PLATE. LXXIV. 



PAGE 



Figs. 1-6. Farrea soUasii, F. E. S., . . , 286 



Fig. 1. Spicules of a dry specimen in the natural situation of a transverse section 

 of the tube-wall ; x 100 



Fig. 2. Uncinatum with numerous spines ; x 300. 



Fig. 3. Dermal clavula with hemispherical umbel of the head ; x 450. 



Figs. 4, 5. Gastral clavulae with anchor teeth of various length ; x 450. 



Fig. 6. Discohexaster with slender terminal rays ; x 450. 



Figs. 7-13. Farrea vosmaeri, F. E. S., . . . 286 



Fig. 7. Spicules of a dry specimen, in their natural situation, of a transverse section 

 of the tube-wall ; x 100. 



Fig. 8. Oxyhexaster with long, strong, principal, and small, divergent, terminal 

 rays ; x 450. 



Fig. 9. Discohexaster with long, strong, principal, and small, S-shaped, terminal 

 rays, in perianth-like arrangement ; x 450. 



Fig. ] 0. Dermal clavula with flatly bent surface of the umbel of the head ; x 450. 



Fig. 11. Uncinatum with short spines ; x 300. 



Fig. 12. Gastral clavula with very long spines ; x 450. 



Fig. 13. Gastral clavula with flatly bent umbel, with somewhat long teeth ; 

 x450. 



