12 ANTONY GEPP AND ETHEL S. GEPP. 



James Taylor. These are in the British Museum, and are small (about 10 cm. long). 

 They appear to be the same species, but are stouter in texture. Lyall's specimens, of 

 which there are fine examples in the British Museum and in the Kew herbarium, 

 measure 30-40 cm. and bear the MS. note " a small specimen." They were collected 

 in Northumberland Sound, Queen's Channel (76 5' N. lat., 97 W. long.) on July 14, 

 1853, during Belcher's Expedition. 



The distribution of the species is notable. It occurs only in the extreme north 

 (76 N. lat.) and in the extreme south (72 S. lat.). 



10. PLOCAMIUM COCCINEUM. 



Plocamium coccineum Lyngb., Tent. Hydroph. Uanic. 1819, p. 3'.), t. 9 



Off Cape Wadsworth, Coulman Island, with cystocarps. 



Geogr. Distr. Mediterranean, N. and S. Atlantic, N. Pacific, Cape of Good Hope, 

 Australia, Tasmania. 



11. DELESSERIA QUERCIFOLIA. 



Delesseria quercifolia Bory, Voyage Coquille, 1828, p. 18C, t. 18, fig. 1. 

 Off Cape Wadsworth, Coulman Island. 



Geogr. Distr. North Pacific, Falklands, Cape Horn, Kerguelen. 

 Sterile and somewhat battered specimens. 



12. PHYLLOPHORA ANTARCTICA. 



(Plate IV., figs. 21 and 22.) 

 Phijllophora antarctifa Gepp, Journal of Botany, 11)05, p. 109. 



Off Cape Wadsworth, Coulman Island. 



Frons e stipite brevi mox in laminam membranaceam ligulatam ssepius opposito- 

 siuuatam simplicem vel dichotomam expausa, ramis aprjroximatis sinu angustissimo et 

 ad apicem et secundum margines prolificantibus ; cystocarpiis marginalibus pedicellatis ; 

 tetrasporangia ignota (figs. 21, 22). 



This species is represented in the collection by several specimens, both fertile and 

 sterile, mostly fragmentary, and exhibiting considerable variability of external form 

 (fig. 2lb). The longest specimen (fig. 21a), though incomplete, is about 17 cm. high 

 and about 1 cm. broad, with a single dichotomy. The smallest complete specimen is 

 5 cm. long and unbranched. The lamina is membranaceous and ligulate, slightly 

 undulate at the margin, with shallow constrictions at intervals of about 2 cm. ; where 

 a dichotomy occurs the branches are very close together, almost touching. The pro- 

 liferations along the margin are often numerous, and are usually quite small, whilst 

 those at the apex are sometimes as large as the primary frond ; and where three or 

 four occur together, they give the plant a digitate appearance. In transverse section 

 the thallus is seen to be composed of two strata. Within are two to three rows of lax, 

 empty, polygonal, very thick-walled medullary cells, surrounded by a cortex of two to 

 three rows of minute flattened coloured cells (fig. 22). The cystocarps are marginal, 



