EXPLANATION To I'LATK XXIX. 



FK;. 1. Diplifiain cnrnimlnlii (Murray). Part of colony ( rnlar_'c<l) . I After Murray.) 



'2. Ili/ilinaiii fn/lii, i- (J.iliiisldii). Part of colony, .sln>win<_' linuirliiiii: (cnlarircil). 



H. l>i/iliiixln fn/ld. i . Fronl view of branch (I'nlarired ). 



4. Diphasia fallaa: Part of liranch with gonangium (cnlarL'i''l |. 



5. I>!J>IHIK!II I'lilliu . Pair of hydrothecse (greatly enlarged). 



6. l><i,lt<i>sii< fiiHu.i: End of hydrotheca, showing bperculum (L'lvatly mlaiLM'il). 



264 



