38 ANNALS OF SCOTTISH NATURAL HISTORY 



Pteraspis Mitehelli? — "A very large but obscure specimen," from 

 Bridge of Allan, figured by Lankester, op. cit Plate V. Fig. n. 



Cephalaspis sp. — Portion of a head showing the orbits as seen 

 from below, figured by Lankester, op. cit. Plate X. Fig. 2. 



Caudal fin of Cephalaspis, from Turin Hill, figured by Lankester, 

 op. cit. Plate XL Fig. 3. 



" Plate on the head of Holoptyehius nobilissimus." — P. Duff, op. cit. 

 Plate VII. Fig. 1. This is the anterior median plate of the 

 head of Bothriolepis major (Ag. ) 



Pteriehthys oblongus. — P. Duff, op. cit. Plate VIII. Fig. 2. The 

 subject of this figure is a specimen of Pterichtliys Milleri, Ag., 

 and a considerable amount of "restoration" enters into the 

 representation of the carapace. From Tynet Burn. 



Pteriehthys eornutus. — P. Duff, op. cit. Plate X. Fig. 2. This is 

 a small specimen of Pteriehthys productus, Ag. from Tynet 

 Burn. 



" Fragment of the lower jaw of a fish." — P. Duff, op. cit. Plate VI. 

 Fig. 1. This is a portion of a Holoptychian mandible, 

 probably of H. giganteus, Ag. Scat Craig. 



"Lower jaw of a smaller individual." — P. Duff, op. cit. Plate VI. 

 Fig. 2. This is the greater part of a small Holoptychian 

 mandible. Scat Craig. 



"Jaw of fish with teeth remaining in their places." — P. Duff, op. 

 cit. Plate VI. Fig. 3. Detached internal dentary bone of 

 Holoptyehius of which Mr. Duff says : " In hazarding a 

 conjecture I would refer this jaw to the genus GlyptolepisT 

 Scat Craig. 



Dendrodus biporeatus, Owen ( - Holoptyehius giganteus, Ag.) — De- 

 tached laniary tooth from Scat Craig, figured by P. Duff, 

 op. cit. Plate VI. Fig. 5. 



Dendrodus eompressus, Owen ( = Dendrodus biporeatus, Owen = 

 Holoptyehius giganteus, Ag.) — Detached laniary tooth from Scat 

 Craig, figured by P. Duff, op. cit. Plate VI. Fig. 7. 



Dendrodus sigmoideus, Owen ( = Holoptyehius nobilissimus, Ag.). 

 — Two detached laniary teeth from Scat Craig figured by P. 

 Duff, op. cit. Plate VI. Figs. 8 and 10. 



Dendrodus sigmoideus, Oiven ( = Holoptyehius nobilissimus, Ag.) — 

 Detached laniary tooth from Scat Craig figured by Agassiz, 

 " Poiss. Foss. v. gres rouge," Tab. 28, Fig. 3. 



