Weller—Paraphorhynchus, Genus of Kinderhook Brachiopoda. 261 
into the cavity of the shell as a crural process, and the 
median septum also continues forward towards the front of 
the shell beyond the cruralium-like hinge-plate. Cardinal 
process wanting. Shell structure fibrous, not punctate. 
The members of this genus differ exteriorly from Pugnax 
with which they have usually been placed, in the longitudi- 
nally striated shell surface, and in the more strongly plicated 
shell with the plications extending nearly to the beak. In- 
ternally the characters of the shell resemble Camarotoechia 
rather than Pugnaz, the strong median septum of the brachial 
valve with its cruralium-like hinge-plate being absent in the 
typical forms of Pugnazx. 
PARAPHORHYNCHUS ELONGATUM, 0. sp. 
Pl. 1. f. 1-5. 
Shell longer than wide, broadest in front of the middle, 
in the posterior region both valves are convex, the fold and 
sinus of the mature shell originating at or back of the middle 
of the shell, in the posterior half of the shell the lateral sur- 
faces are flattened and non-plicate, the flattened area becom- 
ing concave as it approaches the beaks, the line of junction 
between the two valves being in the bottom of the concavity. 
The coarser surface markings consist of from ten to fourteen 
rounded radiating plications, twelve being the usual number, 
with a few concentric lines of growth which are often nearly 
or quite obsolete. In rare instances one of the radiating 
plications is seen to bifurcate in the anterior portion of the 
shell. The five median plications are usually depressed in the 
sinus of the pedicle valve with a corresponding number ele- 
vated in the fold of the brachial valve, the two lateral plica- 
tions in both fold and sinus frequently becoming obsolete 
before reaching the anterior margin. The minute surface 
markings consist of fine radiating striae and _ still finer 
concentric striae. The radiating striae can be clearly seen 
with the naked eye, four or five of them occupying the space 
of one millimeter, they are nearly or quite obsolete upon the 
flattened lateral surfaces of the valves. The concentric 
striae are much finer and can only be seen with the aid of a 
