138 THE PLUMULARIDJi. 



PLATE VII. 



FKI. 1. Plumularia goodei Nutting. Part of stem, showing nodes and origin of hydrocladia (enlarged). 



2. Plumularia goodei. A single hydrocladium (greatly enlarged). 



3. Plumularia goodei. A hydrocladial interuode (still more enlarged). 

 I. Plumularia goodcl. Mesial nematophnre (greatly magnified). 



5. rlumiilaria rirginia: Nutting. Part of hydrocladium (enlarged). 



6. I'lumnlaria viryinw. Single internode (greatly enlarged). 



7. Plumularia rirginia. Hydranth (greatly enlarged). 



8. Plumularia rirginiae. Front of stem, showing internodes and origin of hydrocladia (enlarged). 



9. Plumularia rirginia: Nematophore, showing sareostylu (highly magnified). 

 10. Plumularia Virginia, f-onangia (enlarged). 



PLATE VIII. 



FIG. 1. Plumularia macrotheca Altaian. Part of hydrocladium (greatly enlarged). (After Allmau.) 



2. Plumulariu profunda Nutting. Part of hydrocladium (greatly enlarged). 



3. Plumularia prof undo. Part of hydroeladiiini, bearing gonangia (greatly enlarged). 



4. Plumularia dendritica Nutting. Part of hydrocladium (enlarged). 



5. Plumularia dendritica. Side view of hydrotheca (greatly enlarged). 



6. Plumularia dendritica. Front view of hydrotheea (greatly enlarged). 



7. Plumularia paucinoda Nutting. Part of stem (enlarged). 



8. Plumularia paneinoda. Part of hydrocladium (enlarged). 



9. Plumulariu paudnoda. Part of hydrocladium (greatly enlarged). 



PLATE IX. 



Fid. 1. Antennularia antennina LinnaMis. Part of stem and bases of hydrocladia (enlarged). 



2. Antennularia aiitenitina. Part of hydrocladium (greatly enlarged). 



3. Antennularia americana Nutting. Part of stem and hydrocladia (enlarged). 



4. Antennularia americana. Part of hydrocladium (greatly enlarged). 



5. Antennulariii simpler Allman (enlarged). (After Allman.) 



PLATE X. 



Fie. 1. Antennularia rugosa Nutting. Part of stem with bydrocladia (enlarged). 



2. Antennularia rugosa. Hydrocladium, showing thickening of perisarr at base (greatly enlarged) 



3. Antennularia geniculata Nutting. Portion of stem -with bases of hydrocladia (enlarged). 



4. Antennularia geniculata. Part of hydrocladium (greatly enlarged). 



5. Antennularia piunata Nutting. Part of stem with hydrocladia (enlarged). 



6. Antennularia pinnata. Part of hydrocladium (greatly enlarged). 



PLATE XI. 



FIG. 1. Monotheca margaretta Nutting. Entire colony, except the hydrocaulus (enlarged). 



2. Monotlieca margaretta. Side view of hydrotheca (greatly enlarged). 



3. Monotheca margaretta. Back view of hydrotheca (greatly enlarged). 



4. Antennopxis hippurix Allmau. Part of stem with hydrocladia (enlarged). (After Allman.) 



5. Antt-nnopxix liipptirin. Part of hydrocladium (greatly enlarged). (After Allmau.) 



6. A-ntennopsis hlppuris. Gonaugia (enlarged). (After Allman.) 



PLATE XII. 



FIG. 1. Antennopxix distans Nutting. Part of stem with hydrocladia (enlarged). 



2. Antennopxix distans. Part of hydrocladium (greatly enlarged). 



3. Antennopsit longicorna Nutting. Part of stem with hydrocladia (enlarged). 



4. Antennopxis longiconia. Part of hydrocladium (greatly enlarged). 



5. Antennopxis uigra Nutting. Part of stem with hydrocladia (enlarged). 



6. Antennopxix nigra. Part of hydrocladium (greatly enlarged). 



7. Aniennopxis aunulata (Allmau). Part of stem with hjdrocladia and gonaugia (enlarged). 



8. Antennopsis annulata. Part of hydrocladium (greatly enlarged). 



9. Anlennopsis annulata. Part of hydrocladium (still more enlarged). 



PLATE XIII. 



FIG. 1. MonostcFchas tjuadridens (MeCrady). Part of colony dichotomously branching (enlarged). (After Allman.) 



2. Monoxtcechaa i/uadridrn*. Part of hydrocladium, showing hydrothecn< and gouangia (greatly enlarged). 



(After Allman.) 



3. Monostiechax ijuatlridrm. Hydrocladium of form having closely approximated hydrothec:n (greatly enlarged). 



4. Monostcechas (inadridenx. Single liydmtheca of the same fgreatly enlarged). 



5. Autrnnella yracilis Allman. Portion of hydrocladium (greatly enlarged). (After Allmuu.) 



