42 
PALEONTOLOGY OF NEW YORK. 
single type specimen, but Kayser has provisionally referred to this species a 
pygidium from the Lower Devonian at Daim in the Ilhine-land. 
Distribution. Hamilton group. Hydraulic limestone, Falls of the Ohio. 
Dalmanites (Cryph^us) Boothi. 
PLATE XVI, FIGS. 1-4 ; AND PLATE XVI A, FIGS. 3-S. 
Cry2)7/ceus Boothii, Green. Amer. Jouvn. Science, vol. xxxii, j>. 843, fig-ure. 1837. 
CryphcBus Grreenii, Conrad. Second Ann. Kept. Palseont. Dept. N. Y. State Geol. Surv., j). 66. 1839. 
Cryphceus aalliteles, Conrad. Second Ann. Kept. Paleeont. Dept. N. Y. State Geol. Surv., ji. 62. 1862. 
Asaphus HalUi, Conrad. Third Ann. Kept. PaljEont. Dept. N. Y. State Geol. Surv., p. 204. 1840. 
Cryphmus callUeles, Hall. Geology of N. Y., Pt. IV, p. 201. 1843. 
[?] CryplKBXiS callUeles, De Vbrneuil. Bull. Soc. Geol. de France, 2nd Ser., vol. vii, p. 164, pi. i, fig. 3. 1850. 
Phacops pectinatus, F. A. Rcembr. Beitr. I, zur Kenntn. d. Harzgeb., p. 62, pi. ix, fig. 27. 1850. 
Palmania callUeles, Emmons. Manual of Geology, p. 138, f. 124 (7). 1860. 
Dalmania Boothii, Hall. Descr. New Species of Fossils, etc., p. 63. 1861. 
Bahnania Boothii, Hall. Fifteenth Kept. N. Y. State Cab. Nat. Hist., p. 91. 1862. 
BahiLanites Boothii, Hall. Illustrations of Devonian Fossils, pi. xvi, figs. 1-6, 9-11, 13, 15, 16. 1876. 
Cryphwus stelUfer, Kayser (partiin). Abhandl. z. Geolog. Specialkarte von Pr. und d. Thiir. St., vol. ii, pt. 
4, p. 33. 1878. 
CryphcBus laciniatus, Kayser (partim). Abhandl. z. Geolog. Specialkarte von Pr. und d. Thiir. St., vol. ii, 
pt. 4, p. 34. 1878. 
General Form and Proportions. Body sub-ovate, laterally and posteriorly 
fimbriate; length about one-half greater than the width. Surface depressed- 
convex, distinctly trilobate. Axis prominent, elevated; pleurm flattened. 
Cephalon relatively large; outline semi-elliptical, faintly produced on the 
frontal margin; length to width as 1 to 2. Frontal area narrow, lateral area 
broader but mostly occupied by the strong eye-lobes Margin thickened by 
a broad doublure, which widens under the frontal limbus to form the epistoma, 
and is produced at the genal angles into spines which normally reach to the 
sixth thoracic segment, and are equal in length to the axial length of the 
glabella. These spines are broad, thin and blunt, and lie nearly in a ver¬ 
tical plane. 
The Facial Sutures take their origin on the lateral margins at points about 
half-way between the frontal extremity and the apices of the cheek-spines, 
pass inward and downward to the lower margin of the ocular lobe, thence 
over the eye to the anterior edge of the frontal lobe of the glabella, meeting 
near the anterior extremity just within the margin. 
