64 DESCRIPTIOX OF THE PLATES. 



Fig. 3. Proximal end of a pinna carrying a phylactogonium ; magnified. 



(a) Pinna. 



(b) Phylactogonium with gonangia ; female (?) ; front view. 



Fig. 4. Portion of a phylactogonium from a point near its distal end, carrying a single young gonangium ; 



female (?) ; back view. 

 Fig. 5. Portion of a pinna with a phylactogonium, magnified. 



(a) Pinna. 



(b) Phylactogonium with gonangia ; male (?). 



Fig. 6. Portion of one of the branches of a phylactogonium with two of its nematophores ; still further 

 magnified. 



PLATE XXXIV. 



Figs. 1-5. Halicornaria speciosa. 

 Fig. 1. Natural size. 



Fig. 2. A portion taken from a point towards the proximal end ; magnified. 

 Fig. 3. Same, from a point near the distal end. 

 Fig. 4. Portion of a pinna, still further magnified ; front view. 

 Fig. 5. Same, lateral view. 



