3() North American Palseozoic Crustacea. 



interrupta, Beecher, 1884 ; 2d Geol, Survey Pennsylvania, vol. PPP, 



p. 18, pi. 2, fig. 6. Chemung. 



inlernii)ta, Ktlicridge, Woodward & Jones, 1885; 3d Rept. Comm. Fossil 



Pliyllopoda Pal. Hocks, p. 3.5. 

 interrupta. Hall & Clarke, 1888; Pal. New York, vol. 7, p. 185, pi. 31, 



fig. 13. 

 Turrilepas, Woodward, 18(j5 ; Quart. .Tour. Geol. Soc. London, vol. 21, p. 489. 

 ] hiiijiKisis. — Elongate cone-shaped hodies, composed of from 4 to 6 vertical 



ranges of scale-like plates, which are subtriangular in general outline, 



and are covered with strong, somewliat elevated concentric lines. The 



plates of the middle range are distinguished from those of the lateral 



range by tiieir more convex surface and median carina, 

 cancellatus. Hall & Clarke, 1888; Pal. New York, vol. 7, p. 216, pi. 36, 



fig. 2. Corniferous. 



Devonicus, Hall & Clarke, 1888; Pal. New York, vol. 7, p. 21G, pi. 36, 



fig. 3. Hamilton, 



flexuosus. Hall & Clarke, 1888 ; Pal. New York, vol. 7, p. 215, pi. 36, 



fig. 1. Corniferous. 



foliatus, Hall & Clarke, 1888 ; Pal. New York, vol. 7, p. 218, pi. 36, fig. 15. 



Hamilton. 

 ?Newberryi, Hall & Clarke, 1888; Pal. New York, vol. 7, p. 219, pi. 36, 



figs. 16-19. Hamilton, 



nitidulus, Hall & Clarke, 1888 ; Pal. New York, vol. 7, p. 218, pi. 36, fig. 4. 



Hamilton, 

 squama, Hall & Clarke, 1888 ; Pal. New York, vol. 7, p. 217, pi. 36, 



figs. .5-8. Hamilton, 



tener. Hall & Clarke, 1888; Pal. New York, vol. 7, p. 219, pi. 36, 



figs. 9-14. Hamilton. 



