EXPLANATION OF PLATE VIII. 



EUNICEA TOURNEFORTI. ME. 



Fk;. I. Portion of branch enlarged: a, a, exserted calicles; b, b, b, expanded 

 poljps; c, c, side view of calicles. 



Fig. 2. Profile vieiv of sintj^le calicle with expanded folyp : a, major lobe of cal- 

 icle; b, polvp. 



Fig. 3. Vieiv of oral surface of polyp xvith jlexed tentacles. 



Fig. 4. View of oral surface of young polyp. 



Fig. 5. Profile viezv of tentacle : a, tentacle; b, tenlaciilai" papilJEe. 



Fig. 6. Tran<^verse section of branchy magnified : a, axis cylinder; b, edges of 

 superimposed lamella;; c, c, c, primary water- vascular canals; d, d, d, 

 endodermSI lining of water-vascular canals; e, e, e, ectoderm; f, gul- 

 let of polyp; g, g, mesenterial filaments; h, h, h, h, retractor muscles; 

 i, i, mesenteries and retractors; j, j, j, spaces left by spicules which 

 have been dissolved out; k, k, k, secondary water-vascular canals; 

 1, tentacle of polyp. 



Fig. 7. Longitudinal section of calicle and polyp to shorv curvature: a, a, ten- 

 tacles; b, gullet; c, c, c, mesenteri<;s and retractor muscles; d, d, mes- 

 enterial filaments; e, e, endodermal lining of calicle; f, f, epidermis; 

 g, g, spaces occupied by spicules. 



Fig. 8. Transverse section of polyp through gullet : a, a, a, body wall ; b, b, b, b, 

 retractor muscles; c, c, c, c, mesenteries; d, d, mesodermal portion of 

 gullet wall; e, ectodermal lining of gullet. 



I'"i(;. 9. Termination of a.\is cylinder : a, terminal calicle; b, terminal polyp; 

 c, mesenterial filaments; d, terminal boss of axis; e, ring below boss; 

 f, ridges forming flutings around axis, in which the interior part of 

 primary canals fit. 



