PALEOZOIC. 



HYDROZOA. 



CAMBRIAN AND SILURIAN. 



CAMBRIAN. LOWER SIL. 



TPPER BILFRIAN. 



SPECIES. 



Graptolithus (continued). 

 — tenuis Portl.. 



taenia Sow. 



turriculatus ... Barr. 



— vomerinus Nich 



Oraptopora Hall, 1857. 



— socialis Salt 



NBMAGBArTID.fi. 



Helicograptus ... Nicholson, 1868 



Catnograptus . . . Hall, 1 868 . . . 



— gracilis Hall 



DlCHOGBAPTLDiB. 



Loganograptus ... Hall, 1868 ? 



— Logani Hall 



Murchisonites Gbppert, 1859 . 



NEMAGRAPTID.E. 



Nemagraptus Emmons, 1855 



— capillaris Emm 



Oldhamia Forbes, if 



— antiqna Forbes .. 



Var. discreta ... Kin. .. 

 radiata Forbes 



NEMAGBAPT1D.E. 



Plourograptufl ... Nicholson, 1867 

 — linearis Carr 



$z 



12 



S 



REFERENCES. 



Geol. Rept. p. 319, 1. 19, f. 7; ? ib. M'Coy, Brit. Pal. Fobs. 

 p. 6, 1. 1 B, f . 4, 5 ; ib. Salt. Q. J. Geol. Soc. vol. vii, p. 1 73, 

 1. 10, f . 1 ; ib. vol. v, p. 13, 1. 1, f. 9. Monograp. Salteri, 

 Geinitz, Verst. Grauw. die Grapto. p. 36. G. tenuis, Salt. 

 Siluria, 4ed. p. 51, Foss. 11, f. 12; ib. Nich. Q. J. Geol. 

 Soc. vol. xxiv, p. 538, t. 20, f. 31 ; ib. Hall, Pal. New 

 York, vol. i, p. 272, t. 74, f. 2. 



Vide G. Hisingeri. 



Grapto. de Boheme, p. 56, t. 4, f . 7, 1 1 j ib. Nich. Q. J. Geol. 

 Soc. vol. xxiv, p. 542, t. 20, f . 29, 30. 



Mono. Brit. Grapto. pt. 1, 1872, p. 53, woodcuts A, B, C. 

 Vide Dictyonema. 



Pal. New York, vol. i, p. 274, t. 74, f. 9; ib. Baily, Q. J. 

 Roy. Geol. Soc. Dub. 1861, t. 4, f. 5 ; ib. Mem. Geol. Surv. 

 Ireland, Sheet 133, p. 12, f. 3. 



Grapto. Quebec Group, p. 100, t. 9 ; ib. Hall, Pal. New York, 

 vol. iii. Dichograp. Salt. Q. J. Geol. Soc. vol. xix, p. 138, 

 woodcut, p. 137, f. 11. Dichograp. Nich. Q. J. Geol. Soc. 

 vol. xxiv, p. 128. 



Vide Oldhamia. (Antiqua.) 



Am. Geol. vol. i, p. 109, 1. 1, f. 7; ib. Hopk. and Lapw. 

 Grapto. of Arenig and Lland. Rocks, St. David's, Q. J. Geol. 

 Soc. vol. xxxi, p. 653, t. 34, f. 2. ? Cladograptus capil- 

 laris, Carr. Geol. Mag. vol. v, p. 130, t. 5, f. 7. 



Jour. Geol. Soc. Dublin, vol. iv, p. 20. 



Kinahan, Trans. Royal Irish Acad. vol. xxiii, p. 557, f. 5; 

 Salt. Mem. Geol. Surv. vol. iii (Geol. N. Wales'), p. 282, 

 t. 26, f. 1-3. Murchisonites Forbesi (Oldhamia), G6pp. 

 Ueber Foss. Flora Sil. Dev. Unter-Kohl. p. 441, t. 35, f . 1, 

 in Acta Acad. Cses. Leop. Carol. Naturae Curio. Novo Acti, 

 vol. xxvii, i860; Oldhamia, Baily, Fig. Char. Brit. Foss. 

 vol. i, p. x-xii, Expl. plate, p. 1, 1. 1, f. 1 a-f. Oldhamia 

 antiqua, Baily, Geol. Mag. vol. ii, p. 385, 397, woodcuts, 

 P- 39 ' -4. '• 3.4- 



Trans. Roy. Irish Acad. vol. xxiii, p. 556 : var. of O. antiqua. 



Kinahan, Trans. Roy. Irish Acad. vol. xxiii, p. 557, f. 3-5, 

 8-10 ; ib. Salt. Mem. Geol. Surv. vol. iii (Geol. N. Wales), 

 p. 281, t. 26, f. 4, 5, and vars. No. 6, J; ib. Baily, Geol. 

 Mag. vol.ii, p. 385-397, woodcut, p. 395, (2 vars.) Oldhamia, 

 Gopp. Ueber Foss. Flora Sil. der Dev. und Unter-Kohlen, 

 P' 437> *• 34> f - *> 2 » in Acta Acad. Cass. Leop. Carol. &c. 

 vol. xxvii, i860. 0. radiata, Baily, Fig. Char. Brit. Foss. 

 vol. i, p. 2, 1. 1, f. 2. 



Cladograptus, Ann. Mag. Nat. Hist. vol. iii. Dendrograptus, 

 Geol. Mag. vol. iv, p. 70. Pleurograptus linearis, Nich. 

 Geol. Mag. vol. iv, p. 258, 1. 11, f. 1-4. Cladograptus, 

 Siluria, 4 cd. p. 541, Foss. 90, f . 8, Carruthers, Trans. Roy. 

 Phys. Soc. Edinb. 1858, p. 467, f. 1. 



