REVISION OF SPECIES REFERRED TO GENUS BATHYURUS 
55 
Bathyurus glandicephalus, Whitfield. 
Bathyurus ( Bathyurellus ) glandicephalus , Whitfield, 1890. 
Bulletin American Museum Natural History, Vol. Ill, p. 38, 
PL II, figs. 9*-13. 
This species occurs in the highest part of the Beekmantown 
in the Champlain valley (Bed E of Brainerd and Seely), and is a 
true Bathyurus. It is characterized by its very narrow glabella, 
and both the glabella and the axial lobe of the pygidium are 
rather low and smooth. The surface seems to be entirely without 
granules or pustules, and is marked by very fine but close-set 
wrinkles. On the pygidium the border is wide, and the ribs do 
not cross it. The species is more closely allied to B. amplimar - 
ginatus than to any other species of the genus, these two being the 
only ones in which the ribs do not cross the border and reach 
nearly or quite to the margin. 
Whitfield evidently intended to place this species in Bathy- 
urellus, but failed to understand the salient character of that 
genus, namely, the very concave and extremely broad border of 
the pygidia of the typical species. The low and smooth character 
of the glabella does indicate a proximity to that genus, however. 
The writer is indebted to Prof. Geo. H. Perkins, State Geologist 
of Vermont, for a recent opportunity of examining a good speci- 
men of this species, collected at Providence island, Vt. 
Bathyurus angelini, Billings. 
Plate VII, fig. 5. 
Bathyurus angelini , Billings, 1859. Canadian Naturalist and 
Geologist, Vol. IV, p. 467, figs. 37. — Raymond, 1905. Annals 
Carnegie Museum, Vol. Ill, p. 335, PI. 10, figs. 11, 12 (which see 
for further bibliography). 
The strata which furnished the types of Bathyurus angelini 
prove, upon re-examination, to underlie the sandstone ^ at the 
base of the Chazy, and a larger collection of fossils reveals a 
number of Beekmantown forms in the associated fauna, so that 
this species with its accompanying ostracods described from 
24S53—4J 
