EXPLANATION OF PLATES. 



Unless otherwise indicated , all of the figures were drawn by Mrs. Lilian Hulsebus Crone after camera lucida sketches 

 by the author. Where figures were copied from other works their source is indicated. 



Plate 1. 



Fig. 1. Campanularia verticillata (Linnaeus). Portion of main stem and hydrothecae (enlarged). 



2. Campanularia verticillata. Hydrotheca (enlarged). 



3. Campanularia ■verticillata. Gonangium (enlarged). 



4. Campanularia voluhilis (Linnaeus). Two hydrothecee (enlarged). 



5. Campanularia voluhilis. Hydrotheca (greatly enlarged). 



6. Campanularia voluhilis. Hydrotheca (greatly enlarged). 



7. Gam.panularia integra Macgillivray. Hydrotheca and gonangium (enlarged). 



Plate 2. 



Fig. 1. Campanularia spiralis Nutting. Hydrotheca and gonangium (enlarged). (Only about one half of the pedicel 

 is shown.) 



2. Campanularia ritteri Nutting. Part of colony (enlarged). 



3. Campanularia integra Macgillivray. Hydrotheca (drawn to same scale as figs. 1 and 2.) 



4. Campanularia ptyehocyaihu^ AUman. Part of colony (enlarged). (After AUman.) 



Plate 3. 



Fig. 1. Campanularia groenlandica Levinsen (from the type of "C. lineata" Nutting) (enlarged). 



2. Campanularia grmnlandica. Part of colony (enlarged). 



3. Campanularia hmcksii Alder, hydrotheca (enlarged). 



4. Campanularia hincksii. Hydrothecal margin (greatly enlarged). 



5. Campanularia hesperia Torrey. Hydrotheca (enlarged). (After Torrey.) 



6. Campanularia denticulata Clark. Hydrotheca (enlarged). 



7. Campanularia denticulata. Gonangium (enlarged). 



Plate 4. 



Fig. 1. Campanularia raridentata Alder. Hydrotheca (enlarged). (After Hincks.) 



2. Campanularia kincaidi Nutting. Typ« colony (enlarged). 



3. Campanularia kincaidi. Hydrotheca (greatly enlarged). 



4. Campanularia urceolata Clark. Part of colony of type of "C. reduplicata" Nutting (enlarged). 



5. Campanularia urceolata. Part of male colony (enlai-ged). 



6. Campanularia tincta Hincks. Hydro thecse (enlarged). 



7. Campanularia tincta. Hydrotheca (greatly enlarged). 



Plate 5. 



Fig. 1. Campanularia tulipifera Allman (enlarged). 



2. Campanularia subru/a Jaderholm. Part of branch (enlarged). 



3. Campanularia subrufa. Gonangium (enlarged). 



4. Campanularia macroscypha Allman. Hydrotheca (enlarged). (After Allman.) 



5. Campanularia Ixvis Hartlaub. Hydrothecse (enlarged). (After Hartlaub.) 



6. Campanularia Ixvis. Gonangium (enlarged). (After Hartlaub.) 



Plate 6. 



Fig. 1. Campanularia brevicaulis Nutting. Two hydrothecse (enlarged). 



2. Campanularia brevicaulis. Hydrotheca (greatly enlarged). 



3. Campanularia gigantea Hincks (enlarged). (After Hincks.) 



4. Campanularia obtusidens 3 iiderholm. Hydrothecee (enlarged) . (After Jaderholm.) 



5. Campanularia marginata Allman. Part of branch (enlarged). 



6. Campanularia marginata. Part of type-specimen of "C. insignis" Allman (enlarged). 



7. Campanularia marginata. Base of hydrotheca, showing pedicel (enlarged). 



