PALAEOZOIC. 



HYDEOZOA. 



CAMBBIAN AND SILURIAN. 



CAMBRIAN. LOWEB S1L. UPrER SILUEIAN. 



SPECIES. 



Pterograptus Holm. 1S81 ... 



— acutus HopTc 



MONOGEAPTID^;. 



Rastrites Barrande, 1850 



— distans Lapw 



— fugax Barr 



— hybridus Lapw 



Lasiogbaptid^; 



(GlOSSOGBAPTIDJE). 



Betiograptus Hall, 1865.. 



Suess. 1 85 1 



— tentaculatus ... Hull 



Rbtioxitid^:. 



Betiolites Barrande, 1 850 



Gladiograptus Hop. St Lapw. 



— fibratus Lapw 



— obesus Lapw 



— var. Daironi ... Lapw 



DICHOGBAPTID.B, 

 Schizograptus ... Nicholson, 1876 



— reticulatus Nich 



DlCHOGBAPTlD.*:. 

 Temnograptus ... Nicholson, 1876 



— multiplex Nich 



— Nicholsoni Lapw 



DlCHOGBAPTID-E. 

 Tetragraptus Salter, 1863 



— approximates ... Nich 



Bigsbyi Hall 



denticulatus 



Hall 



fruticosus Hall 



Thamjtogbaptipje. 

 Thamnograptua... Hall, 1859 



— Barrandii Hall 



— Scoticus Lapw 



— typut Hall 



DlCHOGBAPTlD*. 

 Trichograptus . . . Nich olson, 1 8 76 

 — fragilis t Nich 



REFERENCES. 



Vide Ptilograptus, Hall, p. 13, loc. cit. 



Geol. Mag. Dec. II, vol. iii, p. 313, f. 2. 



Grapto. de Boheme, p. 66, t. 4, f. 1. 



Geol, Mag. Dec. II, vol. iii, p. 313, t. 10, f. 5. Var. of 

 Rast. peregrinus. 



Graptolithus, Geol. Survey Canada, Rept. for 1857, p. 134. 

 Retiograptus, ib. Canadian Org. Remains, Dec. II, 1865, 

 p. 116, t. xiv, f. 6-8; ib. Lapw. Ann. Mag. Nat. Hist. 

 5 ser. vol. vi, p. 22, 188. 



Belfast Nat. Field Club (Grapto. Co. Down), p. 136, t. 6, f. 28. 



Rept. Brit. Assoc. 1 871, p. 104 (Gala Group) ; ib. Belfast Nat. 

 Field Club (Grapto. Co. Down), p. 137, t.6, f. 29, 1876-7. 



Belfast Nat. Field Club (Grapto. Co. Down), p. 137, t. 6, 

 f.30. 



Bichograptus, Q. J. Geol. Soc. vol. xxiv, p. 143, t. 5, 

 f. 3-5- 



? Dichograptus, Q.J. Geol. Soc. vol. xxiv, p. 129, t.6, f. 1-3. 

 ? Didymograptus, p. 8, loc. cit. 



Fide Herrmann, Geol. Mag. Dec. Ill, vol. iii, p. 19 (wood- 

 cuts, p. 17, f. 5). 



Graptolithus, Geol. Surv. Canada, Org. Remains, Dec. II, 

 p. 86, t. 1 6, f. 22-30. ? Phyllograptus similis, Hall. 

 ? Tetragraptus, Bigsbyi Linnars. Lapw. 



Graptolithus, Geol. Surv. Canada, Rept. Progress, 1857, 

 p. 132; ib. Quebec Group, p. 88, t. 4, f. 12-16. 



Graptolithus, Geol. Surv. Canada, Rept. Progress, .,1857, 

 p. 128; ib. Geol. Surv. of Canada (Grap. Quebec Group), 

 p. 90, t. 5, f . 6-8, t. 6, f. 1-3. 



Cat. West. Scott. Foss. p. 7, t. 6, f. 95. 

 Cat. West. Scott. Foss. p. 7, t. 6, f . 94. 

 Vide Phyllograptus. 



Vide Dichograptus, loc. cit. p. 6. 



397 



