124 ROYAL SOCIETY OF CANADA 



not until recently been gathered from below this level ; and their occur- 

 rence above that bed is capricious; they are found sparingly in beds 

 iSTos. 2 and 3, but according to Plartt are wanting from beds 4, 5 

 LTid 6 (except one doubtful occurrence) ; however several species are 

 found in Beds 7 and 8. On the eastern side of St. John Harbor 

 though quite a number of Ferns, Calamités and Cordaites are found, 

 Annularia (and Asterophyllites), are again conspicuously absent. 



AXXFLARIA LONGTFOLIA, Brongn. 



mutation Leavitti, Matt. 

 Bull. Nat. Hist, Soc, N.B. Vol, V. p. SOG. PI. IX. 



Stem about 3 mm: wide. Length hetween internodes 30-37 mm.; 

 about 24 leaves in a whorl; length of leaves 30-50 7nm.; width 3-6 mm. 

 There is a strong mid-rib and a slender, pointed tip. 



This form is an early mutation of Brongniart's Annularia longi- 

 folia and a very vigorous one, as may be seen by comparing it with 

 Feistmantel's figure.'^ The leaves are of about the same length, but 

 in some cases are twice as wide. It is also similar to A. longifolia 

 Brong. as figured by Lesquereux; his quotation of the specific char- 

 acters are as follows: — 



Stem narrowly striate; leaves in whorls of eighteen to ttventy- 

 four, lanceolate, spatulate, more or less abruptly acuminate; median nerve 

 broad, distinct; fructification in long cylindrical spil^es. 



This applies to examples from the Coal Measures. Lesquereux 

 further explains that the leaves on the primary stem vary from one 

 and a half to five centimetres in length and from two to three milli- 

 metres in breadth. They are generally larger above the middle, gradu- 

 ally narrowing downward to the point of attachment, and more rapidly 

 to the point. The mid-rib is broad and deeply impressed, and the 

 border of the lamina flexed or convex. Sometimes, especially upon the 

 shales, the leaves are flattened by decomposition and compression. 



Our specimens from the Da.doxylon oandstone agree in most par- 

 ticulars with the above description of the Carboniferous form by 

 Lesquereux. The number of leaves in a v/horl of the Devonian muta- 

 tion is fully as great as in the Carboniferous form, for if the apparently 

 missing leaves of the lower whorl in the specimen figure be lallowed 

 for, there would, perliaps, be thirty leaves in a whorl. The mid-rib 

 is depressed and the blade of the leaf on each side is convex. 



^Zittel's Palœontology, Vol. Ill (Plants) p. 1G2. 



