-n- PALEONTOLOGY OF NEW YORK. 



DlPTEROCARIS PES-CERVjE. 



PLATE XXXV, FIGS. 20,21. 



.< Ilabkb. Aiihi'. .lour. Science, Third Scries, vol. xxv, p. 123, figs. 4 and 5. 1SS3. 

 . Jones and Woodward Geol. Mag-., Dec. iii, vol i, No. S, p. 349. 18S4. 



Dipt Ethbi IB, Woodward and Jones. Second Rept. Committee on Fossil Phyllopoda 



of the Palaeozoic Rocks, p. 11. 1884. 

 MB, Etheridge, Woodward and Jones. Third Rept. Committee on Fossil Phyllopoda 

 of the Paheozoic Rocks, p. 3. 1885. 



Carapace small, elongate-lanceolate in outline ; isthmus slightly anterior and 

 one-fourth as long as the shield. Cephalic cleft short, margins rapidly 

 diverging, and making obtuse and rounded angles on the periphery. 

 Abdominal cleft long and narrow, its margins making sharp angles at the 

 posterior extremity. 



The surface is ornamented as in the preceding species. 



Dimensions of the type specimen, length 11 mm., width 6 mm. 



Distribution. Chemung group. In the lower shales of the group at Dansville, 

 Livingston county. 



