113 



upper extremity. Surface annulated with several deep undulations of 

 growth, and longitudinally striated with very distinct septal sulci, about 

 four in the width of one line in the upper half, and five or six towards the 

 smaller extremity. The cup is about | of an inch in depth, obtusely 

 conical, and distinctly sulcated on the inside by the septal striae. In a 

 longitudinal poUshed section, the structure appears to be very compact, or 

 composed of very small cells, two or three in the width of one line, but 

 owing to the peculiar state of preservation of the specimen these cannot 

 be well observed. 



I have some doubts whether this species should not be referred to the 

 genus CyathopJiyllum, since the strongly striated surface of the cavity of 

 the cup would indicate that the radiating septa are more fully developed 

 than they are in Cystiphyllum. The species to which it bears the nearest 

 resemblance is C. Qreyi (Edwards and Haime) from the Wenlock lime- 

 stone at Dudley. It appears to be a larger and more strongly striated 

 species than that, and therefore I shall give it a distinct name for the 

 present, provisionally. 



Locality and Formation. — Anse a la Vieille, Bay of Chaleurs. Middle 

 Silurian. 



Collector. — Sir W. E. Logan. 



Stkombodbs gracilis. (N. sp.) 



Fig. 94. 

 Fig. 94. — Strombodes gracilis. 



Description. — CoraUum in large masses, consisting of cells from 2 to 3 

 lines in diameter, most of them pentagonal. Cup about 1 ILae in depth, 

 with an irregularly rounded central style ^ line in height, and one-third 

 or one-half the whole width of the corallite. There appear to be 30 or 40 

 septal striae on the inner side of the cup. 



Resembles S. diffluens (Lonsdale) but is much smaller. 



Locality and Formation. — Manitouwanmg, Lake Huron. Middle 

 Silurian. 



Collector. — ^A. Murray. 



