124 PROF. A. DENDY AND MR. E. HINDLE : ADDITIONS TO 



Fig. 14. Internal anatomy of the animal seen when opened up along the right ventral 

 inter-radius, (x 2.) 



a.c. = ambulacral ring-canal ; c. = cloaca ; c/. = gonad ; ff.d. = genital duct ; 

 i. = intestine ; ?>.= inter-radial ; /.m. = longitudinal muscle; OT. = uiadreporic 

 canal ; p. = Polian vesicle ; ^jA. = pharynx ; r. = radial ; r.^nes. = right mesen- 

 tery ; retm. = retractor muscle of the pharynx ; 7:t. = respiratory tree. 



Fig. lo. Phyllophorus dearmatus, sp. n. 

 Internal anatomy of the animal seen when opened up along the right lateral 

 inter-radius. (X If.) 



CB. = ffisophagus (Other lettering as in the preceding figure.) 



Plate 13. 

 Figs. 16-17. Rhabdornolyus novce-zealandice, sp. n. 



Fig. 16. Sketch of the internal anatomy of the animal seen when opened up along the left 

 dorso-lateral inter-radius. ( X 2.) 



a.c. = ambulacral ring-canal ; c.?: — calcareous ring ; d.m. = dorsal mesen- 

 tery*; d.v. = dorsal vessel; ff. = gonad; g.d. = genital duct; i. = intestine; 

 l.m. = longitudinal muscle-band ; m. = madreporic canal ; p. = Polian vesicle : 

 t = tentacles ; t.c. = tentacular canals ; t.77i. = transverse ridges formed by 

 the circular muscle-layer ; v.v. = ventral vessel. 



Fig. 17. Semidiagrammatic sketch of the anterior part of the alimentary canal, together 

 with the tentacles &c., viewed laterally. (X 12.) 



a.c. = ambulacral ring-canal ; c.r. = calcareous ring ; d. = diverticula of 

 tentacular canals ; ff. = gonad ; ff.d. = genital duct ; ?«. = madreporic canal ; 

 n. = radial nerve ; p. = Polian vesicle ; j)A. = pharynx ; pinn. = pinnules of a 

 tentacle ; t. = tentacles ; t.c. — tentacular canal. 



Figs. 18 fl-18 d. Phyllophorus longidentis. 



Spicules, showing various stages of development, (x 150.) 



Fig. 18 «. An early stage at which no perforations are complete and the two rods which 



form the spine are still distinct. 

 Fig. 18 h. A stage at which four perforations have been completed ; the two rods of the 



spine are still distinct. 

 Fig. 18 e. A more advanced stage at which the two rods have fused to form a single 



spine. 

 Fig. 18 d. Side view of a spinous plate. 



Figs. 19 rt-19 c. Holothuria difficilis. 



Fig. 19 a. A bilateral perforated plate. ( x 200.) 

 Fig. 19 6. Various biscuit-shaped spicules. (X 250.) 

 Fig. 19 c. Two views of a table. ( X 200.) 



Fig. 20. Phyllophorus dearmatus, sp. n. 

 Perforated end-plate from a tube-foot. ( X 150.) 



* The dotted line should be continued in a little further. 



