PALEOZOIC. 



HYDROZOA. 



CAMBRIAN AND SILURIAN. 



CAMBRIAN. LOWBB 8IL. 



UFPKB SILTJBIAN. 



SPECIES. 



I 



Didymogrraptus (continued). 

 — Nicholsoni Lapw 



— nitidus Hall 



— patulus Hall 



— pennatulus Hall 



— terratulus Nich 



— sextans Hall 



— sparsus Hopk 



— V*. fractal Salt 



Diplogbaptid.b. 



Diplograptus M'Coy, 1850. 



Prionotua HUinger, 1837 . 



Diprion Barrande 



Palaolithus ... Siiess, 1851 ... 



— acnminatai Nich 



— angnstifolius ... Hall 



— antennarius Hall 



barbatnlus Salt. ... 



bimucronatus . . . Nich. . . . 



I, a 1 1 1, his Salt. ... 



armatns Nich. ... 



 cometa Geinitz 



confertus Nich. .. 



den tat us Brong. 



— Etheridgii Hopk... 



— fimbriatus Hopk... 



— foliaceut Murch. 



— 



REFERENCES. 



Q. J. Geol. Soc. vol. xxxi, p. 644, t. 33, f. 5. D. serratulus, 

 Nich. Ann. Mag. Nat. Hist. 4 ser. vol. v, p. 343, t. 7, f . 3, 

 (non Hall.) 



Grapto. Quebec Group, p. 69, t. i, f. 1-9; ib. Nich. Q. J. 

 Geol. Soc. vol. xxiv, p. 135. 



Grapto. Grap. Quebec Group, p. 71, 1. 1, f. 10-15. ? D. 

 hirundo, Salt. (loc. cit.) ; ib. Nich. Q. J. Geol. Soc. vol. xxiv, 

 p. 135; Ann. Mag. Nat. Hist. 4 ser. vol. v, p. 340, t. 7, 

 f . 1 ; id. Hopk. and Lapw. Grapto. of Arenig and Llandeilo 

 Group, Q. J. Geol. Soc. vol. xxxi, p. 644, t. 33, f. 4. 



Grapto. Quebec Group, p. 82, t. 3, f. 1-8, t. 5, f . 9 ? id. 

 Hopk. and Lapw. Grapto. Arenig and Hand. Q. J. Geol. 

 Soc. vol. xxxi, p. 643, t. 33, f. 3. 



Vide D. Nicholsoni, Lapw. 



Grapto. Pal. New York, vol. i, p. 273, t. 74, f. 3; ib. Nich. 

 Q. J. Geol. Soc. vol. xxiv, p. 134; ib. Siluria, 4 ed. p. 61, 

 Foss. 12, f. 8. Dicranograptus, Hopk. Geol. Mag. vol. vii, 

 p. 356, t.16, f. 1. - 



Hopk. and Lapw. Grapto. of Arenig and Lland. Group, Q. J. 

 Geol. Soc. vol. xxxi, p. 643, t. 33, f. 2. 



Q. J. Geol. Soc. vol. xix, p. 138, woodcut p. 137, f. 13 e; ib. 

 Nich. vol. xxiv, p. 1 34. 



Geol. Mag. vol. iv, p. 109, t. 7, f. 16, 17. 



Graptolithus, Pal. New York, vol. iii, p. 515, f. 1, 2. D. an- 

 gnstifolius, Nich. Q. J. Geol. Soc. vol. xxiv, p. 525, 1. 19, 

 f . 8, 9. 



Climacograptus, Grapto. Quebec Group, p. 112, 1. 18, f. 11- 

 13. hiplograptus, Nich. Q. J. Geol. Soc. vol. xxiv, p. 139. 

 Vide Nich. Ann. Mag. Nat. Hist. 4 ser. vol. vi, p. 382, 1 870. 



Mem. Geol. Surv. vol. iii, p. 330, 1. 11 A, f. 1. 



Ann. Mag. Nat. Hist. 4 ser. vol. iv, p. 236, 1. 11, f. 12. 



Vide Climacograptus. 



Ann. Mag. Nat. Hist. 4 ser. vol. iv, p. 234, t. n, f. 8. 



' Cephalograptus,' Verst. Grauw. die Grapt. p. 26, t. 1, f. 28. 

 Diplo. Carrnthers, Geol. Mag. vol. v, p. 131, t. 5, f. 4; ib. 

 Richter, Zeitschrift, 1853, 1. 12, f. 16, 17. JD. tubulari- 

 formis, Nich. Geol. Mag. vol. iv, p. 169, t. 7, f. 12-15. 



Q. J. Geol. Soc. vol. xxiv, p. 526, 1. 19, f. 14, 15. 



Fucoides, Hist. Veget. Foss. t. 6, f. 9-12. Diplo. pristini- 

 formis, Hall, Grapto. Quebec Group, p. no, 1. 13, f.15- 

 17; ib. Nich. Q. J. Geol. Soc. vol. xxiv, p. 140, t. 5, f. 14 

 -15. Diplo. dentatus, Hopk. and Lapw. Grapto. of Arenig 

 and Lland. St. David's, Q. J. Geol. Soc. vol. xxxi, p. 656, 

 t. 34, f. 5 a-k. 



Geol. Mag. vol. ix, p. 504, t. 12, f. 5. 



Geol. Mag. vol. ix, p. 506, 1. 1 2, f . 8. 



Vide D. pristis. 



