﻿PLATE XY. 



Fig. Page 



1. Onychodus anglicus, A. S. Woodw. ; section of presym- 



physial bone, with bases of teeth, twice nat. size. — 

 Lower Old Red Sandstone ; Bush Pitch, Ledbury. 



[P. 6252.] 393 



2. Amblypterus traquairi, sp. nov. ; lateral aspect, nearly 



three-quarters nat. size. — Lower Permian ; Lebach. 



[P. 994, P. 3457.] 439 



3. Acrolepis wilsoni, Traq. ; scale, outer aspect, twice nat. 



size.— Yoredale Rocks ; Belper. [P. 5329.] 507 



4. Acrolepis (?) digitata, sp. nov.; scale, outer aspect, twice 



nat. size. — Karoo Formation ; Graaf Reinet District, 

 Cape Colony. [47080.] 509 



5. Platysomus gibbosus (Blainv.) ; portion of small trunk, 



lateral aspect, showing pelvic fins. — Marl Slate ; Midde- 

 ridge. [P. 1606.] 545 



