1268 BULLETIN 92, UNITED STATES NATIONAL MUSEUM. 



Tetragraptus denticulatus — Continued. 



Tetragrapsus denticulatus Gurley, Jour. Geol., 4, 1896, p. 101 (gen. ref.). 

 Canadian (Levis, Didymograptus zone): Point Levis, Quebec; Newfoundland 

 (Quebec— P). 



Tetragraptus fruticosus (Hall). 



Graptolithus fruticosus Hall, Geol. Surv. Canada, Rep. for 1857, 1857, p. 128; 

 Canadian Nat. Geol., 3, 1858, p. 162.— Billings, Geol. Surv. Canada, Pal. 

 Foss., 1, 1865, pp. 366, 375.— Hall, Canadian Org. Rem., dec. 2, 1865, p. 90, 

 pi. 5, figs. 6-8; pi. 6, figs. 1-3; 20th Ann. Rep. New York State Cab. Nat. Hist., 



1867, pi. 3, fig. 15; rev. ed., p. 260, pi. 3, fig. 15, pi. 4, fig. 10, p. 223. 

 Didymograptus? fruticosus Etheridge, jr., Ann. Mag. Nat. Hist., 4th ser., 14, 1874, 



6, pi. 3, fig. 19. 



Graptolites (Didymograpsus) fruticosus McCoy, Jour. Geol. Surv. Victoria, 

 Prodr. Pal. Victoria, dec. 1, 1874, p. 13, pi. 1, figs. 9-14. 



Tetragraptus (Bryograptus) fruticosus Brogger, Die sil. Etagen 2 and 3, etc., 1882, 

 p. 39, Kristiania. 



Tetragraptus fruticosus Lap worth, Ann. and Mag. Nat. Hist., ser. 5, 6, 1880, p. 

 20.— Tullberg, Sver. Geol. Und. Afh. och upps. ser. C, no. 50, 1882, p. 22 — 

 Lapworth, Roy. Soc. Canada, Proc. and Trans., 1886, p. 168. — Roemer and 

 Freeh, Leth. Pal., 1, 1897, p. 602.— Ruedemann, Bull. New York State Mus., 

 52, 1902, pp. 554, 556, 566; p. 588, fig. 15.— Elles and Wood, Mon. British 

 Grapt., pt. 1, Pal. Soc, 1902, p. 61, pi. 6, figs. 2a, b. — Ruedemann, Mem. New 

 York State Mus., 7, pt. 1, 1904, pp. 649-652, pi. 9, figs. 11-14; pi. 10, figs. 1-10. 



Tetragrapsus fruticosus Ami, Geol. Surv. Canada, Rep., 2d ser., 3, pt. 2, 1889, p. 

 116k. 



Canadian: Island of Orleans and Point Levis, Quebec (Levis, Didymograptus 

 zone); Deepkill, Rennsselaer County, New York (Deepkill, Tetragraptus 

 zone); Arkansas; Newfoundland; Great Britain; Scania; Australia. 



Tetragraptus fruticosus (part) Ruedemann. See Tetragraptus clarkei. 



Tetragraptus headi (Hall). 



Graptolithus Headi Hall, Canadian Nat. Geol., 3, 1858, p. 161; Geol. Surv. Canada, 



Rep. Progr. for 1857, 1858, p. 127.— Billings, Geol. Canada, Geol. Surv. 



Canada, 1863, p. 228, fig. 236.— Hall, Geol. Surv. Canada, dec. 2, 1865, p. 8, 



fig. 3; p. 94, pi. 6, fig. 8 (?pl. 5, figs. 11, 12). 

 Graptolithus (Loganograptus) headi Hall, 20th Rep. New York State Cab. Hist., 



1868, p. 174, fig. 4; p. 226; rev. ed., 1870, p. 207, fig. 4. 



Tetragraptus Headi Nicholson, Quart. Jour. Geol. Soc. London, 64, 1868, p. 131. — 

 Roemer and Freeh, Leth. geog., 1 Theil, Leth. Pal., 1, 3 Lief, 1897, p. 602, 

 fig. 167.— Elles, Quart. Jour. Geol. Soc. London, 54, 1898, p. 486, fig. 11.— 

 Elles and Wood, Mon. British Grapt. Pal. Soc, 1902, p. 59, fig. 35a, b; pi. 5, 

 figs. 3a, b. 



Tetragrapsus Headi Nicholson, Mon. British Grapt., 1872, p. 66, fig. 36. 



Tetragraptus cf. Headi Hoek, Neues Jahrb. Min. Geol. Pal., 34, 1912, p. 226, 

 pi. 12, fig. 6. 



Canadian (Levis, Diplograptus dentatus zone): Point Levis, Quebec; Newfound- 

 land; Skiddaw slate of Great Britain; Bolivia. 



Tetragraptus (Etagraptus) lentus Ruedemann. 



Tetragraptus (Etagraptus) lentus Ruedemann, Mem. New York State Mus., 7, 



pt. 1, 1904, p. 666, pi. 9, figs. 7-10. 

 Canadian (Deepkill, Didymograptus bifidus zone): Deepkill, Rensselaer County, 



New York. 



