98 
BULLETIN OF THE LABORATORIES 
which is abruptly recurved at the margin and marked on each side by 
a mammilliform tubercle.” Only the largest Ohio specimen shows 
signs of the tubercles, and the margin of none of the specimens is re- 
curved. It is hoped that with these comparisons the character and ex- 
tent of this species may cause no trouble. 
Named after Lieutenant A. W. Vogdes, who has aided so much 
in the elucidation of this species. 
Locality aiid position. Allen’s Quarry, Soldiers’ Home Quarries, 
Ohio ; Catoosa Station, Hematitic bed at Dug Gap, Georgia ; Clinton 
Group. 
Genus CERAURUS, Green, 
VITI. Ceraurus . 
{Plate VIII, Fig. 17.) 
This species, known only by a single glabella, is distinct from any 
known to me in the same series of rocks. However, it is not deemed 
wise to give it a specific name, since that might only lead to unneces- 
sary synonomy. 
Glabella oval, convex, the posterior border inclined to be straight, 
with three pairs of furrows; the posterior pair are situated about a 
third of the length of the glabella from the posterior margin of the 
same, they curve gradually inwards and backwards, causing the glabel- 
la to appear lobate. A little in front of the middle of the glabella is 
the second pair of furrows, which are shorter. In front of these are 
the anterior furrows, not so decidedly curved backwards. All these 
furrows appear to consist of two narrow furrows running very close 
together in a narrow groove. The little trace of the occipital groove 
remaining indicates that the occipital ring was strongly depressed to- 
wards either side. 
Locality and position. Brown’s Quarry, Clinton Group. 
Genus LICHAS, Dalman. 
IX. Lichas breviceps, LLall. 
{Plate VIH, Fig. 18, 19.) 
Since the publication of the first paper, numerous specimens have 
been found at John Brown’s Quarry. The structure of the head is now 
