COLLECTED IN ESKDALE AND LIDDESDALE. 533 
tion, owing to the imperfect manner in which their remains occur, and the 
entire absence of fruit. 
I have placed this and the following species in Chondrites, Stern., but it 
appears to me that they might have been placed with equal propriety in 
Fucoides, Brongn. 
Position and Locality.—Frequent, but mostly in a fragmentary condition, 
in the Cement-stone group of the Calciferous Sandstone series, Glencartholm, 
Eskdale. 
Chondrites simplex, sp. nov., Kidston. 
Plate XXXI. fig. 14. 
Description.—F¥rond filamentous, simple. 
Remarks.—This Alga appears to have consisted of separate simple fila- 
ments, from a thirtieth to the tenth of an inch broad, reminding one of the 
recent genus Chorda, and probably growing in the same tufted manner. 
The greater number of the component filaments appear in this specimen 
to lie in a somewhat confused mass. It is probable that each of the parts was 
separate when growing, but have assumed the tangled appearance subsequently. 
In the larger filaments, neither apex nor base is shown, so an estimate can- 
not be formed as to the length of the perfect fronds. 
Only one specimen of this Alga has been obtained. 
Position and Locality.—From the Cement-stone group of the Calciferous 
Sandstones, Glencartholm, Eskdale. 
Crossochorda, Schimper. 
Crossopodia, MacCoy. 
Crossochorda carbonaria, sp. nov., Kidston. 
Plate XXX. fig. 4. 
_ Character.—Frond pinnate, segments filamentous, springing laterally from 
the central axis, from which they bend gently outwards and upwards. 
Remarks.—This Alga was also probably of considerable length, though the 
most perfect individual is only two inches long. 
In their width the fronds vary considerably, some being fully half an inch, 
others only the tenth of an inch broad. 
The main axis appears as a furrow running down the centre of the frond, 
from the sides of which the ultimate segments spring, and in their upward bend- 
ing become somewhat adpressed, giving a plumose appearance to the plant. 
The only other species with which this fossil is likely to be mistaken are 
Crossochorda (Crossopodia) Scotica, MacCoy, and Cruziana semiplicata, Salter.* 
* Mem. of Geo. Survey, vol. iii. p. 291. 
