190 Mr Seward, Notes on the Bunhury Collection [Mar. 12, 



List, with notes, of type specimens. 



Pecopteris elliptica Bunb. 



Quart. Journ. Geol. Soc, Vol. ii. 1846, p. 84, PI. vii. 



Frostburg, Maryland. Goal-Measures. 



Schimper^ includes Pecopteris (Cyath.) distans Lesq. as a 

 synonym of this species, but Lesquereux ^ himself, on the grounds 

 of a few differences in detail, prefers to retain both specific names. 

 The fructification on Bunbury's specimen is very indistinct, and 

 affords no r-eal clue as to the nature of the sori or sporangia. 



Pecopteris bullata Bunb. 



Quart. Journ. Geol. Soc. Vol. iii. 1847. p. 283, PI. ii. fig. 1. 



Richmond, Virginia. Trias. 



In describing this fern Bunbury draws attention to the round 

 pits in which the sori are placed, as the peculiar and distinctive 

 character of the species. 



He goes on to say that " in one or two instances I think 

 I have observed an appearance resembling the reniform indusium 

 of the Genus Nephrodium.^' He suggests that, in all probability, 

 the plant belongs to the Aspidece and may possibly be a genuine 

 species of JSfephroditim. The type specimen does not permit 

 any very definite conclusion as to the nature of the fertile pinnae. 

 Most of the pinnules exhibit two rows of more or less oval pro- 

 jections contiguous with one another, and occupying nearly the 

 whole breadth of the segments between the midrib and the margin 

 of the pinnule. In one pinna, owing to a difference in the manner 

 of preservation, the projections are replaced by pits on either side 

 of the midrib. A careful examination of the specimen has con- 

 vinced me that the indusium-like appearance spoken of by 

 Bunbury is merely the outline of a small circular sorus with a 

 slight central depression. There is nothing to justify a reference 

 to the recent genus Nephrodium. 



Prof. Fontaine ^ refers to Bunbury 's species in his monograph 

 on the older Mesozoic flora of Virginia ; he changes the generic 

 name to Mertensides and figures several examples of frond frag- 

 ments. The sori are described as globular, and as consisting of 

 5 — 6 sporangia radially arranged. This description appears to 

 agree with the appearance presented by Bunbury's specimen, but 



1 Trait, pal. Y^g. Vol. i. p. 506. 



2 Geol. Pennsylvania, H. D. Kogers, Vol. ii. Pt. ii. 1858, p. 866. See also, Second 

 Geol. Surv. Pennsylvania, Kep. Progress P. Vol. i. 1880, p. 245. 



3 U. S. Geol. Surv. Monograph, vi. 1883, p. 35, Pis. xv.— xix. 



