PLATE VII. 



Fin. Paoe. 



1. Fjiicrliiiirii.fi mvMiser/mPiifnfiis (Portlock), var. uov. fn.-^piimsvs. Head- 



shield and anterior part of thorax, showing impression of hypo- 

 stome and spines on sixth thoracic ring. x 8. Starfish Bed, 

 Thraive Glen . . . . . .80 



2. Ditto. X 3. Same horizon and locality . . .39 



3. Ditto. X 3. Same horizon and locality . . .39 



4. Gijlx'le loveiii, Linnarsson, var. r/irvanp)isis, Reed. Part of thorax with 



pygidium, showing pleural spines, x li. Starfish Bed, Thraive 



Glen . . . . . . .40 



•5. Ditto. Side view of complete individual, showing eyes, x l-i. Same 



horizon and locality . . . . .40 



0. fi/Ji('le heUatula, Dalman, var. nov. Jialclafclilensu. Imperfect thorax 



and pygidium, showing ornamentation of pleural lobes. x 2. 



Balclatchie group, Balclatchie . . . .41 



7. Gyhele michelli, sp. nov. Partially enrolled individual, x 2^. Bal- 



clatchie (iroup, Ardmillan . . . .42 



7a. Ditto. Top view of head-shield of same specimen, x 2^. . . 42 



71). Ditto. Front view of head-shield of same specimen, x 2| . .42 



7r. Ditto. Pygidium of same specimen, x 4 . . .42 



8. I>iiidymene cordai, Eth. & Nich. Impression of front part of head- 



shield, showing " spines." x 2^. Starfish Bed, Thraive Glen . 14 



9. Ditto. Head-shield with right half broken away, showing " spines." 



X 4. Same horizon and locality . . . .44 



