PLATE LXXIII. 



PAGE 



Farrea occa (Bowerbank), Carter, . . .277 



(Erroneously named Farrea haeckelii on the Plate.) 



Fig. 1. Gastral view of the inner side of the tube- wall (combination figure) ; 

 xlOO. 



Fig. 2. Transverse section of the tube-wall of the inferior part of an old specimen 

 (combination figure) ; x 100. 



Fig. 3. Uncinatum with very few spines ; x 300. 



Fig. 4, Simple oxyhexact ; x 300. 



Fig. 5. Exterior part of an uncinatum ; x 1000. 



