plants from the Devonian rocks 99 
Psilophyton* and more especially with certain figures given by 
Feistmantel+ of specimens from Rothwaltersdorf, attributed to 
this genus. 
| Xenotheca, gen. nov. Dvzagnosis. Dichotomously branched 
somewhat slender axes, the finer branches each terminated by 
a large cupule-like organ, cup-shaped, and ending in several 
teeth. 
: Xenotheca devonica, sp. nov. Diagnosis. Axis dichotomising 
at least three times, 5—1 mm. broad, the branches between the 
dichotomies or the cupules varying from 5 mm. to 3° cm. in 
length. Cupules, cuplike in form, 8 to 15 mm. or more in length, 
and 4 to 10 mm. in breadth, with, ‘distally, usually eight lanceolate 
| _ teeth, 2 to 4mm. in length. 
Telangium sp. 
Plate IV, figs. 8, 9. 
: Two examples of isolated fructifications occur, which consist of 
_ tufts of sporangia.united at the base and mounted on a common 
stalk. One of the specimens is figured, somewhat enlarged, on 
Plate IV, fig. 9 and shows several groups of sporangia. The other, 
fig. 8, shows a single tuft of six or more members, natural size. 
The sporangia are about 2 mm. in length, and in most cases there 
appear to be more than six in the tuft. They are free for the 
greater part of their length, but it is impossible to say whether 
they are united together at the base as a synangium, or are 
each inserted independently on the common stalk. 
These specimens, although specifically distinct, have a close 
resemblance to the Lower Carboniferous Sphenopteris (Telangium) 
aginis L. and H.t{ and S. (7.) bifida L. and H.§ 
Knorria sp. 
Text-fig. 3. 
Several good examples of Knorria-casts were obtained by 
Townsend Hall from Sloly quarry, one of which is shown in 
text-fig. 8. These specimens are in the Atheneum Museum, 
Barnstaple. There are also others in Lt.-Col. Harding’s collection 
at Jermyn Street, and in the Valpy Collection in the British 
Museum (Nat. Hist.). The last mentioned are from the Marwood 
* Dawson, Foss. Plants Dev. and Upper Silur. Canada, Part 1, p. 39, pl. x. 
fig. 121, pl. x11. especially fig. 140, 1871. 
+ Feistmantel, Zeitschr. Deut. Geol. Gesell. Vol. xxv. 1873, p. 541, pl. xv. 
figs. 39, 40. 
+ Peach, Quart. Journ. Geol. Soc. Vol. 34, pl. vir. figs. 1—3, 1878. 
§ Kidston, Trans. Roy. Soc. Edinb. Vol. 33, pt. 1, 1887, pl. vii. figs. 1—6a. 
