84 PROCEEDINGS OF THE NATIONAL MUSEUM. VOL, XXXIV. 
11. P. reticulata, a species of Actinopterella, new genus. 
12. P. trigona, Conocardium trigona. 
13. P. costata, a species of Cornellites, new genus. 
14. P. fasciculata, the type of Cornellites, new genus. 
Of the above list, numbers 2, 3, 7, 8, 9 and 12 are already recognized 
by authors as not included in Goldfuss’s genus Ptertnea. The dispo- 
sition of them and the other species is indicated above at the right of 
the list of names. 
Of the original species described by Goldfuss under the generic 
name Pterinea the following are without radial surface sculpture: 
Pterinea levis, P. ventricosa, P. bicarinata, P. plana (in part as 
represented by figs. 4 6, ¢, d, e and f, not 4 a). 
Pterinea lwvis is the first species described and well illustrates the 
genus. It is the type of the section of Ptertnea in which there is no 
radial sculpture,’ and may appropriately be taken as the type of the 
genus as emended. 
Genus PTERINEA Goldfuss (sensu stricto). 
Type.—Pterinea laevis Goldtuss. 
Diagnosis —I|. Hinge line long. 
2. Valves equal in circumference but unequal in convexity; both 
more or less convex; the left valve always convex; the right valve in 
first half of growth convex but less so than the left, and low convex 
to flat or concave (resupinate) 1n the ventral part of shell at maturity. 
3. Ears well developed, more or less distinctly differentiated from 
the body of shell, reaching to or in front of the extreme anterior edge 
of the body of the shell. 
4. Wings more or less distinctly differentiated from the body, 
flattened, reaching posteriorly as far as the extreme posterior margin 
of the shell. 
5. Body of shell with its longer axis produced ventrally at a con- 
siderable angle from the hinge line. 
6. Posterior muscular scar distinct, large and more or less sharply 
impressed in the shell wall. 
7. Anterior muscular scars small and generally strongly impressed, 
situated on the ear, not body, of the shell. 
8. Ligamental area well defined and longitudinally striate. 
9. Posterior lateral teeth (or tooth) distinct, elongate, and situated 
at or near the junction of wing with the body of the shell. 
10. Anterior cardinal teeth distinct, short, separated from the 
lateral teeth, and inclined at large angle from hinge line. 
a@¥rech’s ‘“‘ gruppe der Pterinwa levis,” Die devonischen Aviculiden Deutsch- 
land; Konigl. Preusch. Geol. Landesanstalt, Abhandl., IX, Pt. 3, 1891, p. 79-80. 
