1865.] DAWSON COAL-POKMATION. 151 



Calamites, Suckow. 



1. Calamites Suckovii, Brongn. 



This species is one of the most common in an erect position. It 

 has verticillate branchlets, with pinnate linear leajflets. 



M. C, Sydney (jB. Brown) ; Joggins {Lyell; J. W.D,) ; Grand Lake 

 {G. F. Hartt) ; F. C, Pictou {J. W. D.) ; Coal Creek {C. B. Matthew). 



2. C. CisTii, Brongn. 



M. C, Joggins (J. W.D,); Sydney (E. Brown); Grand Lake (C, F. 

 Hartt) ; Bay de Chaleur (Logan) ; Coal Creek [0. B. Matthew). 



Often found erect. Its leaves are verticillate, simple, linear, striate, 

 apparently one-nerved, and 3 inches long. 



3. C. CANN^FOHMis, Brongn. 



M. C, Joggins (Ijyell; J. W. D.); Sydney (E.Brown). 



4. C. EAMOsus, Artis. 



Possibly a variety of C. SucJcovii. 



M. C, Joggins (J. W. D.) ; Sydney (R. Brown). 



5. C. YoLTzii, Brongn. (C. irregularis, L. & H.) 

 M. C, Joggins (J". Tr.J5.). 



Often erect ; has large irregular adventitious roots. This species 

 is regarded by Brongniart as probably belonging to Calamodendron. 



6. C. DFBius, Artis. 



M. C, Sydney (JR. Brown); Joggins (J. W.D.; Logan); TJ. C, Pictou 

 (J. W. D.). 



7. C. NovA-scoTicA, spec. nov. PI. XII. fig. 89. 

 M. C, Joggins (J. W.D.). 



Ribs equal, less than a line wide, striated longitudinally. Joints 

 obscurely marked, and with circular areoles separated by the breadth 

 of three to four ribs. Bark of moderate thickness. 



8. C. NonosTJS, Schloth. 



This species has long slender branchlets, with close whorls of 

 short rigid leaves. 



M. C, Sydney (B. Brown) ; Grand Lake (0. F. Hartt). 



9. C. AEEifACEUs (?), Jager. 



This species is mentioned with doubt in Lyell's list. 



Equisetites, Sternberg. 

 EaiTisETiTEs cuETA, spoc. uov. PL XII. fig. 88. 



Short thick stems, enlarging upward, and truncate above ; joints 

 numerous; sheaths as long as the joints, with unequal acuminate 

 keeled points. Lateral branches or fruit with longer leaf-Hke 

 points. Has the characters of Equisetites ; but its affinities are quite 

 uncertain. 



M. C, Sydney (B. Brown). 



M 2 



