148 
PALEONTOLOGY OF NEW YORK. 
two species, of which only the cephala are known, may belong to the same 
genus, but in the absence of conclusive evidence they are allowed to remain 
under the genus Cyphaspis, with which they agree in the characters of the 
head-shield. 
Cyphaspis craspedota, n. sp. 
PLATE XXIV. PIGS. 15-20. 
Compare Phillipsia coronata? Walcott. Monogr. U. S. Geol. Surv., vol. viii; Pal. Eureka Dist., p. 211. 
1884. 
General Form and Proportions. Outline regularly oval, interrupted only by 
the projection of the genal spines. 
Surface convex, conspicuously and sub-equally trilobate. Axis prominent, 
elevated; pleurae abruptly deflected on the lateral slopes. Length to width 
as 3 to 2. 
Cephalon. Outline nearly semicircular; length to width as 1 to 1.6. Border 
thickened, slightly reflexed, produced at the genal angles into spines which 
reach to the sixth thoracic segment. Doublure narrow, epistoma indistin¬ 
guishable. Marginal sulcus broad; frontal area convex near the glabella, 
lateral areas depressed-convex, and abruptly sloping. Occipital furrow and 
ring distinct, the latter thickened at the center. 
Facial Sutures normal. 
Glabella ovate or sub-pyriform, evenly convex, slightly flattened above; 
bounded on all sides by a strong sulcus, which is shallowest near the palpe¬ 
bral lobes. Basal nodes conspicuous, pyriform or sub-triangular. Baso- 
lateral furrows strong; antero-lateral impressions faint, and discernible only 
in casts of the lower surface. 
Cheeks depressed and sloping abruptly from the eye-lobe to the thickened 
border. 
Eyes conspicuously elevated, attaining the height of the glabella; base 
sub-pedicellate, slightly constricted. Visual surface sub-lunate, smooth, when 
strongly magnifled, showing numerous homo-corneal lenses. Palpebral lobe 
strong, not projecting, sloping abruptly to the palpebral sulcus. 
