388 Canadian Record of Science. 



divisions again once or twice cleft at their summits ; the 

 undivided and partially divided portions narrowest below, 

 widening above and widest at the commencement of each 

 division, averaging from three to four millimetres in 

 breadth in the narrowest places, and from fourteen to 

 fifteen mm. in the widest. 



Inmost or Birch Island, Kinwow Bay, Lake Winnipeg, 

 T. C.Weston, 1884: four nearly perfect and well-defined 

 specimens, and seven similar but imperfect ones. 



Chondrites cupkessinus. (Sp. nov.) 



Thallus frondose, continuous and consisting of a long, 

 slender and extremely narrow rhachis, with numerous 

 short, crowded and variously divided lateral ramifications: 

 base of attachment unknown. The rhachis is flat, erect, 

 nearly straight and scarcely more than half a millimetre 

 in its maximum breadth. The lateral ramifications are 

 linear, }3innately partite, or possibly verticillate, opposite, 

 divergent and spreading outward and a little upward. 

 They decrease very gradually in length from below 

 upward, and are either doubly bifurcate, bifurcate with 

 both of the ultimate ramifications trif urcate, or bifurcate 

 with one of the ultimate branchlets trifurcate and the 

 other single. 



Cat Head, Lake Winnipeg, D. B. Dowling and L. M. 

 Lambe, 1890 : one specimen, which has been split longitu- 

 dinally down the centre into two pieces of nearly ecpial 

 size. 



To the naked eye this specimen has much the appear- 

 ance of the polypary of a recent hydroid, and especially 

 of that of the well-known Sertularia cupressina, L., which 

 Professor Allman now refers to Thuiaria, When viewed 

 under an ordinary simple lens, however, it has obviously 

 more the aspect of a plant, although its minute tissues 

 are not preserved. There are no indications of any 



