PLATE LXXII. 



PAGE 



Farrea occa (Bowerbank), Carter, . . 277 



(Erroneously named Farrea haeckelii, F. E. S., on the Plate.) 



Fig. 1. Dry skeleton of Farrea occa, from a photograph ; natural size. 



Fig. 2. Basal portion of a small specimen, showing the aperture of an excurrent 

 canal ; natural size. 



Fig. 3. Outer terminal view of the bifurcation of a tube ; x 2. 



Fig. 4. Fragment of a specimen with very elongated (extended) tubes ; natural 

 size. 



Fig. 5. Outer view of the dermal side of the wall (combination figure) ; x 100. 



Fig. 6. Uncinatum with more spines than in that figured in PI. LXXI. fig. 4. 



Figs. 7, 8, 10. Dermal clavulse with lemon-shaped or globular heads, varying 

 from crowned ones with a toothed margin to smooth ones ; x 450. 



Figs. 9, 11, 12. Gastral clavulse, anchor-like, with long teeth, or with a hemi- 

 spherically arched head and much shorter teeth ; x 450. 



