CANADIAN PERIOD. 51 



RADIATA. 



Class HYDROZOA. 



Order HYDROIDA. 

 Family GRAPTOLITIDJ]]. 



Genus PHYLLOGRAPTUS Hall, 1858. 



Phyllograptus Loringi White. 



Plate III, fig. 1 a and 6. 



Phyllograjjtus Loringi White, 1874, Exp. '& Surv. west 100th Merid., Prelim. Rep. 

 Invert. Foss., 9. 



Stipe apparently having the usual qvtadripartite fonn of the genus ; 

 the foliate expansion having a somewhat m-egular elongate-oval outline 

 and a moderately narrow axis. Cellules leaving the axis at different angles 

 with it in different parts of the stipe, ascending along the middle portion 

 so as to form an acute angle with the axis, then sweeping outward with an 

 increasing curvature to the lateral margins, where they are at right angles 

 with the axis, or in some parts of the length of the stipe slightly recurv- 

 ing. Toward the apex, the cellules are less curved and form more acute 

 angles with the axis. Each cellule gradually biit slightly increases in size 

 as it extends outward to the margin, where there are thirteen or fourteen 

 in the space of a centimeter. Each cellule is provided at its aperture 

 with a strong, prominent, recurving lower lip, the edges of which in our 

 example, it being compressed, have somewhat the appearance of spine-like 

 appendages. The stipe being broken at the lower end, the shape of that 

 part is known only by inference, and for the same reason the full length 

 has not been accurately ascertained, but it was apparently about four 

 centimeters long; width, at about midlength, one and a half centimeters. 



This species has the general aspect of P. ti/pus Hall, but it differs from 

 that species in the size of its cells and the character of its cell-apertures. 

 According to Professor Hall, P. typus has a maximum of twenty-six cells 



