plants from the Devonian rocks 103 
of the British Lower Carboniferous rocks elsewhere, nor indeed is 
this the case. 
___ Of the two species described here, one is a new type and the 
_ other is a plant only known from the Devonian. The other genera 
recorded and the particular types themselves are similar to those 
occurring in the Lower Carboniferous. On the other hand there 
is no plant represented which is particularly characteristic of the 
Lower Carboniferous. We therefore conclude that on the whole 
| this flora is probably of Devonian age, or at least that there is no 
evidence to be gained from the specimens described here which is 
7 contrary to this view. 
EXPLANATION OF PLATES. 
Puate IV. 
Fig. 1. Xenotheca devonica gen. et spec. nov. Two thecae terminating 
) a dichotomous axis. These thec bear large scars. From Croyde Hoe, 
Baggy Point, N. Devon. Baggy Beds. No. 103, Brit. Devonian Plant 
Coll. Sedg. Mus. Camb. x3. 
Fig. 2. Xenotheca devonica, the same specimen as fig. 1.. Nat. size. 
Fig. 3. Xenotheca devonica? Probably a badly preserved theca. From the 
same locality and No. 91 in the same collection. x3. 
Fig. 4. Scars on the thecz seen in figs. 1 and 3, enlarged. x8. 
Fig. 5. Xenotheca devonica. A theca. From the same locality and No. 92 
in the same collection. Nat. size. 
Fig. 6. Xenotheca devonica. A well preserved theca. From the same 
locality and No. 96 in the same collection. x 3. 
Fig. 7. Xenotheca devonica. A theca in which the teeth are well preserved. 
From the same locality and No. 106 in the same collection. x 3. 
Fig. 8. Telangium sp. A tuft of sporangia. From the same locality and 
No. 129 in the same collection. Nat. size. 
Fig. 9. Telangium sp. Tufts of sporangia. From the same locality and 
No. 122 in the same collection. x 3. 
Fig. 10. Xenotheca devonica. A habit specimen showing the dichotomous 
branches ending in badly preserved thece. From the same locality and 
No. 106 in the same collection. Nat. size. 
Fig. 11. Xenotheca devonica, the same specimen as fig. 7. Nat. size. 
Fig. 12. Sphenopteridium rigidum (Ludw.). Fragment of a pinnule showing 
traces of the nervation, From the same locality and No. 116 in the same 
collection. x 3. 
8—2 
