PLATE V. 



Fig. Page. 



Remopleurides barrandei, Etheridge, jim., and Nicholson. 31. 



1. Head-shield, middle portion. X 4. Balclatchie. Mrs. Gray 's Collection. 



(Figured by Nicholson and Etheridge, ' Mon. Silur. Foss. Girvan,' 

 _ pi. x, fig. 13.) 



2. Ditto with expanded tongue. X 3. Balclatchie. Mrs. Gray's Collec- 



tion. 



3. Ditto. X 8. Balclatchie. Mrs. Gray's Collection. 



4. Outline drawing of specimen in Hunterian Museum, Glasgow. X 3. 



Balclatchie. 



Remopleurides bicornis, sp. nov. 33. 



5. Head-shield, nearly complete middle portion. X 3. Dow Hill. Mrs. 



Gray's Collection. 

 G. Ditto. X 3. Same locality and collection. 



7. Ditto, showing the two frontal spines. X 3. Same locality and collec- 



tion. 



8. Side view of impression of glabella, showing the frontal spines. X 3. 



Same locality and collection. 



9. Side view of cast of glabella. X 3. Same locality and collection. 



10. Head-shield, imperfect middle portion, with strong longitudinal grooves. 



X 3. Same locality and collection. 



11. Head-shield with one free cheek attached. X 3. Same locality and 



collection. 



12. Ditto. X 3. Same locality and collection. 



13. Free cheek, side view, showing eye. X 3. Same locality and collec- 



tion. 

 13 a. Portion of eye of same specimen, showing lenses. X 10. 



14. Portion of thorax. X 3. Same locality and collection. 



15. One thoracic segment. X 3. Same locality and collection. 



10. Pygidium with one thoracic segment attached. X 5. Same locality 

 and collection. 



Remopleurides colbii, Portlock. 



1 7. Head-shield with portion of thorax attached. X 2. Drummuck. Mrs. 



Gray's Collection. (Figured by Nicholson and Etheridge, ' Mon. 



Silur. Foss. Girvan,' pi. x, figs. 8, 8 a.) 

 17a. Side view of same specimen. X 2. 

 17 b. Portion of eye of same specimen, showing lenses. X 10. 



