12 AUSTRALASIAN ANTARCTIC EXPEDITION. 



Structure. — The interior stratum of the frond consists of cylindrical and many- 

 angled cells, the angles produced into threads which anastomose with those of neigh- 

 bouring cells, and form a loose network, looser in the centre. A sub-external stratum 

 consists of angular cells grouped in series parallel to the surface of the frond and 

 anastomosing with cells of the small and of adjacent series. The external stratum is 

 formed of small rounded cells arranged in dichotomous-fastigiate series perpendicular 

 to the surface, the cells held together in quasi filaments by a firm mucus. 



Colour reddish-purple. No cystocarps or tetrasporangia observed. 



(Plate 5. Plate 9, fig. 3). 



Tylocarpe^ Kuetzing. 



Phyllophora Greville. 



Phyllophora antarctica A. and E. S. Gepp. 



Many examples of this species were dredged at a depth of 45-50 fathoms in 

 Commonwealth Bay. Some were growing on worm tubes and sponges, but most 

 had been detached by the dredge. They were of the form and structure of the plants 

 described by A. and E. S. Gepp, National Antarctic Expedition, 1901-1904, Marine 

 Algse, p. 12, PI. IV, fig. 21, 22. Our largest specimen measured about 9 cm. in length. 

 I could not find fruits of either kind. 



Distribution.— Hitherto only recorded from off Cape Wadsworth, Coulmein I., 

 Victoria Land. 



Callymenie.e (J. Ag. ) Schmitz. 



Callymenia J. Agardh. 



Callymenia antarctica Hariot. 



This alga was described by Hariot from a single specimen obtained by the First 

 French Antarctic Expedition, He Booth Wandel, dredged at 30 metres depth. 



His description is " Frondes numerosse lapidibus ima basi adfixse, csespitem 

 emulantes, alias vix evolutae, alterse ad 20 cm. altse, longe cuneatae et late deltoideae, 

 margine integral, apice sat profunde fere ad medium plurieslaciniato divisse. Fructus 

 ignoti. Facies Rhodymenise, structura Callymeniae." 



Dr. L. Gain records also a single specimen, not well preserved, which was gathered 

 in a dredging at 30 metres in the Peltier Channel, near He Wiencke, by the " Pourquoi 

 Pas?" 



It is with some hesitation that I ascribe to this species a Callymenia dredged 

 by the Mawson Expedition at 60 fathoms in lat. 65° 42' S., long. 92° 10' E. Several 



