PLATE VIII. 



Pia. Page. 



1. Glu'iriifiis Ircis/pi/cnsi'^, Reed. Imperfect liypostome. x 2. Starfish 



Bed, Thraive Glen . . . . .45 



2. Splixvexochiis in.ints, var. iiov. httldatcliicihuix. Pygidiuui. x 2. Bal- 



clatcliie Group, Balclatcliie . . . .47 



o. Slanrocejjkalus (jlohicc^^a, Portlock. Pyg'idiuin. x 5. Balclatcliie 



Group, Dow Hill . . . . .48 



4. Plidcojis {(Jhdsiiiops) his.srfi, Heed. Hypostouie in position Ijelow liead- 



shield. X 2. Starfish Bed, Thraive Glen . . . 48 



5. PhacojJH {Pteri/(juiii,et(>jjt(.'<) refardatus, sp. nov. x 2. Starfish Bed, 



Thraive Glen . . . . . .49 



5^/. Ditto. Side view of same specimen, showing" height of eyes. x 2 .49 



bl>. Ditto. Pygidium of same specimen, x 4 . .49 



6. Ditto. Impression of middle-shield of another specimen, x ;j. Same 



horizon and locality . . . . .49 



7. Ditto. Glabella of another specimen. x 2|. Same horizon and 



locality . . . . . .49 



8. Plidcops {Fh'ri/ijoiiietopns) Imiiti'ii, s[). nov. Middle-shield and thorax. 



X ;]. Balclatcliie Group, Balclatcliie . . .52 



'.». Ditto. Impression of middle-shield of another specimen. x 5. Same 



horizon and locality . . . . .52 



10. Pluicojh'i (D(iliiuiiiitiii(() (liiterouh'HSjSi). nov. Pygidium. x 2-|. Starfish 



Bed, Thraive Glen . . . . .53 



11. Ditto. Pygidium. x 2. Same horizon and locality . . 53 



1 2. Ditto ?. Portion of two pleurne of pygidium, showing ornamentation 



of shell. X 10. Inset, x 25. Whitehouse Group, Shalloch Mill 53 



