OF COAL-MEASURE PLANT-IMPRESSIONS. 207 
PLATE 13. 
LEPIDODENDRON LORICATUM, sp. nova. (Figs. 27-37.) 
Fig. 27. No. 2506. Transition Coal Measures. Bayton Colliery, Forest of Dean. (Nat. size.) 
Fig. 28. No. 2506. Transition Coal Measures. Bayton Colliery, Forest of Dean. (x 2.) 
Fig. 29. No. 2470, Transition Coal Measures. Barfreston Boring, Kent. (X 3.) 
Fig. 30. No. 959. Ardwick Series. Manchester. (x 2.) 
Fig. 31. No.3109. Transition Coal Measures. Chilton Boring, Kent. (Nat. size.) 
Fig. 32. No.3109. Transition Coal Measures. Chilton Boring, Kent. (X 3.) 
Fig. 33. No. 1645. Upper Coal Measures. Flour Mill Colliery, Forest of Dean, Glouces- 
tershire. (Nat. size.) 
Fig. 34. No. 1645. Upper Coal Measures. Flour Mill Colliery, Forest of Dean, Glouces- 
tershire. (X 2.) 
Fig. 35. No. 1953. Coal Measures. Trafalgar Colliery, 2nd Division, Forest of Dean, 
Gloucestershire. (X nearly 3.) 
Fig. 36. No. 3130. Transition Coal Measures. Chilton Boring, Kent. (Nat. size.) 
Fig. 37. No. 8130. Transition Coal Measures. Chilton Boring, Kent. (X 3.) 
III. NEUROPTERIS OBLIQUA, Brongn., and N. CALLOSA, Lesq. 
1. INTRODUCTION. 
It appears to me that some confusion has arisen between the frond species 
known as Neuropteris obliqua, Brongn., Neuropteris acuminata, Zeiller, and 
Neuropteris impar, Potonié, At any rate, it will be admitted that consider- 
able differences of opinion have existed as to whether some or all of these 
forms are or are not identical, and as to the principal characters by which 
they may be distinguished from one another and from other species. I give 
here the results of my re-examination of these questions. The difficulty 
appears to arise from the dimorphic nature of a species here termed 
N. obliqua, Brongn., and also from a confusion which has arisen between 
one form of this species and a plant which I find to be entirely distinct, and 
which I believe to be the Neuropteris callosa of Lesquereux. 
I begin with a consideration of the former species. 
2, NEUROPTERIS OBLIQUA (Brongn.). 
Synonymy of Neuropteris obliqua, Brongn. :— 
A. Minor Pinnules. 
1832. Pecopteris obliqua, Brongniart, Hist. Vég. Foss. p. 320, pl. 96. figs. 1-4. 
1880. Odontopteris binervosa, Achepohl, Niederrhein.-Westfäl. Steinkohlengebirge, 
Oberhausen und Leipzig, p. 118, pl. 36. fig. 5. 
1903. Neuropteris obliqua, Arber, Quart. Journ. Geol. Soc. vol. lix. p. 4, pl. 1. fig. 2. 
1907. ? Mixoneura obliqua, Zalessky, Bull. Com. Géol, St. Pétersbourg, vol. xxvi. No. 134 
p. 404, pl. 15. figs. 11, 12, & 16. 
1907. Mixoneura obliqua, Zalessky, ibid. No. 135, p. 479, pl. 19. figs. 1, 3-9. 
1913. ? Neuropteris obliqua, Gothan, Abhandl. k.-preuss. geol. Landesanst. N.F. Heft 75, 
p. 207, ? pl. 50. fig. 5, pl. 53. fig. 5. 
