170 MISSISSIPPIAN BRACHIOPODA 



CAMAROPHORIA HAMBURGENSIS Weller 

 Plate XXIII, Figs. 52-60 



1910. Camarophoria haniburgensis Weller, Bull. Geol. Soc. Am., vol. 21, p. 

 500, fig. 2. 



Description. Shell below medium size, subovate in outline, the length 

 equal to, greater or less than the width, the greatest width near the mid- 

 length of the shell. The postero-lateral margins nearly straight, and 

 meeting at the beak in an angle, the lateral and anterior margins rounded. 

 The dimensions of a small but nearly perfect specimen are: length 9.4 

 mm., width 9.3 mm., thickness 5.5 mm. The dimensions of two detached 

 brachial valves are: length 10.5 mm. and 10 mm., width 13.5 mm. and 

 12.4 mm. 



Pedicle valve depressed convex in the posterior half and towards the 

 antero-lateral margins, more strongly arched from the beak to the ante- 

 rior margin, along the. postero-lateral margins the edge of the valve is 

 rather abruptly inflected towards the opposite valve to form a false car- 

 dinal area ; mesial sinus obsolete in the posterior half of the valve, orig- 

 inating near the middle and .continuing to, the anterior margin as a broad, 

 shallow, illdefined, regularly concave, depression, whose surface curves 

 towards the opposite valve anteriorly nd is a little produced in front as 

 a broad rounded extension ; beak rather large, a little incurved, pierced 

 by a subcircular foramen; delthyrium bro'adly triangular, nearly filled 

 by the beak of the opposite valve, its apex communicating with the fora- 

 men which encroaches upon the beak of the valve; plications depressed, 



O 



FIG. 2. A series of cross-sections of the rostral portion of the shell of Cam- 

 arophoria hamburgensis (X 2%); A to J the pedicle valve; K to T the 

 brachial valve. 



mostly simple, rather broad and rounded on top, originating at or near 

 the beak, from 16 to 22 in number, from 5 to 7 of which occupy the 

 mesial sinus, those towards the postero-lateral margins becoming faint or 

 nearly obsolete. Internally the hinge-teeth are supported by dental lam- 



