BULLETIN OF THE LABORATORIES 
rior and lateral margins of the pygidium, the last pair bordering upon the 
grooves which divide the mesial from the lateral lobes. The last pair of 
lobes, together with the posterior border, give the mesial lobe the 
peculiar appearance of terminating in a box, or rather an enclosure 
which is bounded on two sides by raised lines almost parallel, and on 
the third side by the posterior outline of the pigidium. 
The size is readily enough obtained from the figures and from the 
description of the form formerly described under C. Blumenbachii. 
Associated with these specimens are others of smaller size, de- 
scribed under a separate heading in the first paper, but now believed 
to be identical. They vary from the typical forms in possessing a less 
distinct groove along the anterior edge of the glabella, the groove 
almost merges into the flattened surface of the anterior border, the 
tubercles at the junction of the lateral and glabellar furrows are scarce- 
ly visible, often obsolete and the border appears raised at a somewhat 
higher angle. However, it is now believed that the larger specimens 
present the features of the smaller forms in a very marked degree, 
magnifying their characteristics so as to seem distinct. 
Lieut. A. W. Vogdes finds a form at Catoosa Station, also in the 
Hematitic bed at Dug Gap, Clinton Group, Georgia. This he identi- 
fied with Calymene Clintoni, Vanuxem. Expressing the belief that the 
Ohio specimens should be referred to the same species, he requested 
the loan of my specimens, and sent me his in return. The identity of 
his specimens with mine is apparent. The anterior border has been 
flattened down by pressure, the groove anterior to the glabella is thus 
made indistinct, the irregularities of the border immediately in front 
of the groove appear as indistinct low tubercles, or rather an uneven 
raised line is formed defining the groove immediately anterior to the 
glabella. 
Since Lieut. A. W. Vogdes had access to the type specimens of 
Calyjnene CUntoni, at the Am. Mus. of Nat. Hist., Central Park, N. Y. 
and I doubted the identity of Ohio forms with these, I requested him 
to compare the specimens, and give me an expression of his opinion. 
He did so very kindly and thoroughly. Considering the very great 
similarity of the species of Calymene, and the synonomy to which this 
leads, it is considered desirable to distinguish a new species carefully 
from all others with which it might be associated. The following 
notes are therefore extracted from the correspondence of Lieut. A. W. 
Vogdes. 
