CRUSTACEA. 
55 
CORYCEPHALUS, n. s.-g. 
Dalmanites (Corycephalus) regalis. 
PLATE XI, FIGS. 1-4. 
Dalmanites regalis, Hall. Illustrations of Devonian Fossils, pi. xi. 1876. 
Cephalon large, outline lunate or semi-ovate; length (axial) to width as 1 to 2. 
Border narrow and vertical in front, becoming broader on the sides, and 
produced at the genal angles into long incurving spines, which equal in 
length the axial length of the shield. The margin is ornamented by a 
series of quadrate denticulate processes, which are short in front of the 
glabella, but become broader and longer on the sides. These processes 
are somewhat constricted toward their bases, hollow and sub-cylindrical in 
front, flattened at the sides. On the anterior margin they slope outward 
with about the same inclination as the frontal area, but at tlie sides they 
stand almost at right angles with the nearly vertical genal area. Nineteen 
of these processes are visible upon one-half of the most perfect example, a 
portion of those on the other half being broken away; this would make 
thirty-eight around the entire margin of the head. 
Facial Sutures apparently normal, lying in deep sulci in their course over 
the cheeks. 
Glabella sub-hexagonal; surface convex in front, depressed behind; widest 
across the tips of the first pair of lobes; length and width about equal. 
Anterior lobe large, sub-pentagonal, transverse on the anterior margin; lateral 
margins short and nearly parallel to the axis; postero-lateral margins rapidly 
approximating. Surface convex, sloping almost vertically to the anterior 
margin, more gently to the sides, and is nearly horizontal posteriorly. The 
first lateral furrows are broad and shallow, inclined backward; the first 
lateral lobes are elevated and nearly transverse; the second lateral fur¬ 
rows are distinctly impressed at their inner extremities, becoming obsoles¬ 
cent outward, giving the first and second lobes the appearance of coalescing 
for the outer one-third of their length ; third lateral furrows narrow and 
