BIBLIOGRAPHIC LIST OF GENEEA AND SPECIES. 7 



Acrothele pretiosa — Coutinued. 



Canadian: C'haudicre River at Grand Trunk Rail Road Bridge, Cape Rouge aljove 



Quebe'-, Canada (Sillery); near Grenville, Washington County, New York; 



Point Levis, Quebec (Levis, Didymograptus zone). 

 Plesiotype.—Csit. No. 52004 U.S.N.M. 



Acrothele rotunda (Nicholson). 



Dawsonia rotunda Nicholson, Ann. Mag. Nat. HLst., 4t}i ser., 11, 187S, p. 141, 



fig. 3a, b. 

 Canadian (Levis, Diplograptus dentatus zone): Point Levis, Quebec. 



ACROTRETA Kutorga. Genotype: A. subconica Kutorga. 



Acrotreta Kutorga, Verhandl. Russ.-kais Min. Gesell. St. Petersburg for 1847, 

 No. 12, 1848, pp. 259, 260.— Morris, Ann. Mag. Nat. Hist., 2d ser., 4, 1849, 

 pp. 316, 318.— Davidson, Brit. Fossil Brach., 1, Introduction, No. 3, 1853, 

 p. 133.— Von Seebach, Zeits. d. d., geol. Gesell., 17, Hft. 2, 1865, p. 341.— 

 Davidson, British Foss Brach., 3, pt. 7, No. 4, 1871, p. 343.— Dall, Bull. 

 U. S. Nat. Mus., 8, 1877, p. 12.— Zittel, Handb. Pal., 1, Abth. 1, 1880, p. 666.— 

 Walcott, Mon. U. S. Geol. Surv., 8, 1884, pp. 16-17.— (Ehlert, Man. Conch., 

 1887, p. 1266.— Hall and Clarke, 11th Ann. Rep. State Geol. New York, 

 1892, p. 250.— 45th Ann. Rep. New York State Mus., 1892, p. 566; Pal. 

 New York, 8, pt. 1, 1892, pp. 101-104.— Schuchert, Zittel-Eastman, Textb. 

 Pal., 1, 1900, p. 308.— Matthew, Bull. Nat. Hist. Soc. New Brunswick, 4, 

 pt. 5, 1902, p. 399; Geol. Surv. Canada, Rep. Cambrian Rocks Cape Breton, 

 1903, p. 94-97.— Grabau and Shimer, N. A. Index Foss., 1, 1907, p. 199.— 

 Walcott, Smithsonian Misc. Coll., 53, 1908, pp. 142, 140; Mon. U. S. Geol. 

 Surv., 51, 1912, p. 671. 



Linnarssonia Walcott, Amer. Jour. Sci., 3d ser., 29, 1885, p. 115. — Matthew, Trans. 

 Royal Soc. Canada, 1st ser., 3, sec. 4, 1886, p. 35. — Dawson, Trans. Royal 

 Soc. Canada, 1st ser., 7, sec. 4, 1890, pp. 53-54. — Hall and Clarke, 11th Ann. 

 Rep. State Geol. New York, 1892, p. 251; 45th Ann. Rep. New York State 

 Mus., 1892, p. 567; Pal. New York, 8, pt. 1, 1892, pp. 107-109.— Matthew, 

 Trans. Royal Soc. Canada, 1st ser., 9, sec. 4, 1892, p. 42. 



Acrotreta attenuata Meek (part). See Acrotreta idahoensis. 



Acrotreta baileyi Matthew. See Acrotreta bisecta. 



Acrotreta belti (Davidson?) (Matthew). 



?Obolella belti Davidson, Geol. Mag., 5, 1868, p. 310, pi. 15, figs. 25-27. 

 Linnarssonia belti? Matthew, Trans. Royal Soc. Canada, 1st ser, 9, .«ec. 4, 1892, 



pp. 42, 43, pi. 12, figs. 7a-c; Geol. Surv. Canada, Rep. Cambrian rocks Cape 



Breton, 1903, p. 209, pi. 16, fig. 3a-c. 

 Lower Tremadoc shales: North Wales. 

 Canadian (Bretonian — Div. C. 3 c): St. John, New Brunswick. 



Acrotreta bisecta Matthew. 



Acrotreta baileyi Matthew, Trans. Royal Soc. Canada, 1st ser., 9, sec. 4, 1892, 



p. 43, pi. 12, fig. 7d. 

 Acrotreta bisecta Matthew, Bull. Nat. Hi.st. Soc. New Brunswick, 4, pt. 4, 1901, 



pp. 275-276, pi. 5, figs. 5a-g; ibid., pt. 5, 1902, p. 394, pi. 16, figs. 2a-g.— 



Walcott, Proc. U. S. Nat. Mus., 25, 1902, p. 582.— Matthew, Geol. Surv. 



Canada, Rep. Cambrian Rocks Cape Breton, 1903, pp. 186-187, pi. 11, figs. 



5a-g.— Walcott, Proc. U. S. Nat. Mus., 28, 1905, pp. 298-299; Mon. U. S. Geol. 



Surv., 51, 1912, p. 678, pi. 66, figs. 7, 7a-e. 



