140 



Chondrites (Bythotrephis) cuneatus. (N. Sp.) 



Fig. 8. Chondrites (Bythotrephis j cuneatus. One of the most perfect specimens known 

 to the writer, from Cat Head, Lake Winnipeg, and of the natural size. 



Thallus frondose, continuous, devoid of midrib or veins, compressed, 

 almost flat, and consisting of a nearly straight and rather narrow central 

 axis, with both terminal and lateral, simple or deeply bifurcate, divergent, 

 elongated and narrowly wedge-shaped divisions, at short but irregular 

 intervals. The central axis does not much exceed three millimetres in 

 breadth, in any of the specimens known to the writer, and the terminal 

 and lateral divisions average from three-quarters of an inch to about an 

 inch in length, and from three to four millimetres in breadth at their 

 subtruncate apices. Base of attachment unknown ; minute structure 

 not preserved. 



Apparently not uncommon at Cat Head, Lake Winnipeg, where well 

 defined but not quite perfect specimens, in a similar state of preservation 

 to those of C. paiulus, were collected by T. 0. Weston in 1884; and 

 three miles west of Cat Head, where a few good specimens were obtained 

 by D. B. Dowling and L. M. Lambe in 1890. 



These fossils bear a certain general resemblance to the Splienothallus 

 angustifolius of Hall, as figured on Plate 68 of the first volume of the 

 Palaeontology of the State of New York, and the writer has long been 

 under the impression that they might possibly represent a local variety 



