NUM. 
MISS E. 8. BARTON ON NOTHEIA ANOMALA. 425 
Finally, I would express my gratitude to the officials of the 
Botanical Department of the British Museum for their never- 
failing kindness and interest. 
EXPLANATION OF THE PLATES, 
Pate 12. 
Fig. 1. Notheia anomala, Hary. et Bail., growing on Hormosira. Nat. size. 
2a, General view of thallus. Long. sect. x 60. 
2b. Longit. section of mature thallus, showing part of central strand 
and intermediate layer. x 140. 
38. Transverse section of mature thallus. x 60. 
3, Cells from centre of same. x 365. 
5. Cryptostoma still more advanced. x 365. 
Prate 13. 
Fig. 4. Oryptostoma rather older. x 365. 
6. Very early stage of young branch arising from the base of a crypto- 
stoma, X 365. 
7. Branch more advanced. x 365. 
8. Mature conceptacle, with oogonia and antheridia, x 140. 
9. Antheridium. x 365. 
10. Oogonium. x 365. 
ll. Penetrating filaments of Notheia pushing up cuticle of Hormosira 
and forming cushion. x 365. 
13. Various stages of young plant. x 25. 
a. Hairs arising from cushion of Nofkeid inside host-plant. 
b. Young shoot which has reached the surface of the host. 
c. Still later stage. 
The light-coloured tissue surrounding the young shoot of Notheia 
is disorganized host-tissue. 
Puate 14. 
Fig. 12. Young shoot of Notheia issuing from host-plant. x 365 
14. Cells giving off rhizoids along the sides of the pseudo-cryptostoma. 
x 400. 
15. Junction of Hormosira and Notheia, Mature. x 65. 
16. Rhizoids of mature plant. x 400. 
