PALEOZOIC. 



PTEEOPODA. 



CAMBEIAN AND SILURIAN. 



CAMBBIAN. lOWEE SlI. 



TJPPEB BIIUEIAN. 



SPECIES. 



Hyaleid^. 



Pterotheca Salter i 1852 . . 



Oleodora PeV.etie*. 1810 



Cleoderma Sail, 1861.. 



— avriostris Sail 



— corrugata Salt 



— transversa Fortl.. 



— iindulata Salt. . 



Salterella Billings, 1861 



Hyaleid^. 



Stenotheoa Salter, 1866 .. 



Cyrtotheca Salter 



— cornucopia Salt 



Hyaleid^. 



Theoa feroej-Jy, 1844 



Hyalites ? Eichwald, 1 840 



Puffi^ncuhis ... Barrande, 184 



— alata Salt 



— ariceps Salt 



— antlijua SicJcs 



— arata Salt. 



— bijugosa Salt 



— Caereesiensis ... Hicks 



— cometoides .... 



— coCTUgata Salt. 



— cuspidata Salt. 



— Davidii Hicks.. 



— Forbesii Sharpe 



— HarkneBsi Hicks... 



— Meneevensis Salt. ... 



— obtusa Salt. . . . 



— operculata Salt, ... 



penultima Salt. 



reversa Salt. 



118 



REFERENCES. 



THECOSOMATA. 



Doubtful species. 



Brit. Assoc. Rept. 1853 (sect.), p. 61; ib. Mem. Geol. Surv. 

 vol. iii, p. 363, woodcut 18, 



Siluria, 4 ed. p. 199, Foss. 41, f. 4. 



Mem. Geol. Surv. vol. iii, Geol. N. Wales, p. 274. 



Vide Annelida, p. 36. 



THEcbsOMATA. 

 Hicks, Q. J. Geol. Soc. vol. xxviii, p. 180, t. 7, £.12,13. 



THECOSOMATA. 



Centrotheca, Mem. Geol. Surv. vol. iii, p. 253, 1. 10, f. 25. 



Mem. Geol. Surv. vol. ii. pt. i, p. 355, 1. 14, f. i. 



Q. J. Geol. Soc. vol. xxvii, p. 400, 1. 16, f. 13. 



Mem. Geol. Surv. vol iii, p. 352, 1. 10, f. 15-21 (? 17,18). 



Mem. Geol. Surv. vol. iii, p. 351, 1. 10, f. 19, 20. 



Q. J. Geol. Soc. vol. xxxi, p. 189, 1. 11, f. 7. 



Q. J. Royal Geol. Soc. Dublin, 1 861, vol. ix, p. 300, i, t. 4, f . 8 ; 

 ib. Expl. sheet, No. 133 ; Mem. Geol. Surv. Irel. p. 1 2, f . 4. 

 ? Gonophores of graptolites. 



Q. J. Geol. Soc. 1864, vol. xx, p. 238, 1. 13, f. 10; ib. Brit. 

 Assoc. Rept. 1865, p. 285. 



Mem. Geol. Surv. vol. iii, p. 353, 1. 10, f. 25. (Sub-genus, 

 Centrotheca.) 



Q. J. Geol. Soc. vol. xxix, p. 50, t. 3, f. 28, 29. 



Q. J. Geol. Soc. vol. ii, p. 314, 1. 13, f. i. 



Q. J. Geol. Soc. vol. xxxi, p. 189, 1. 10, f. 11. 



Cat. Camb. and Sil. Foss. Mus. Pract. Geol. p. 11. 



Mem. Geol. Surv. vol. iii, p. 352, vfoodcut 17. 



Mem. Geol. Surv. vol. iii, p. 351, t. lo, f. 22-24. 

 theca.) 



(Cleido- 



Brit. Assoc. Rept. 1865, p. 285; ib. Hicks, Q. J. Geol. Soc. 

 vol. xxviii, p. 180, t. 7, f. 15, 16. 



Silm-ia, 2 ed. Foss. 10, f. 21; ib. 4 ed. p. 51, Foss. 11, 

 f. 21, and p. 199, Foss. 41, f. i. T. triangularis, Hall, 

 Pal. New York, vol. i, p. 313, t. 87, f. i. T. reversa. 

 Salt. Mem. Geol. Surv. vol. iii, p. 353, woodcut 14, f. 6, 

 p. 347- 



