EiXPLANATION OP PLATES 211 



Fig. 



16 Frontal view of same, x 3 



17 Enlargement of reticulate surface, x 6 



18 Cranldium of a supposedly mature specimen, showing similar 



features, x 3 



19 Frontal view of same, x 3 



20 Lateral view of same, x 3 

 Pebbles of group 5 



Remopleurides (Caphyra) linguatus sp. nov. 



p. 56 



21 Dorsal view of cranidium and right free cheek. The shading 



represents the glabella as too convex. (Compare fig. 23) 

 The free cheek was not found in the potsition figured, x 3 



22 Lateral view of saime. x 3 " 



23 Frontal view of same, x 3 



24 Oramidium of the smallest specimen observed, x 4 



25 Lateral view of same, x 4 



26 Oranidium figured in a position to show the length and form 



of the tonguelike process of the frontal lobe, x 4 



27 Lateral view of free cheek, showing the delicate faceting of 



the eyes, and the rudderlik<? frontal doublure, x 5 



28 Thorax,, the central part destroyed by weathering, x 2 ' 



29 Enlargement of the pleurae, to ehow the fulcral tubercles, x 5 

 Pebbles of groups 5-7 



