PALEOZOIC PALEONTOLOGY. 
caw) 
io) 
(0/4) 
is preserved an imperfect cast of the spicular framework. Such speci- 
mens show a strong resemblance to a small, globular, Favosite coral. 
According to Girty, the size of the species has a considerably-greater 
variation than that indicated by Hinde, the specimens he studied 
ranging from 6 mm. to 64 mm. in diameter. The New Jersey speci- 
mens are usually from 15 mm. to 20 mm. in diameter. 
ANTHOZOA. 
STREPTELASMA STRICTUM Hall. 
Plate XXXIIIL., Figs. 3-4. 
1887. Streptelasma strictum Hall, Pal. N. Y., vol. VL, p. 1, pl. 1, 
figs. 1-10. 
Description.—“Corallum simple, conical, very gradually and regu- 
larly enlarging; straight or very slightly curved, except at the apex, 
which is sometimes more abruptly bent. Exterior marked with strong 
undulations of growth and numerous, fine, concentric striae; external 
rays very prominent, from forty-five to fifty at a point where the 
diameter of the corallum is 15 mm., the increase in numbers taking 
place usually at three distinct points, but sometimes at only two. 
Calyx deep, sides thin and nearly erect; a flat space at the bottom. 
In one calyx, having a diameter of 20 mm., there are fifty-four 
lamelle; alternate lamelle extending only a short distance from the 
walls at the base of the calyx and frequently coalescing with the 
primary lamelle. For some distance below the calyx-margin the 
lamelle are of the same size, their edges smooth and rounded, be- 
coming sharp below, and their sides often distinctly. granulose or 
spinulose. The primary lamelle unite and coalesce at the centre of 
the calyx, forming an indistinct plate or vesiculose core from 3 to 5 
mm. in diameter. Fossette obscure or obsolete. This species is dis- 
tinguished by the usually rigid straightness of its form and the 
strongly-ribbed exterior.”—//all. 
