33 Olsson, Devonian Fossils 7 



never been described, but the characters of the stem seems to 

 place it in this family. 



Echinocaris punctata (Hall) Whitfield Plate 7, Figs. 2, 3, 4. 



This species, of which two individuals were found associated 

 with Spirifer mesastrialis and Cryptonella eudora, was collected in 

 the Ithaca shale beds of the Portage formation, as they are ex- 

 posed in the McGraw or University quarry, which is situated at 

 the lower end of the Cornell Campus. Comparison with forms 

 from the Hamilton show no characters to distinguish the two 

 from each other. It is interesting to note its appearance in higher 

 beds, associated with recurrent Hamilton species, and as having 

 changed but little in the time interval. 



