174 ^"^ Ottawa Naturalist. [October 



On a new Ostracoderm {Enphanerops longcBvus) from the Upper 

 Devonian of Scaumenac Bay, Province of Quebec, 

 Canada. By A. Smith Woodward. Annals and Mag-. Nat. 

 Hist., yth Ser., Vol. V, No 29, pp. 416-419, pi. X, figs. 

 I, i«, i^, May, 1900. 



This new Ostracoderm is based on an imperfect specimen in 

 the J ex collection from the Scaumenac formation (Neo-Devonian) 

 of Gasp^ Peninsula, at present in the British Museum. Of the 

 head, " a pair of small skeletal ring-s " appear to indicate orbits. 

 Shagreen-like granules are seen within these supposed orbits. The 

 abdominal region shows small, narrow and deep scales in straight 

 rows, inclined forwards and downwards instead of backwards and 

 downwards, as is usually the arrangement in fishes. There is also 

 a suggestion ot calcified neural spines of an endoskeletal axis. 

 No traces of paired fins or supports are present. The caudal 

 region is well preserved in side view and is covered with sjales 

 disposed as in abdominal region, scarcely overlapping, "invested 

 with enamel and marked with a few antero — posteriorly— directed 

 ridges and grooves." There is a small remote dorsal fin, low and 

 triangular. This species is related to Cephalaspis, but is distin- 

 guished by absence of a continuous head-shield. It is the latest 

 survivor known of the earliest type of Ostracoderm armour. It 

 is the " first example of an Ostracoderm in which traces of the 

 axial skeleton of the trunk have been detected. Dr. Woodward 

 erects the family "Euphaneropid^ usually referred either to the 

 Osteotraci or to the Anaspida." 



H. M. A. 



Buttercups. — The only typical specimens o^i Rariuncnhis acris 

 in the herbarium of the Geological Surve)' are from Newfoundland 

 and Greenland. The common Buttercup found in Canada is 

 R. Steveni but it is doubtful whether this plant should rank as a 

 species though it is so considered in Europe. In R. acris the leaf 

 segments are linear ; in R. Steveni they are broad. Both species 

 may be common in Canada but among thirty sheets examined only 

 the two mentioned above were typical, R. acris. 



