122 Systematic Paleontology — Middle Devonian 



In general this s2)ecies shows <^reat variations in mode of growth and in 

 the relative size of the vesicles. Some of the cylindrical specimens are 

 more than a foot in length while the turbinate ones are much shorter. 



The few Maryland specimens are turbinate in form, tapering rapidly 

 toward the base; the largest one with a length of over 40 mm. (the base 

 is wanting) and a diameter of about 37 mm.; the exterior is strongly 

 wrinkled concentrically. A horizontal section shows a thick mass of ves- 

 icular tissue which is denser near the wall, faint septa on its inner surface 

 and a calyx of considerable diameter, which on tlie section plane has a 

 diameter of 16 mm. wliere the entire diameter of the coral is 35 mm. 



Occurrence. — Eomxey Foumation, Hamilton Member. East bank 

 Evitts Creek below Wolfe Mill. 



Collection. — Maryland Geological Survey. 



VERMES 



Class ANNELIDA 



Order CHAETOPODA 



Suborder ERRANTIA 



Genus POLYGNATHUS Hinde 



Polygnathus sp. 

 Plate YII, Fig. 6 



Polygnathus sp. undet., Kindle, 1912, BulL U. S. GeoL Surv., No. 508, p. 67, 

 pi. li, fig. 5. 



Description. — Base slightly arched; teeth neariy uniform in size, ten 

 or more in number, conical and acutely pointed. The base has a length of 

 about 3 mm. and the teeth a height of i/o mm. 



The only specimen which has been observed is incomplete, a portion 

 of the base and the basal portion of some of the teeth having been broken 

 away. 



Occurrence. — Eomney For]\iatiox, Onondaga Member. Touoloway, 

 in black lilocky shale. 



Collection. — U. S. National ^luseum. 



[E. M. Kindle.] 



