446 ALGÆ OF TASMANIA. 
upper part of the frond, the segments overlap each other 
above the axils, leaving wide circular spaces like holes in a 
net. The apices are all acute; the ultimate ramuli even 
subulate, from which cireumstance, added to the colour, the 
position of the fruit, and the internal structure of the frond, 
I am induced to place this plant in the restricted genus 
Spherococcus (Grev.) rather than in Rhodomenia, although 
there is no trace of midrib. The internal structure to which 
I allude consists in a number of large intercellular spaces of a 
roundish figure that exist throughout the substance of the 
frond, and give a transverse section of it a honey-combed 
appearance ; while under a pocket lens they impart a netted 
character to the surface of the frond. These air-cells sepa- 
rate the two opposite surfaces so considerably, that we must 
eall the frond rather very much compressed, than truly flat. 
The coccidia are borne only on the ultimate divisions, and 
generally at or near the apices; at first they are conical, 
they afterwards become more globose, and finally are tuber- 
culated and very irregular in form. They are of a fleshy 
substance, and contain a favella, or mass of sporules divided 
into a great number of lesser clusters. "The colour is exactly 
that of S. coronopifolius, and the habit is not dissimilar. 
The substance is thinner, yet it scarcely adheres to paper.— 
I had at first thought that this plant, which appears to be 
common in V. D. L., might be Rhodomenia alcicornis, J. Ag» 
but on reading over his description carefully, I cannot sup- 
pose them the same. The position of the fruit affords an 
obvious difference. diis 
Tribe 4. DELESSERIES, J. Ag. 
27. Nitophyllum punctatum, Grey. (Fucus punctatus, Turm. - 
t. 71.) 7 
George Town, V. D. L., R. Gunn, Esq., n. 1270 (with — 
capsules), and n. 1269, 1271 (with granular fruit). 
28. Nitophyllum, z. sp. ? 1o X 
George Town, V. D. L., R. Gunn, Esq., n. 1273 and 1276? 
— The specimens are without fruit, and therefore I do nof 
