﻿PLATE XVII. 



Fig. 



1. Discinocaris gigas, H. Woodward. Left-hand lower corner of a test. British 



Museum. (Page 122.) 



2. — — — Crushed portion of a test. Cambridge 



Museum. (Page 123.) 



3. — — — Sketch of a large specimen by the late Mr. 



James Dairon. (The dotted outline has 

 been added to show the more probable 

 form of the shield. The lateral margins 

 in Mr. Dairon' s figure are evidently 

 artificial, and not the true margins ; nor 

 does it show the real antero-lateral 

 angles. Figs. 1 and 2 indicate the true 

 shape of the postero-lateral augles, and 

 the way in which the lines of growth 

 die out at the margins.) (Page 123.) 



4. — (?). Fragment. British Museum. (Page 123.) 



5. — (?). Some imperfect body-rings, flattened. British Museum. 



(Page 123.) 



6. Aptychopsis Salteri, H. Woodward. Right-hand valve. British Museum. 



(Page 109.) 



7. Peltocaris Carruthersii, sp. nov. Carapace. Copied from the 'Quart. Journ. 



G-eol. Soc.,' vol. xxii, pi. 25, fig. 6. (Page 

 116.) 



8. Tail-piece. British Museum. (Page 124.) 



9. 10, 11, 12. Tail-pieces. Cambridge Museum. (Page 124.) 



