DR. HERE ON THE FOSSIL FLORA OF BOVET TRACEY. 
1047 
natis, nervis tertiariis utrinque 2-4, subflexuosis, curvatis, angulo acuto egredien- 
tibus. 
Only a portion of a leaf, of 71 millims. in length ; it occurred in the clay of the 
26th bed. At the base it was probably 19 millims. in diameter; towards the apex it 
gradually tapers ; therefore it must probably have had a long apex, which however is 
not preserved. It very much resembles the former species, but differs by the tapering 
form, the smaller and very acute teeth, and the fewer tertiary nerves, which are 
undulated. A comparison with fig. 4, pi. 8 of the ‘ Flora Tertiaria ’ shows that it is not 
the exterior part of the former species. It approaches more to L. helvetiea. Hr. (Flora 
Tertiaria, i. p. 33, iii. p. 151), in the tapering of the pinnules, notwithstanding the fewer 
tertiary neiwes and the undulated secondary nerves. It differs from Aspidium dolma- 
ticum, Ett., in the smaller teeth, and fewer tertiary nerves. 
The margin is provided with very small and sharp teeth, which are very much bent 
towards the apex. The secondary nerves are thin, strongly undulated, and have on the 
under side mostly four, sometimes but three, on the upper one two or three tertiary 
nerves, which are also undulated. The lowest one is united with the lowest of the next 
secondary nerv^es, and forms with it a triangular acute areole, out of which springs a 
branch that advances to the next sinus. A little higher it is joined by two united 
tertiary nerves, also at an acute angle, and immediately under the sinus another one. 
This nerve directed to the sinus is also undulated. 
2. Pecopteeis, Br. 
6. Pecopteeis (HemiteliaI) ligxitum, Gieb. (Plate LV. figs. 4-6; LVI. figs. 1-11; 
LVII. figs. 1-7, magnified.) 
P. fronde pinnata, pinnis linearibus, longis, apice valde attenuatis et aeuminatis, basi 
plerumque breviter petiolatis, profunde inciso-serratis, nervis tertiariis furcatis, 
inferioribus valde curvatis, sinum attingentibus. 
Peoopteris lignitum, P. crassinervis, P. leucopetrce et P. angusta, Giebel, “ Paleontolog. 
Untersuchungen,” Zeitschrift fiir die gesammten Naturwissenschaften, 1857, p. 305, 
pi. 2. fig. 2. 
Aspidium lignitum, Fleer, Beitriige zur nahern Kenntniss der sachsisch-thiiringisch, 
Braunkohlenflora, p. 424, pi. 9. figs. 2 & 3. 
Aspidium Meyeri, Ludwig (non Heer!), Palaeontograph. viii. 2. p. 63, pi. 12. fig. 3. 
This is the commonest fern at Bovey ; it and Seguoia Couttsiw are the plants most 
commonly met with in this locality ; the petioles and pinnules are heaped up in the 
17th and 26th bed. They are only separated by thin layers of clay. On dissolving 
this, one is able to take the leaves out of it and preserve them in fluid (spirit, glycerine, 
water). They decompose in the air. 
This species had a large distribution in the tertiary period, but is confined to the 
MDCCCLXII. 7 D 
