EXPLANATION OF PLATES 



PLATE 1 



Fig. îa. Catenicella frigida sp. nov. x 25. From N° 617. 

 ib. do do Latéral surface, X 25. 



Ic - ào do Magnified about three times. 



l d- do do X 8. Showing a zoœcium attached by a chitinous tube 



to the older zoœcium. From N°Ô23. 

 2a. Brcttia longa sp. nov. Anterior surface. X 25. From N° 621. 

 2b. do do Posterior surface. X 25. From N° Ô23. 



3a. Bugula reticulata Busk, var. spinosa, nov. X 25. From N° 610. 



36. do do do Upper portion of the same zoarium as Fig. 3a. 



(v) vermiform body, (bb) brown bod)^, (rp) 

 rosette plates seen through the front wall. 

 X 25. 

 3c. do do Avicularium. y §5. 



3d. do do Dorsal surface showing radicle originating at a bifurcation, also 



small radicular chambers (a), from which however radicles are 

 seldom found growing. X 25. From N° 610. 

 Bugula biconvis Busk. Showing latéral branches with short zoœcia also pair of ver- 

 miform bodies (v). X 25. From N° 608. 

 Dorsal surface, showing branch starting by the side of the 



long zoœcium. (r) rosette plate. X 25. From N° 608. 

 Mandible X 85. 

 Transverse sections of a short vermiform body. X 5oo. 



From N° 608. 

 Vermiform body with parenchym by the side. X 7^0. 

 Longitudinal section of the walls of the same. X 75o. 

 Large round avicularium seen from the front. X iS 5. 

 The same seen laterally. X 85. 



Section of avicularium. X 85. (pb) « peculiar body ». X 25o. 

 5a. Scrupocellaria antavdica sp. nov. X 25. From N° 347. 

 5b, c, d. do do Mandibles (b) of latéral avicularium, (c) of médian 



avicularium. X 85. (d) ib. X 25o. 

 5e do do Ovicell. X 5o. 



6a. Bicellaria grandis Busk. Anterior surface, X 2 5. From N° 1068. 

 6b. do do Dorsal surface, showing radicles. X 25. 



xiv R 21 



