30 THE VOYAGE OF a M.S. CHALLENGER. 



CONFERVACE.E. 



Cladophora subvaricosa, n. sp. 



Cladophora subvaricosa, n. sp., Dickie in Journ. Linn. Soc. LoncL, xiv. p. 365. 



Filamentis passim varicosis, sparsissime ramosis, articulis diametro 3--8-plo longioribus. 



Fernando-Noronha. Moseley. 



In rock-pools, with Kallonema obscurum. 



Cladophora minuta, n. sp. 



Cladophora minuta, n. sp., Dickie in Journ. Linn. Soc. Lond., xiv. p. 365. 



Ramulis brevibus, alterne distributes, articulis omnibus diametro 10-plo longioribus. 



Platform Island. — In rock-pools, with the next — Moseley. 



A very small species 1 to 2 lines long; diameter = O'OOl inch. 



OSCILLATORIACE^E. 



Lyngbya noronhse, n. sp. 



Lyngbya noro7ihw, n. sp., Dickie in Journ. Linn. Soc. Lond., xiv. p. 365. 



Vaginis valde mucosis, subhirtis, confluentibus, trichomatibus curvulis luteolis, articulis 

 diametro 2-3-plo brevioribus. 



Platform Island. — In rock-pools — Moseley. 



Forming yellowish shrub-like masses, half an inch to an inch high ; entire diameter of 

 filaments = 0-0006 inch. 



It seems nearly allied to Lyngbya fulva, Harv. 



Palmellace^e. 



Hormospora pellucida, 11. sp. 



Hormospora pellucida, n. sp., Dickie in Journ. Linn. Soc. Lond., xiv. p. 365. 



Tubulis simplicibus, mucosis, pellucidis, asqualibus ; cellulis ellipticis, diametro 2-plo 

 longioribus, in seriem moniliformem transverse dispositis. 



Fernando-Noronha. Moseley. 



A very delicate species ; entire diameter of the filaments = - 006 inch. 



In rock-pools, mixed with Cladophora, &c, above described. 



