GIO REPORT OP COMMISSIONER OF FISH AND FISHERIES. [lOHJ 



Plate IV. 



Fig. 8. Pennatula (Ptilella) horealis. Side view of a rather Bmail specimen, one-half 

 natural size. 



Fig. 8 a. The same. Side view of a part of the rachis and pinnae, enlarged two diam- 

 eters; a, the pinnae with full-sized sexual polyps; a', rudimentary pinnae 

 at the base of the rachis ; h, the lateral groups of the rudimentary or 

 asexual zooids ; b', clusters of similar zooids on the basal part of the 

 pinnae ; i", the larger asexual zooids along the ventral surface of the ra- 

 chis ; e, the naked area at the base of the pinnae ; e', ee", the naked sur- 

 faces on the upper and lower surfaces of the pinnae near the base ; v, the 

 naked longitudinal area on the ventral side of the rachis ; P, the basal 

 bulb; P', the enlarged swelling at the upper end of the bulb. 



J 



