Hughmilleria shawangunk nov. 



Page 308 

 See plate 4 



1-9 Head shields having for the most part the subtriangular elon- 

 gate outline and marginal eyes characterizing the species 

 H. s o c i a 1 i s . In these details there is however some 

 variation; in the very small heads represented by figures 3, 

 5 and 8, all trace of eyes is practically wanting. It is quite 

 probable that the minute head shown in figure 9 with its 

 large intramarginal anterior eyes and ocellar mound repre- 

 sents the following species. Actual variations in position 

 of the compound eyes in this species are apparently from 

 submarginal and marginal to intramarginal. 



Eurypterus ? cicerops nov. 



Page 307 



10 This singular head shield has the lobes of the compound eyes 

 small, circular, greatly elevated and anterior with a definite 

 development of the ocellar mound. The body is regarded 

 as a young stage of a species whose adult form is not yet 

 recognized. 



