NO. 12 PERMIAN BRACHIOPODS FROM OREGON—COOPER 25 
CHONETINELLA sp. 1 
Plate 1E, figures 10, II 
Small, wider than long and with greatly extended ears; hinge 
forming widest part; sides sloping medially ; anterior margin broadly 
rounded ; surface marked by flattened costellae, about 5 costellae in 
I mm. at the anterior. 
Pedicle valve strongly convex in lateral profile; unevenly convex 
in anterior profile, with narrow, rounded but sulcate median region 
and long, concave lateral slopes. Umbo swollen; sulcus originating 
on umbo, narrow and deep; flanks bounding sulcus narrowly rounded ; 
lateral slopes concave. 
Brachial valve unknown. 
Measurements in mm.—uvU.S.N.M. 125468, length 9.6, midwidth 
14.7?, hinge width (based on half measure) 17.6, height 3.7. 
Type.—Figured specimen, U.S.N.M. 125468. 
Locality —S103. 
Discussion.—Like the other chonetids in the collection this one is 
poorly preserved and not complete along the anterior margin. It is 
very deeply sulcate and unlike any of the species figured by King 
(1930) from the Glass Mountains. The Oregon specimen is a much 
larger species than C. victoriana Girty from the Sierra Diablo, Texas. 
Chonetes uralica Moeller from Russia is suggestive in the young 
form but the adult loses the deep sulcus at the anterior. 
PAECKELMANNIA aff. CHONETES ALATUS Stuckenberg 
Plate 1C, figure 8 
Chonetes alatus StuCKENBERG, Mém. Com. Géol., St. Petersburg, vol. 16, No. 1, 
Pp. 353, pl. 5, figs. 1a-b, 1808. 
Shell small with the width about 34 times the length; cardinal 
extremities acute, mucronate; hinge forming the greatest shell width. 
Lateral margins sloping inward; anterior margin gently curved. 
Strongly convex in lateral profile; anterior profile broadly convex, 
most convex in median region with sides gently concave. Surface 
smooth. Interior of pedicle valve, when the shell is moistened, with 
a thin, short median septum. Two spine bases visible on the hinge. 
Measurements in mm.—Length 3.8, width 13.2, height 0.5. 
Type.—Figured specimen, U.S.N.M. 125316. 
Locality —S4lI. 
Discussion—The specimen described above is very suggestive of 
one figured by Tschernyschew (1902, pl. 56, fig. 8), an impression 
of the interior. This specimen, although larger than the Oregon one, 
