Tertiary. | PALZONTOLOGY OF VICTORIA. [Mollusea. 
Pirate XLII, Fias. 1, 2, 3. 
WALDHEIMIA CORIOENSIS (McCor). 
{Genus WALDHEIMIA (tine). (Sub-kingd. Mollusca, Class Palliobranchiata. Order 
Brachiopoda, Fam. Terebratulide). 
Gen. Char.—Suboyate, beak of larger valve truncated by a foramen separated from the 
curved hinge-line by a deltidium ; entering valve with a median rostral boss, from which a 
strong mesial septum extends towards the front. Loop reaching about two-thirds the length of 
the shell with a long recurved portion forming the only junction of the apophyses of both sides. 
The very long recurved loop and the distinct septum in middle of entering valve readily 
separate this genus from Terebratula. ] 
Description. —Subovate, greatest width about the middle of the length, 
margin of sides convex in middle, becoming straight or slightly concave towards 
the narrow rounded front; receiving valve very convex or very obtusely carinated 
along the middle (in very old specimens the middle becomes concave near the front 
margin, dividing the mesial convexity into two indistinct obtuse wide ridges), sides 
flattened, very slightly convex, becoming 
slightly concave near the lateral margins ; y 
perforation of beak moderate, deltidium tri- 
partite, the narrow middle portion convex, 
lateral portions flat; rostral ridyes moderate, 
angulated, entering valve flattened in the 
rostral half, with the lateral margins abruptly 
deflected nearly at right angles towards the 
receiving valve, becoming gradually depressed 
in the middle towards the narrowed front (in 
old specimens the mesial depression becomes 
divided by a wide slight convexity, corre- 
sponding to the mesial marginal concavity of 
opposite valve) ; profile of receiving valve 
much arched near the large incurved beak, 
becoming tangentially straight towards the 
front, which is elevated at the margin into a 
deep sinus (bisinuate when old); profile of 
entering valve much arched from beak to the 
much and abruptly inflexed front margin, 
which is depressed to fill the sinus in the 
opposite valve; lateral margins simple, with 
an abrupt wide convex curve beyond the 
middle on each side where the margins rise 
to form the front sinus. Surface smooth 
with moderate lines of growth. Substance of 
valves thick, mesial septum about one-half 
the length of the shell. Length of large 
specimens, 2 inches 8 lines; proportional 
dongth of entering valve, 1°53 width, 7'yq to 
roo 3 depth of receiving valve, yy to yoo, ate: 
usually Too 5 depth of entering valve, yoo: Side and rostral views, natural size, of large specimen. 
[11] 
