1" 



T 



3 



It is farther to be observed that this fern occurs with a group 

 of species which I have shown to be distinct not only from those 

 of the Coal Formation but from those of the Millstone Grit and 

 those of the Lower Carboniferous Coal-measures or Hortou series 

 (sub-Carboniferous of some American geologists), which sub- 

 floras arc well developed in the Acadian provinces, and overlie 

 stratigraphically the beds holding the fern which is the subject 

 of this note and its associated fossils. 



I may add here Hartt's description of the plant and my note 

 on it, from my Report of 1870 : — 



^'PeCOPTERIS (AsPIDITES ?) SERRULATA, Hartt. — (PI. XVIII, 

 Figs. 207 to 209.)— Acad. Geol. p. 553, Fig. 1)2.— M.D., 

 St. John, New Brunswiek." 

 Tripinnate ; pinna short, alternate, close or open, lanceolate, 

 very oblique, situated on a rather slender, rounded, sub- 

 flexuose rachis ; pinnules small, linear lanceolate, crenulate, 

 rcvolute, moderately acute, oblique, sessile, decurrent, widest 

 at the base, open, separated from one another by a space 

 ecjual to the width of a pinnule, slightly arched towards the 

 point of pinna ; longest at base of pinna, decreasing thence 

 gradually to the apex ; terminal pinnule elongated. Median 

 nerve entering the pinnule very obli(juely, floxuous, running 

 to the apex. Nervules very few, obli(jue, simple, and .some- 

 what rarely forking at the margin." 



"Numerous additional specimens of this species confirm Prof. 

 Hartt's determination of its distinctness from P.pUnnos<i, Brongt. 

 It perhaps more strongly resembles Goeppert's F. S'desinai ; but 

 this last has broader nnd more closely arranged pinnules decur- 

 rent on the petiole. It may be taken as a Devonian representa- 

 tive of the delicate Pecopterids of which the species above named 

 are Carboniferous typos. Mr. Hartt's specimens enable me to 

 represent its habit of growth. Schimpor (, tes under this name 

 a Carboniferous species of Lesquereux. But Lesquareux's species 

 is Alethoptf/ris scrruld," (This was subse(|ueutly corrected by 

 Schimper in the Supplement to his Palteontologie V(^getale.) 



