180 
PALEONTOLOGY OF NEW YORK. 
Echinocaris multinodosa. 
PLATJC AXIX, FIGS. IS, 19. 
Uchinocaris multinodosa, y^niTFiKLU. New Forms of Fossil Crustacea, etc. Ainer. Jour. Science, Third 
Series, vol. xix. No. 109, p. 38, pi. (unpublished), fig-. 8. 1880. 
Echinocaris multinodosus, Packard. The Palaeozoic Allies of Nebalia. Ainei-. Naturalist, p. 952, fig. 
10, Dec. 1882. 
Echinocaris nmltinodosus, Packard. Monog. N. Amer. Phyllopod Crust. Twelfth Ann. Rep. U. S. Geol. 
Surv., p. 451, tig. 71a. 1883. 
Echinocaris imdtinodosa, Beecher. Ceraliocaridae fi-om the Chemung and Wavei-ly groups, etc. Second 
Geol. Surv. Penna., vol. PPP, ji. 5. 1884. 
EcMnxtcaris nmltinodosa, Etheridge, Woodward and Jones. Third Kept. Com. on Fossil Phyllopoda of the 
Palaeozoic Rocks, p. 35. 1885. 
Cephalothorax. Ill the two specimens of this species which have been 
observed the carapace has been somewhat compressed vertically, so that the 
outline of the valves can not be accurately determined. It was probably 
much like that in Echinocaris pustulosa, transversely sub-ovate, widest an 
teriorly. The margins are thick and strongly elevated. Hinge-line short, 
being one-half the length of the carapace. • On the anterior extremity the 
margin bends strongly forward from the hinge, rounding to a broad curve 
upon the ventral border; from the posterior extremity to the hinge the mar¬ 
gin is straight. 
Nuchal furrow distinct, taking its origin just behind the second of the four 
nodes upon the hinge-line and passing obliquely forward, becoming obsolete 
at or near the anterior margin. 
Cephalic region obliquely elliptical on each valve, the anterior portion occu¬ 
pied by a large, irregularly (juadrate node, whose highest point is near the 
hinge. This is separated, by a deej) furrow on its posterior margin, from a 
small but conspicuous node lying close upon the hinge. The optic spot can 
not be satisfactorily located. 
Thoracic region characterized by a strong, obliquely elongate node 
situated upon the hinge-line and most elevated at its proximal extremity; 
terminating in a conspicuous depression which merges into the nuchal 
furrow. The node is sub-triangular in outline and has its apex directed 
ventrally. Below the apex of this node arises another, broad at its upper 
