OUR KNOWLEDGE OF NEW ZEALAND HOLOTHURIANS. 123 



Fig. 3. Vertical section of a ciliated depression (" taste-pit " ) from the buccal rep:ion, with 

 the surrounding- integument. ( X 900.) 



c. = central core of sensory cells bearing short cilia ; cm. = circular muscle- 

 layer ; c.s. = supporting columnar cells ; c.e. = columnar epithelium of body-wall 

 cu. = cuticle ; n. = nerve supplying the taste-pit ; 7i.l. = nerve-layer ; c.l. = con- 

 nective-tissue layer ; s.l. = granular wandering-cell. 



Fig. 4. Transverse section of a branch of a tentade. ( X 500. ) 



c.e. — columnar epithelium ; c.l. = connective-tissue layer ; cm. = circular 

 muscle-layer ; ci(. = cuticle ; ?«. = thin basement membrane supporting the 

 longitudinal muscles ; 1.7)1. = longitudinal muscle-layer ; p. = peritoneal layer. 



Figs. 5 fl-5 b. Stichopus simula?is, sp. n. 

 Fig. 5 a. Table. 

 Fig. o b. Dichotomously foliaceous spicules. 



Figs. 6-G a. Psetidocucumis bicolumnatus, sp. n. 



Fig. 6. View of entire animal, (x I5.) 

 Fig. 6 a. Part of the calcareous ring. ( X 9.) 

 i.r. = inter-radial ; r. = radial. 



Figs. 7-8. Fhyllophorus dearmatus, sp. n. 



Fig. 7. View of entire animal. (X 1\-) 

 Fig. 8. Part of calcareous ring, (x 3.) 



i.r. — inter-radial : ?■. = radial. 



Plate 12. 



Figs. 9-11 A. Chirodota gigas, sp. n. 



Fig. 9. Sketch of a part of the calcareous ring. ( x 10.) 



i.r. = inter-radial ; r. = radial. 

 Fig. 10. Diagram of the water-vascular ring and its appendages. ( x .) 



m. = madreporic canal; p. = Polian vesicles : r. = ring ual. 

 Fig. 11 a. Miliary granules from the radii. ( X 250.) 

 Fig. 11 b. Curved rods, (x 250.) 

 Fig. 11 c Fully developed wheel, (x 250.) 

 Fig. 11^. Optical vertical section of a wheel. ( x 250.) 

 Figs, lie, 11/. Developmental stage of the wheel, (x 490.) 



11 e = inner face of wheel; 11/ = outer face. 

 Fig. 11^. A four-rayed wheel (abnormal), (x 490.) 

 Fig. 11 h. Curved rods from the tentacles, (x 280.) 



Fig. 12. Stichopus mollis. 

 Irregular perforated plate I'roui a tube-foot, (x 250.) 



Figs. 13-14. Pseudocucumis bicolumnatus, sp. n. 

 Figs.l3a-13 J. Spicules of the integument, (x 350.) 

 Fig. 13 «. Three views of characteristic tables. 

 Fig. 13 b. A single table with one column (abnormal). 

 Fig. 13 c. An oval perforated plate. 

 Fig. 13 f/. An irregular perforated plate. 



