PALEOZOIC. 



PISCES. 



CAMBRIAN AND SILURTAN. 



CAMBBIAN. LOWEB SIL. 



UrrEB SILURIAN. 



SPECIES. 



CEPHALASPID.E (HetEBOSTEACi). 



Pteraspis Kner, 1 847 



Cephalaspis (part) Agassiz, 1835 

 — Banksii Hux. S( Salt. . . . 



— Ludensis Salt 



— truneatus Hux. ${ Salt. 



Sclerodus Agassiz, 1839.. 



— pustuliferus ... Ag 



Cephalaspid^ (Heteeosteaci). 



Scaphaspis Lankester, 1 864 



— Ludensis Salt 



— truneatus Hux. <$■ Salt. . 



Sphagodus .'. Agassiz, 1 839 . 



— pristodontus . . . Ag 



Thelodus Agassiz, 1839., 



— parvidens Ag 



REFERENCES. 



GANOIDEI. 



Q. J. Geol. Soc. vol. xii, p. 100, t. 2, f . 2 a-d, 3 ; id. lb. vol. xiv, 

 p. 274, 1. 15 ; ib. Siluria, 4 ed. p. 240, Foss. 68, f. 2. 



Vide Scapbaspis. 



Vide Scaphaspis. 



PLACOIDEI. 

 Vide Eukeraspis pustuliferus. 



GANOIDEI. 



Pteraspis, Ann. Mag. Nat. Hist. 3 ser. vol. iv, p. 45, wood- 

 cut, p. 46. Scaphaspis, Lankester, Mono. Fishes of O. R. S. 

 Pal. Soc. p. 25, t. 3, f. 4. 



Pteraspis, Q. J. Geol. Soc. vol. xii, p. 100, t. 2, f. 1. Scaph- 

 aspis, Lankester, Mono. Fishes of 0. R. S. Pal. Soc. p. 34, 

 t. 2, f. 1-3, 1868. Pteraspis, Siluria, 4 ed. p. 240, Foss. 68, 

 f. 1. 



Vide Pterygotus problematicus (Crustacea, p. 67). 



PLACOIDEI. 



Sil. Syst. p. 606, 704, t. 4, f. 24-36; ib. Siluria, 4ed. t. 35, 

 f. 18. (Shagreen). 



129 



