SOME NEW DEVON IC FOSSILS 



155 



limulurus, the well known Upper Siluric species of New York, 

 but therein the resemblance ceases. 



Lower Devonic. Probably from Cape Rosier, P. Q. 



Dalmanites dolbeli nov. 



Certain cephala and pygidia which there are good reasons for 

 assigning to each other present many points of resemblance to 

 several well known species of the same subgeneric type. The lat- 



Dalmanites dolbeli 



ter are D. pleuroptyx of the New Scotland beds (Helder- 

 bergian) , D. stemmatus of the Oriskany and D. anchiops 

 of the Schoharie grit. Generally speaking these four species are 

 alike in the following respects : They are all forms which attain 

 a large size, have notably short and broad cephala, with the first 

 and second glabellar lobes fused distally and elevated to the eye 

 lobe, frontal border with a row of crenulations at the edge, the 

 more conspicuous being terminal, grooved eye base, faint if any 

 groove along the lateral facial suture, and inosculating surface 

 markings on the cheeks. The tails are broadly triangular and 

 sparse ribbed ending in caudal spines not greatly extended. 



