332 SYSTEMATIC PALEONTOLOGY 



mentioned, but better material is necessary before the determination can 

 be made with certainty. 



Occurrence. BEEKMANTOWN LIMESTONE ( Stonehenge member). 

 Near Funkstown, Maryland. Cassin beds at Fort Cassin, Vermont. 



Collection. U. S. National Museum. 



: ARTHROPODA 



CLASS CRUSTACEA 

 subclass TRILOBITA 



Order HYPOPARIA 



Family HARPEDIDAE 



Genus EOHARPES Raymond 



EOHAEPES OTTAWAENSIS (Billings) 



Plate LI, Fig. 11 



Harpes ottawaensis Billings, 1865, Pal. Foss., vol. i, Geol. Surv. Canada, 



p. 182, text fig. 165. 

 Harpina ottawaensis Weller, 1903, Geol. Surv. New Jersey, Pal., vol. iii, 



p. 191, pi. xiv, figs. 1, 2. 

 Harpina ottawaensis Raymond, 1905, Annals Carnegie Mus., vol. iii, p. 331, 



pi. x, fig. 2. 

 Eoharpes ottawaensis Ruedemann, 1912, New York State Mus., Bull. No. 162, 



p. 116, pi. ix, fig. 1. 



Description. " Head strongly convex, with a wide, punctured border 

 which extends backward to about the thirteenth segment of the thorax. 

 If a line be drawn across touching the posterior edge of the neck seg- 

 ment, the contour in front of that line is nearly a perfect semicircle. 

 Glabella regularly conical, its length about five-ninths that of the head; 

 posterior furrows distinct, entering at about one-half the distance from 

 the ocular ridge to the posterior margin of the neck segment, thence 

 running obliquely inward and backwards at an angle of about 45, 

 apparently not quite one-third the width; two anterior furrows on each 

 side, represented by obscure pits; neck furrow narrow; neck segment 

 convex, strongly elevated on the fixed cheeks. The eyes (ocelli) are 



