556 bulletin: museum of comparative zoology. 



Remarks. — Ceraurinus confluens may be distinguished from all 

 other species of the genus and of the other genera of the Cheiruridae 

 by the fact that the posterior pair of glabellar furrows do not open into 

 the dorsal furrows, but are separated from them by a narrow portion 

 of the glabella. 



Formation and locality. — Ceraurinus confluens is known only 

 from the Picton (Upper Trenton). The type is from Pefferlaw, On- 

 tario, and was collected by Mr. W. A. Johnston. It is now in the 

 collections of the Victoria Memorial Museum of the Geological 

 Survey of Canada. A second specimen was collected by Mr. E. J. 

 Whittaker at the same horizon at Collingwood, Ontario. 





