EXPLANATION TO PLATE XXXIV. 



. 1. Streptooaultu pulolierrimus AMrna.n. Entire i-ol.uiy. (After Allinan. i 

 2. Streptocauliis pulclirrrimu*. Part of hydrocladinm (enlarge.!). (After Allman.) 

 M. StreiitocaiiliiKpulcherrimnx. Front view of hydrc.theca' (enlarged). (After Allinan.) 

 I. Nnditlimi dalli (Clark). Branched hydrocladium (enlarged). 

 :>. Xnitilhtva dalli. Part of hydrocladinm (greatly enlarged). 

 li. .Vii</;/Ami ilalli. Part of hydrocladinm with gonangiuni (enlarged). 

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