North American Palaeozoic Crustacea. 29 



Nothozoe, Barrande, 1872 ; Syst. Sil. Boheme, vol. 1, Suppl., p. 536. Type 

 Nothozoe pollens, Barrande. 

 Vermontana, Whitfield, 1884 ; Bull. Am. Mus. Nat. Hist., vol. 1, p. 144, 

 pi. 14, figs. 14, 15. Potsdam, 



Palaeocaris, Meek & Worthen, 1865; Proc. Acad. Nat. Sci. Phila., vol. 17, 

 p. 48. 

 Gen. Char. — " Inner and outer pair of antennje of nearly equal length, 

 the former each bearing a well-developed accessory appendage ; pedun- 

 cles of both pair shorter than the flagella. Head about as long as the 

 first two abdominal segments. Thoracic legs long and slender ; ante- 

 rior pair not chelate. Telson long, tapering, and horizontally flattened ; 

 stylets with first joint very small, second double, and also flattened 

 horizontally." (Meek & Worthen, Geol. Illinois, vol. 2, p. 403.) 

 Acanthotelson inceqwdis, Meek & Worthen, 1865 ; Proc. Acad. Nat. Sci. 

 Phila., vol. 17, p. 48. Coal Measures. 



Acanthotelson incequalis, Meek & Worthen, 1866 ; Geol. Illinois, vol. 2, 

 p. 403, pi. 32, figs. 7, 7 a. Referred to Palceocaris typus. 

 Palaeocaris typus, Meek & Worthen, 1865 ; Proc. Acad. Nat. Sci. Phila., vol. 17, 

 p. 49. 

 incequalis, Meek & Worthen, 1866 ; Geol. Illinois, vol. 2, p. 403, pi. 32, 



figs. 7, 7a. Palaeocaris typus, p. 405, pi. 32, figs. 5 a, b, c, d. 

 typus. Meek & Worthen, 1868 ; Geol. Illinois, vol. 3, p. 552, figs, a, b. 

 typus, Peach, 1880 ; Trans. Royal Soc. Edinburgh, vol. 30, p. 85, pi. 10, 



figs. 10 g, 10 h. 

 typus, Brocchi, 1880 ; Bull. Soc. Geol. France, vol. 8, p. 9, pi. 1, figs. 8-10. 

 typus, Woodward, 1881 ; Geol. Mag., Dec. 2, vol. 8, p. 533, woodcut, 

 typus, White, 1884; 13th Ann. Rept. Dept. Geol. Nat. Hist. Indiana, 



p. 179, pi. 38, figs. 1, 2, 3. 

 typus, Packard, 1885, Am. Naturalist, vol. 19, p. 790. 

 typus, Packard, 1886 ; Mem. Natl. Acad. Sci., vol. 3, p. 129, pi. 3, figs. 1-4 ; 

 pi. 7, figs. 1,2. 

 Pulceocrangon, Salter, 1861 ; see Crangopsis, Salter, 1863. 



Palaeopaleemon, Whitfield, 1880 ; Am. Jour. Sci., 3d series, vol. 19, p. 40. 

 Diagnosis. — " Cephalothorax not rostrate ? Keeled upon the dorsum and 

 sides. Antennules not observed. Antennse with very strong basal 

 joints, exceeding in strength any of the thoracic appendages. Eye 

 peduncles probably short. Thoracic ambulatory appendages slender, 

 not forcipate. Abdomen composed of 6 segments. Telson short, rapidly 

 tapering, and connected by a membranous expansion with the lateral 

 caudal spines. In the midst of this caudal expansion lies a pair of thin 

 lamellar spines articulated at their proximal extremities to both telson 

 and lateral spines." (Hall & Clarke, Pal. New York, vol. 7, p. Ixi.) 

 Newberryi, Whitfield, 1880; Am. Jour. Sci., 3d series, vol. 19, p. 41. 



Erie Shales. 

 (Plate, figs. 1, 2, 3. Plate and explanation only with author's edition.) 

 Newberryi, Hall & Clarke, 1888 ; Pal. New York, vol. 7, p. 203, pi. 30, 

 figs. 20-23. 



