62 DESCRIPTIOISr OF THE PLATES. 



PLATE XX I V. 



Figs. 1-4. Aglaopbenia lophocarpa. 

 Fig. 1. Natural size. 



Fig. 2. Portion of pinna, magnified ; lateral view. 

 Fig. 3. Portion of stem with pinn^, magnified ; front view. 

 Fig. 4. Corbula, magnified. 



Figs. 5-9. Aglaopbenia apocarpa. 



Fig. 5. Natural size. 



Fig. 6. Portion of a pinna, magnified ; lateral view. 



Fig. 7. Portion of stem with pinnae, magnified ; front view. 



Fig. 8. Corbula, magnified. 



Fig. 9. Part of a' leaflet of a corbula showing the lateral nematophores ; still further magnified. 



PLATE XXV. 



Figs. 1-4. Aglaopbenia gracilis. 

 Fig. 1. Natural size. 



Fig. 2. Portion of a pinna, magnified ; lateral view. 

 Fig. 3. Same, front view. 

 Fig. 4. Portion of stem with pinna, magnified ; oblique view of pinna. 



Figs. 5 -9. Aglaopbenia rigida. 



Fig. 5. Entire colony, natural size. 



Fig. 6. Portion of pinna, magnified ; lateral view. 



Fig. 7. Same, front view. 



Fig. 8. Corbula, magnified. 



Fig. 9. Part of one of the ridges of the corbula, still further magnified. 



PLATE XXVI. 



Figs. 1-8. Aglaopbenia distans. 



Fig. 1. Entire colony, natural size. 



Fig. 2. A portion, magnified. 



Fig. 3. Portion of the hydrotlieca, still further enlarged to show the anterior tooth-like process. 



Fig. 4. A hydrotheca differing somewhat in form from the normal hydrothecae, but associated with these 



in the same colony ; magnified. 

 Fig. 5. Orifice of hydrotheca viewed from above. 



Fig. 6. Portion of a pinna with two hydrotheca; viewed in front ; magnified. 

 Fig. 7. Corbula, magnified. 

 Fig. 8. One of the leaflets of a corbula, still further magnified. 



(a) Peduncle of leaflet. 



(b) Supracahcine nematophores but slightly altered. 



(c) Mesial nematophore greatly enlarged and altered in form. The slightly altered hydrotheca 



is seen included between the supracalycine and mesial nematophores. 



Figs. 9, 10. Aglaopbenia sigma. 

 Fig. 9. Natural size. 

 Fig. 10. Portion of a pinna, magnified. 



PLATE XXVII. 



Figs. 1-3. Aglaopbenia bispinosa. 



Fig. 1. An entire colony, natural size; front view. 



Fig. 2. The same, lateral view. 



Fig. 3. Distal portion of the stem, magnified. 



