160 PROCEEDINGS OF THE GEOLOGICAL SOCIETY. [DoC. 20, 



2. M. HTJMiLE, spec. nov. PI. YIII. fig. 33. 



stem 2-5 inches in diameter ; leaf-scars prominent, flattened, and 

 broken at the ends, 1 inch wide. Surface of the stem marked with 

 irregular furrows, and invested with a carbonaceous coating. An 

 internal axis, nearly 2 inches in diameter, with a coaly coating, sends 

 oif obliquely thick branches to the leaf-scars. This is a very re- 

 markable specimen, and throws much light on the structure of 

 Megaphyton. Unfortunately the minute structures are not pre- 

 served. 



M. C, Sydney (B. Brown). 



Genus Lepidodendeon, Sternberg. 



1. Lepidodendeok coehtjgatum, Dawson, Quart. Journ. Geol. Soc. 



vol. XV. PI, XI. fig. 53. 



Areoles elongate ovate, acute at both ends, with a ridge along 

 the middle, terminating in a single elevated vascular sear at the 

 upper end. In certain states the vascular mark appears in the 

 middle of the areole. In young branches the areoles are contiguous 

 and resemble those of L, elegans. In old stems they become sepa- 

 rated by spaces of longitudinally wrinkled bark ; in very old stems 

 these spaces are much wider than the areoles. Leaves linear, 1 inch 

 or more in length, usually reflected, one-nerved. Cones (Lepi- 

 dostrohi) terminal, short, cylindric, with numerous short, acute-tri- 

 angular scales. Structure of stem. : — a central pith with a slender 

 cylinder of scalariform vessels, exterior to which is a thick cylinder 

 of cellular tissue and bast fibres, and a dense outer bark. 



Yar. verticillatum has the areoles arranged in regular decussate 

 whorls instead of spirally. This difference, which might at first 

 sight seem to warrant even a generic distinction, is proved by speci- 

 mens in my possession to be merely a variety oi pliyllotaxis. 



This species is eminently characteristic of the Lower Carboni- 

 ferous Coal-measures, and has not yet been found in the Middle Coal- 

 formation. Fragments of bark resembling that of this species, occur 

 in the Coal-formation of Bay de Chaleur, along with leafy branches 

 of L&pidodenclron, which resemble those of this species, though, I 

 believe, distinct. 



L. C, Horton, &c. (0. F. Harttj J. W. D.) ; Norton Creek, &c., 

 New Brunswick (G. F. Matthew). 



2. L. PiCTOENSE, spec. nov. PI. IX. fig. 37. 



Areoles contiguous, prominent, long oval, acuminate, separated 

 in young stems by a narrow line ; breadth to length as 1 to 3, or 

 less ; lower half obliquely wrinkled, especially at one side. Middle 

 line indistinct. Leaf- scar at upper end of areole, small, triangular, 

 with traces of three vascular points, nearly confluent. Length of 

 areole about 0-5 inch. Leaves contracted at the base, widening 

 slightly, and gradually contracting to a point ; ribs three, central 

 distinct, lateral obscure ; length 1 inch. Cones borne at the ex- 

 tremities of the smaller branches, oblong, obscurely scaly. 



In habit of growth this species resembles L. elegans, for which 



