380 PALEOZOIC PALEONTOLOGY. 
BRACHIOPODA. 
ORTHOTHETES PANDORA (Bill.). 
Plate LIII., Fig. 6. 
See, also, pp. 367 and 373. 
A few species of Orthothetes from Greenwood lake may be referred 
provisionally to the species O. pandora. The specimens are all imper- 
fect and much distorted, so that in all of them the characters are more 
or less obscure. 
CHONETES CORONATUS (Con.).? 
Plate LIII., Fig. 5. 
1867.. Chonetes coronata Hall, Pal. N. Y., vol. IV., p. 133, pl. 21, 
figs. 9-12. 
A few distorted specimens of a flat, subelliptical brachiopod shell, 
some of which seem to retain the bases of cardinal spines, may be 
referred with doubt to the species Chonetes coronatus. If the shell 
really possesses cardinal spines and is a true Chonetes, then its size 
and rather coarse, radiating markings correspond more closely with 
the characters of C. coronatus than with any other species of the genus. 
This identification must remain doubtful, however, because of the 
imperfection of the material for study. 
CHONETES sp. undet. 
Plate LIIL., Fig. 4. 
A single distorted specimen of a rather large species of Chonetes 
has been collected at the Greenwood lake locality. Its width along 
the hinge-line is 14 mm. and the length of the shell is 9 mm. The 
surface is marked by very finé, radiating strie, and from one end of 
the cardinal margin a spine, 6 mm. in length, extends at nearly right 
