REPORT OF THE DIRECTOR I919 



91 



Note. Since writing the above two more remains of eurypterids 

 have been obtained in the Devonian plant-beds; one the cephalo- 

 thorax reproduced in text figure 31, and the other the small speci- 

 men seen in text figure 32. 



Fig. 31 Fig. 32 



Figs. 31, 32 Pterygotus cf. inexpectans nov. Natural size. 



The larger specimen was collected in the Oneonta sandstone at 

 the Manorkill near Gilboa, below the horizon of the tree trunks. It 

 is preserved in a sandstone that contains numerous brachiopod 

 shells^ mostly Spirifers, of the disjunctus type, and a new 

 Hydnoceras. The smaller is embedded in a mud shale full of plant 

 remains and recorded as having been collected in the Catskill beds 

 near Walton, N. Y. 



The cephalothorax apparently belongs also to the species here 

 described, but is strongly compressed from the front backward, as 

 is indicated by the folds paralleling the posterior margin and by the 

 bulging out of the cheeks, especially the left one. A restoration of 

 the shield to its original form would furnish an outline fairly cor- 

 responding to that of the type specimen. The compound eye was 

 preserved on the left side in the antero-lateral corner, but partly lost 

 in working out the specimen. The surface is slightly weathered and 

 rough on the right side which had been exposed for some time and 

 fairly smooth on the left which was protected in the matrix and 

 chiseled out. The specimen is mainly interesting on account of its 

 larger size and its association with a distinctly marine fauna. 



