BRACHIOPODA — TELOTREMATA. 295 



274. H. cuboides (Sowerby). (Fig. 366, a-d.) Devonic. 

 Pedicle valve slightly less convex than the brachial and abruptly 



depressed in a broad deep sinus. Umbo moderately elevated with 

 minute and closely appressed beak. Brachial valve very gibbous 

 with a defined mesial fold reaching above the middle of the shell 

 and sharply truncate in front, bearing 6 or 7 plications. Whole 

 surface covered with plications which are crossed by fine concen- 

 tric striae. 



Tully of New York, Manitoba ; Europe. 



LXXXII. Pugnax Hall and Clarke. 

 Pedicle valve shallow with a deep median sinus. Brachial valve 

 deep with a much elevated median fold. Plications on lateral 

 slopes often obscure. Otherwise resembling HypotJiyris. Upper 

 Devonic-Carbonic. 



275. P. pugnus (Martin). (Fig. 366, e-f.) Upper Devonic. 

 Transversely ovate, i. e., wider than long. Pedicle valve with 



small, much incurved beak. Each valve has 9-14 plications which 

 become obsolete as they approach the umbo ; lrom 3-6 occupy 

 fold and sinus. Length and breadth about 1 by 1 y 2 inches. 

 New York, Nevada, Texas, Northwest Territory. 



276. P. striatocostata (Meek and Worthen). Mississippic. 

 Subpentagonal, moderately gibbous, with length and breadth 



about equal. Plications 9 to 1 1, broad and distinct, all except the 

 outer ones extending nearly to the umbos. Whole surface covered 

 with distinct radiating striae and fine concentric lines. 

 Kinderhook of Missouri. 



277. P. grosvenori Hall. (Fig. 366, g-h.) Mississippic. 

 Subglobose. Beak of pedicle valve small and nearly straight ; 



that of brachial valve obtuse and closely incurved, meeting the 

 opposite valve nearly at a right angle. Sur- 

 face marked by 14-18 plications about 5 of 

 which mark fold and sinus. 



St. Louis of Kentucky, Indiana, Illinois. 



278. P. utah (Marcou). (Fig. 367.) 



Carbonic. 

 Small, emarginate anteriorly. Plications 

 angular, rarely exceeding 9 in number, of which 2-3 are on sinus 

 and fold. 



