Eearnsides, Elles, Smith — Palmozoic Rocks of Tomer oy, 127 



EXPLANATION OF PLATE VIIL 



Trinucleus concentricus var. Portlockii Salt. Eigs. 1, 2. 



1. Cephalic shield, not quite complete. 



Quarry close to Little River, Tirnaskea. 



2. Do. Do. 



Var. elongatus Portl. Eigs. 3, 4. 



3. Cephalic shield, nearly perfect. 



Quarry close to Little River, Tirnaskea. 



4. Portion of cephalic shield showing characteristic glabella. 



Quarry close to Little River, Tirnaskea. 



Var. arcnatus var. nov. Eigs. 5, 6. 



5. Cephalic shield, nearly perfect. 



Quarry close to Little River, Tirnaskea. 



6. Cephalic shield, fragment. Do. 



Trinucleus seticornis His. Eigs. 7, 8. 



7. Side view of cephalic shield, showing fold over. 



Quarry close to Little River, Tirnaskea. 



8. Cephalic shield, nearly perfect, showing tubercles on cheeks. 



Quarry close to Little River, Tirnaskea. 



Bionide cfr. euglyptus Ang. Eig. 9, 

 9. Cephalic shield, nearly perfect. Little River, Tirnaskea. 



