610 REPORT OF COMMISSIONER OF FISH AND FISHERIES. [108| 
Puate IV. 
Fia. 8. Pennatula (Ptilella) borealis. Side view of a rather small specimen, one-half 
natural size. 
Fia. 8a, The same. Side view of a part of the rachis and pinne, enlarged two diam- 
eters; a, the pinnz with full-sized sexual polyps; a’, rudimentary pinnz 
at the base of the rachis; b, the lateral groups of the rudimentary or 
asexual zodids; b’, clusters of similar zodids on the basal part of the 
pinne; 6”, the larger asexual zodids along the ventral surface of the ra- 
chis; e, the naked area at the base of the pinne; e’, ee’’, the naked sur- 
faces on the upper and lower surfaces of the pinnzw 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. 
