PLATE 4 



Figs. I, 2, T,. Coccostits parvidiis, n. sp. ■ Cotypes, about natural size. The speci- 

 mens are impressions in shale, and the figures are from squeezes made from them. 

 Originals of i and 3 are on one slab. Page 29. 



1. Two cranial plates, showing the tuberculated ornamentation. E 2371. 



2. Postero-medianventral, showing outer, ornamented face. E 2372. 



3. Median occipital, in inner, or visceral view. 1\ 2371. 



Fig. 4. Coccosteiis sp. Postero-ventromedian, in inner view; about natural size. 

 E 2377, p. 31. 



Fig. 5. Coccosteiis sp. Postero-ventromedian, in outer view. X f. E 2376, p. 31. 



206 



