EXPLANATION To I'LATK XXVHI. 



Fn;. 1. Dictyocladium flabellum Nutlinj.'. l':irt <if culimy \\itli jionanjiia (enlarged). 



L'. Diclyocladium flubellum, 1'arl nf lirancli (fiilarjii'd |. 



'.',. Dictyocladiumfabettum. End uf hydmtlicca, ^Imuiiii: tci-th and ripcreiihiin ( ciilanjcd). 



4. IHfilius'iii fiixiin-ii (IJiiiia-us). Hranc'li with female gonangium (rnlarLvdl . 



"i. I>i/>h<i>;i<i 1-iixnrrii. Side view of lirancli \\ith <;niuinL,'inm (enlarged), 



(i. Diphania famnrisca (LiniiM'usi. Two pairs of hydrothecse i ndartrcd ). (After Ilincks.) 



7. HI/I/IIIXKI tamarisca. 1'nrtimi nf c'dlmiy with trmuintria (i-nlarged). (After Ilincks.) 



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