EXPLANATION TO PLATE XXX. 



Km. I. Di/iliiixin Irn/iii-ii Nutting. Part nf colony (enlarged) . 



'2. Diphasia digitalis (Busk). Front view of branch (enlarged). 



:!. Jjijiliiixin ilii/iliilix. Side view of lirunrh ( enlarged ). 



1. r>ijili<ix!ii tlii/itiilix. Part of .Vllinaii's type of Desmoscyphus acanthocarpus Allnian (mlanied). 



5. Di/i/inxiii ilii/ilii/ix. Distal c'lids of t\vo hydrothecse, chowinj; the h 1-likc operculum (iireatly ( j nlariri'i.l). 



li. Dijilutxin ilii/itdlix. Singh.-, livilrothft-a, showing what appear to be opercular niuscley (greatly 



7. Dijiliiixin ,liijitn/ix. Gonangiuni (enlarged). 



268 



