PLATE IX. 
Fig. Pa g e 
1. Pteraspis rostrata (Ag.); transverse section of dorsal shield, 
in outline.—Lower Old Bed Sandstone ; Goldtops, 
Newport. Monmouthshire. [P. 5037.] 162 
2. 2 a. Ditto? ; ventral shield (“ Scaphaspis lewisi ”), inferior 
and lateral aspects, two-thirds nat. size.—Lower Old 
Bed Sandstone ; Kentchurch, Herefordshire. 
[P. 5861.] 164 
3. Cyathaspis banJcsi (Huxl. & Salt.); portion of dorsal shield, 
outer aspect, twice nat. size, showing ornament.—Upper 
Silurian Bone-bed; Martel, near Ledbury. 
[P. 3241.] 172 
4. Cyathaspis macculloughi, sp. nov.; dorsal shield, visceral 
aspect and partly an impression of outer aspect.—Lower 
Old Bed Sandstone; Bodenham. [P.4797.] 172 
5. Cephalaspis campbelltonensis , Whiteaves ; dorsal shield, ' 
imperfect posteriorly, shown as impression of visceral 
aspect, two-thirds nat. size.—Lower Devonian ; Camp- 
bellton, New Brunswick. [P. 5479.] 191 
6. Cephalaspis murchisoni , Eg. ; imperfect inferior rim of 
shield.—Lower Old Bed Sandstone Passage Beds; 
Ledbury. [P. 6111.] 190 
7. 7 a. Didymaspis grindrodi , Lank.; ventral shield, visceral 
aspect, and transverse section of matrix lying between 
dorsal and ventral shields.—Lower Old Bed Sandstone ; 
Bush Pitch, Ledbury. [P. 5043.] 200 
8. 8 a. Ditto ; imperfect dorsal shield, with portion of tuber¬ 
cular ornament enlarged four times. — Ibid. 
JT. 5313.] 200 
