86 PROCEEDINGS OF THE NATIONAL MUSEUM. VOL. XXXIV. 
presence of cardinal and lateral teeth; general form of the shell; and 
well defined muscular scars. In P. lineata the radial sculpture covers 
the body, wing, and ears of the left valve; in the right valve the 
radial markings are restricted to the posterior wing. 
Erecting this group into generic rank it is proposed to call it 
Tolmaia.* Frech included as representative species in the group the 
species Pterinea lineata Goldfuss (with Pterinea elongata Goldtfuss, 
P. plana, exparte, f. 4, P. lineata Goldfuss of Sandberger, Roemer 
and Follmann, and Psewdomonotis minuta Maurer, as synonyms of 
P. lineata) and the species Avicula expansa Maurer as emended by 
rechsg | 
In describing the “ gruppe ” as a genus and applying to it a definite 
generic name it is intended to adopt as much as possible of Frech’s 
definition. 
TOLMATA, new genus. 
Type.—P. lineata Goldfuss. 
Diagnosis —A Pterinoid shell of medium size, the anterior ear 
inconspicuous (“vorderes ohr undeutlich”); fine radial sculpture 
marking the surface of the shells (“radial streifen fein”); com- 
bined with the following characters which the genus holds in common 
with Pterinea Goldfuss as here emended; namely, valves inequivalve ; 
left valve convex but less so than in group of Pterinea costata; right 
valve less convex than left and flat to concave (that is, resupinate) 
toward its ventral end; both anterior ear and posterior wing present ; 
hgamental area longitudinally striate; cardinal teeth short and 
radial; lateral teeth (or tooth) oblique, situated near junction of 
wing and body; anterior muscular scar well defined, small and 
situated on the anterior ear. The type species is from the Upper 
Coblenzian, Coblenz, Germany. The species Pterinea (Pterino- 
tella?) incurvata Clarke may belong to this genus. 
A NEW GENUS FOLLMANNELLA PROPOSED FOR PTERINHAS OF THE 
GENERAL FORM OF P. OSTREIFORMIS FRECH. 
In the “gruppe der Pterinea ventricosa” Frech included a new 
species described by him under the name Pterinea ostreiformis. 
This species differs from P. ventricosa in having fine radial lines 
on the left valve and in other ways. Specimens from Maine offer 
superficial resemblance to Frech’s species, but differ from both the 
genus Micropteria Frech and the species Pterinwa ostreiformis Frech. 
A Maine specimen has already been figured, and specifically named 
by Clarke Pterinea mainensis,¢ which will serve as a type for this new 
4¥Wrom the Greek todya, signifying boldness or courage. 
6 Frech, Die devonischen Aviculiden Deutschland, pp. 90, 91. 
© Some new Devonic Fossils, N. Y. State Mus. Bull., No. 107, 1907, p. 201. 
