﻿PLATE XI. 



UPPER SILURIAN ( WEN LOCK). 



Figs. 1 — 11. Homalonotus delphinocephalus, Green. 



1. „ „ From Dudley: the finest known. This 



is the specimen figured in the ' Silurian 

 System,' and is in Mr. Blackwell's 

 possession, la. Is a side view of 

 the same. 



2. „ „ A smaller specimen. (Mr. E. Hollier's 



collection.) 



3. „ „ A very young one. (Mr. Edgell's cabinet.) 



Invaluable, as showing the eyes. 3 a. 

 The same, magnified. Fig. 6. The 

 magnified eye. Dudley. 



4. „ „ Somewhat older, and also showing the 



lentiferous surface perfectly. (From 

 the cabinet of Mr. E. Hollier, junr.) 



5. „ „ The angle of the cheek, with the squamate 



granules.. (From Mr. Blackwell's 

 specimen.) 



6. „ „ Eye and free cheek of fig. 3, magnified, 



to show the eye-lenses. 



7. „ „ Labrum, interior view. (Mr. E. Hollier, 



junr.) 



8. „ „ A thorax-ring, the fulcrum close to the 



puncta which mark out the axis. 



9. 10. „ „ Pleurae enlarged, to show the squamate 



character of the granulation. 

 11. „ „ Tail from large specimen. (E. Hollier, 



junr.) 



All the above are from the Dudley Limestone. 



Fig. 12. Homalonotus cylindricus, Salter. See p. 116, figs. 27, 28 (woodcuts), for 



a more complete specimen. Woolhope Lime- 

 stone, Woolhope. (Cabinet of Mr. H. Edgell.) 



