SpyridiaJ] 
IX. ALGA!. 
707 
masses of spores, each mass enclosed in a distinct membrane. Tetraspores 
sessile, naked on the articulated setae. 
A small genus, found in Loth temperate, but chiefly in tropical seas. 
1. S. epposita, Harv. in FI. N. Z.u. 256. Root a small disk. Frond 
dark red, rather rigid; stem 4-6 in. long, not evidently articulate, forked at 
the base, compressed, 4-angled ; angles prominent ; branches spreading, dis- 
tichously pinnate ; pinnae unequal, transparently articulate ; joints short,’ as 
long as broad ; pinnules few, short, pectinate, with capillary distichous or 
decussating ultimate branchlets. Conceptaeles imperfectly 3-lobed, not in- 
volucrate. — Harv. Phyc. Austr. iii. t. 158. 
Chalky Bay, Lyall. (Australia, Tasmania.) 
91. CERAMIUM, Roth. 
Frond red, filiform, dichotomously branched, jointed; joints opaque, of a 
single cell, the nodes coated with a stratum of minute coloured cells, which 
sometimes extend over the whole internode. Spore-masses globular, sessile, 
with a pellucid limb containing angular spores, subtended by shortened 
(involucral) branchlets. Tetraspores external or immersed. 
Annual small Algce, beautiful when laid out on paper, abundant in all oceans. 
§ 1. Frond unarmed , coated at the articulations only with a zone of minute cells. 
1. O. diapfoamim, Roth; — FI. N. Z. ii. 256. Frond 2-4 in. long, 
subsetaceous, dichotomously and sublaterally branched ; branches erecto- 
patent, terminal erect with converging tips ; lower articulations 3-4 times 
longer than broad, interstices pellucid. Spore-masses lateral on the branches, 
with few short involucral branchlets. Tetraspores whorled round the nodes 
in a single series.— Harv. Phyc. Brit. t. 193 ; J. Ag. Sp. Alg. ii. 125. 
Probably abundant. Port Cooper, Akaroa and Otago, Lyall. Lord Auckland's group, 
J. L. H. (Atlantic and Southern Oceans.) 
2. G. virgatnim, TIooic. f. and Harv. FI. N. Z. ii. 256. Frond erect, 
straight, sparingly branched ; branches strict, virgate, simple or again 
branched ; branches dichotomously multifid, appressed ; tips incurved ; axils 
very narrow ; articulations of the branches as long as broad, of the branch- 
lets very short. Spore-masses subterminal; involucre of many branchlets. — 
J. Ag. Sp. Alg. ii. 137. 
East coast, parasitical on Carpophyllum, Colenso. 
§ 2. Frond unarmed ; internodes more or less completely coated with small cells. 
3. G. rubrum, ArjardU ; — FI. N. Z. ii. 256. Frond 2-12 in. long, ro- 
bust, very variable in form and ramification, irregularly dichotomous ; branch- 
lets hooked inwards ; lower articulations twice as long as broad, upper 
shorter than broad. Spore-masses globose, with 3-4 involucral branchlets 'or 
lateral branchlets. Tetraspores whorled in the articulations. — J. Ag. Sp. 
Alg. ii. 127 ; Harv. Phyc. Brit. i. 181. 
Abuudant throughout the islands, and in Lord Auckland's group and Campbell’s 
Island. (Common in all temperate seas.) 
