallial sinus short, angular, the adductor 
scars large and strong, the inner margins of the valves plain. Type 
C. (0.) elaibornensis Dall. 
This subgenus differs from Coralliophaga in its surface and den- 
tition, and has the pallial sinus more distinct and angular. It has 
the boring habit, the valves are therefore often irregular, the younger 
ones are thinner, more regular, and with the adductor scars less 
evident. Coralliophaga prima Harris (Bull. Pal. 1X, p. 60, pl. 18, 
figs. 4, 5, 1897), from the Lignitic, may be congeneric, but I have 
seen no specimens, and the dentition is different according to the 
description. 
C. (Oryctomya) claibornensis Dall. 
Shell elongate oval with low beaks, quite anterior, moderately 
inflated, somewhat mesially impressed; surface with incremental 
lines which in senile specimens sometimes become lamellose near the 
posterior end; radial sculpture of rows of small globular granules 
easily worn off and almost microscopic; ends rounded, the posterior 
broader ; hinge teeth delicate, somewhat pedunculate and slender in 
the adult; pallial sinus not extending in front of the posterior ad- 
ductor scar ; pallial line in senile specimens radially striated. 
Lon. 36, alt. 19, diam. 14 mm. 
Claiborne sands, at Claiborne, Ala., Burns. 
This species is readily recognized by its peculiar surface. It will 
be illustrated in a publication now in press. 
NOTES AND NEWS. 
How Can He CLean’em?—A collector asks “ How can I get 
the livers out of my shells? Is there an acid that will eat liver and 
