g22 



PEOCEEDiNas or THE aEOLOGicAL SOCIETY. [May 7, 



variety of H, ohtusilohus, Goeppert {Sphenopteris trichomanoides, 

 Brongn.). 



53. Hymenophyllites obtusilobus, Goeppert. 

 Eoimd with the preceding. 



54. Hymenophyllites Geesdoepeii, Goeppert. PI. XV. %. 37. 

 Found with the preceding. 



55. Pecopteeis (Alethopteeis) decfeeens, sp. nov. PI. XY. fig. 



40 a, 5, c. 



Bijpinnate. Pimmles rather loosely placed on the secondary rachis, hut 

 connected hy their decurrent lower sides, which form a sort of margin 

 to the rachis. Midrib of each pinnule springing from its upper 

 margin and proceeding obliquely to the middle. Nerves very fine 

 and once-forTced. Terminal leaflet broad. 



This Fern so closely resembles Pecopteris Berlii and P. lonchitica 

 that I should have been disposed to refer it to one or other of these 

 species but for the characters above stated, which appear to be con- 

 stant. P. Serlii is abundant in the Lower Carboniferous of Northern 

 ISTew Brunswick, and P. lonchitica is the most common Pern through- 

 out the whole thickness of the Joggins Coal-measures ; but in neither 

 locality does the form found at St. John occur. On this account I 

 think it probable that the latter is really distinct. In Murehison's 

 ' Siluria,' 2nd edit., p. 321, a Pern from Colebrook Dale is figured 

 as P. lonchitica, which, so far as I can judge from the engraving, 

 may be identical with the present species. Locality, St. John. 



56. Pecopteeis (Alethopteeis) ingens, sp. nov. PI. XY. fig. 41 a, h. 



Pinnules inore than an inch wide, and three inches or more in 

 with nervures at right angles to the midrib and forlcing twice. 



Only a few fragments of pinnules of this species have been found in 

 the shales near St. John. They are usually doubled along the midrib, 

 as if it had been their habit to be folded in a conduplicate manner. 

 Their general aspect suggests a resemblance to the Mesozoic Taenio- 

 pterids rather than to the Pecopterids of the Coal-formation. • 



57. Pecopteeis (Alethopteeis). PI. XYI. fig. 49. 



Mr. Hartt has recently sent to me, from St. John, a pinna of a 

 Pecopteris having oblong, obtuse pinnules attached by the whole base, 

 with a slender midrib, and slightly repand edges. The nervures are 

 not preserved. It closely resembles A. obscura, Lesquereux, from the 

 Coal of Pennsylvania. 



58. Teichomanites (?). PI. XYI. fig. 50 a, h. 



A minute frond, collected at St. John by Mr. Hartt, may possibly 

 represent a plant of this genus ; but it may be merely the nervures 

 of a leaf whose parenchyma has been removed by decay. 



