1862.] DAWSOJf — DEVONIAN PLANTS. 319 



features of that antique group of Cyclopteroid Ferns so highly 

 characteristic of the Devonian and Lower Carboniferous beds. 



This group of Perns, including the present species, with O. JacTcsoni, 

 C. ohliqica, C. Hihernica, and others, is no doubt generically distinct, 

 as Lesquereux very properly maintains, from the Cyclojpterides of the 

 Coal-measures; but this industrious observer has unfortunately 

 applied to it the generic name Noeggeratliia, which is used by linger, 

 Goeppert, and others for leaves with parallel striation and supposed 

 to be monocotyledonous. On this account, rather than increase the 

 confusion of the nomenclature, I in the meantime retain, with the 

 above explanation, the name Cyclopteris. The present species occurs 

 in the Chemung group of ]S"ew York. 



40. Cyciopteeis Jacksoni, Dawson. 

 ^Canad. Nat.' vol. vi. p. 173, fig. 9. 



*^ Frond hipinnate; racliis stout and longitudinally furroived ; ^inn(^ 

 alternate; jpinnules obliquely ohovate, imbricate, narrowed at the 

 base, and apparently decurrent on the petiole ; nerves nearly parallel^ 

 dichotomous ; terminal leaflet large, broadly obovate or lobedJ' 



This species, first described, in my paper in the * Canadian IS'atu- 

 ralist,' from a specimen found at Perry, occurs also in small frag- 

 ments at St. Jolm, and large specimens occur in the collection of Prof. 

 Hall from the Old Red Sandstone of Montrose, New York. It is 

 closely allied to C. Hibernica, and is its American representative. 



41. Cyclopteeis obtusa, Lesquereux. PL XY. fig. 33. 



To this species, described by Lesquereux, from the Old Eed Sand- 

 stone of Pennsylvania, I refer a beautiful Pern not unfrequent in the 

 shales near St. John. Lesquereux places it, for the reasons above 

 mentioned, in the genus Noeggerathia. 



42. Cyclopteeis valida, sp. nov. PI. XYII. fig. 52. 



Tr'ipinnate ; primary divisions of the 7'achis stout and wrinMed. 

 Pinnce regularly alternate. Loiver pinnules nearly as broad as 

 long, deeply and obtusely lobed, narrowed and decurrent at the 

 base ; regularly diminishing in size and breadth toward the point, 

 and the last pinnules narrowly obovate and confluent with the ter- 

 minal pinnule. Nerves delicate, several times dichotomous. 



This is the most perfect and beautiful of the St. John Perns. It 

 resembles at first sight Sphenopteris macilenfa, L. & H. ; but on 

 examination it differs materially in details. It is an elaborate and 

 ornate example of the peculiar type of Oyclopteris already referred 

 to as characteristic of the Upper Devonian Period. 



43. Cyclopteeis vaeia, sp. nov. PI. XY. fig. 34. 



Pinnate (or bipinnate). Pinnce with a thich petiole. Pinnules de^^ 

 creasing in size to the terminal one, which is ovate and lobed. Pin- 

 nules oblirpie, decurrent on one side. Nerves frequently dichotomous. 



This Fern has been found only in fragments. It seems to have 



