DEVONIAN FAUNAS. 315 
The dimensions of a specimen from the shaley member of the New 
Scotland beds are: length, 12 mm.; width, 19 mm. 
Remarks.—This species is present in the Coeymans lmestone 
fauna, but becomes much more abundant in the New Scotland fauna, 
attaining its greatest numerical prominence in the Becraft lime- 
stone. No specimens have been observed in New Jersey attaining the 
size of the larger examples illustrated in the New York Paleontology, 
but they possess all the characteristics of the species. In the hard, 
cherty limestones the delicate surface markings, both the concentric 
lamelle and their fine, marginal fimbriations have been destroyed, 
but upon some of the shale specimens these markings have been very 
perfectly preserved. 
TREMATOSPIRA MULTISTRIATA Hall. 
Plate XXXVIIL., Figs. 8-10. 
1859. Trematosmra multistriata Hall, Pal. N: Y., vol. III., p. 209, 
pl. 24, figs. 3 a-t, pl. 28 A, figs. 5 a-f. 
Description.—Shell transversely subelliptical in outline, hinge-line 
about two-thirds the greatest width, cardinal angles rounded. Pedicle 
valve rather strongly convex, beak incurved over that of the opposite 
valve, cardinal area narrow; mesial sinus broad, rounded in the bot- 
tom, ill-defined, sometimes, but not always, becoming obsolete before 
reaching the beak. Brachial valve usually a little more convex than 
the pedicle, the mesial portion elevated in front in an ill-defined, 
rounded fold. Surface of both valves marked by strong, subangular, 
raised, radiating strie, which bifurcate one or more times in passing 
from the beak to the front of the shell. These radiating markings 
are crossed by concentric lines of growth. 
The dimensions of an average-sized specimen are: length, 15 mm.; 
width, 24 mm. 
Remarks.—This species has been observed only in the shaley mem- 
ber of the New Scotland beds, where it often occurs in considerable 
abundance, but is usually very poorly preserved. 
