CATALOGUE OF TRILOBITES. 333 



PELTURA. PHACOPS. 

 PELTURA Milne-Edw., 1840; Crust., vol. 3, p. 344. 

 holopyge. (See Bathynolus holopyge.) 



SCARABEOIDES (Wahl.) Matt., 1891; Trans. Royal Soc. Canada, vol. 9, 



p. 53, pi. 13, figs. 9 a-b. King Street and at Navy Island, St. 



John, also at Cape Breton. Taconic. 



PEMPHIGASPIS Hall, 1863; 16th Rep. New York State Mus. Nat. Hist., p. 221. 



- BULLATA Hall, 1863; 16th Rep. New York State Mus. Nat. Hist., p. 



221, pi. 5 a, tigs. 3-5. A species probably of the genus Micro- 

 discus. 



PHACOPS Emm., 1839; De Trilobites, etc., p. 18. The generic term Trim- 

 erocephalus McCoy has been used by authors for species like 

 Phacops volborthi, compact in form; glabella inflated and expanded 

 in front; lobes, except the basal ones, obscure; eyes small, and 

 occupying the front portions of the head; genal angles rounded; 

 pleura rounded; pygidium small, with few segments, and even 

 border. Acaste Goldfuss for such species as Phacops downingice 

 Murch. Diagnosis: Glabella not inflated nor greatly expanded 

 in front; furrows distinct; eyes well developed, with numerous 

 lenses; genal angles produced into spines; pleurae rounded or 

 truncate; pygidium small generally, with less than eleven seg- 

 ments; border even, but sometimes mucronate. 



Syn., PHACOPS (Monorakos) Schm., 1866. 



Calymene BUFO Green, 1832; Monthly Am. Jour. Geol., p. 559. 



Calymene BUFO Green, 1832; Mon. Tril. N. A., p. 41, cast 10. The 

 fossil is said to have been found in a dark grayish limestone in 

 the State of New Jersey. The cast approaches so near Phacops 

 latifrons Bronn that it may be the same species. 



- BUFO Hall, 1861; Des. New Species Foss., p. 65. 



- BUFO Hall, 1862; 15th Rep. New York State Cab. Nat. Hist., p. 93. 



BUFO Hall, 1876; Illus. Dev. Foss. Crust., pi. 8, figs. 24, 25. 



- BUFO Hall, 1888; Pal. New York, vol. 7, p. 26, pi. 8, figs. 25, 26. 

 bombifrons. (See Phacops cristata.) 



CACAPONA Hall, 1861; Des. New Species Foss., p. 68. Cacapon River 



near its junction with the Potomac, Va. Hamilton. 



Syn., Calymene bufo Cast., 1843; Syst. Sil. de I'Amer., p. 21, pi. 2, 

 figs. 1-4. 



- CACAPONA Hall, 1862; 15th Rep. New York State Cab. Nat. Hist., p. 96. 



CACAPONA Hall, 1876; Illus. Dev. Foss. Crust., pi. 8, figs. 18-23. 



- CACAPONA Hall, 1888; Pal. New York, vol. 7, p. 27, pi. 8, figs. 19-24. 

 callicephala. (See Dalmanites callicephala.) 



CRISTATA Hall, 1861; Des. New Species Foss., p. 67. 



Upper Helderberg. 



Syn., Phacops bombifrons Hall, 1861; Des. New Species Foss., p. 67. 

 Phacops cristata Hall, 1862; 15th Rep. New York State Cab. 

 Nat. Hist., p. 95. 



