16 P. JEFFREY V.FAAj. 



DESCRIPTION OF PLATES. 



ECHINODERMA. 

 Plate I. 



Promacochrinus kergnelenensis. 



Fig. 1. — Disc and base of arms from the side to show the insertion of the cirri, and the form of the 



cirrus pit, and the shape of the disc. X 2. 

 Fic;. 2. — Disc and base of arms from below ; the central boss is more distinctly seen than in fig. 1. 



X 2i. 

 Fig. 3. — An arm from the side, x 3 ; the roughened edges of the joints are well seen in this figure ; the 



proxiural pinnules only are completely shown. 



Plate II. 



Antedon adrinni. 

 General view of this Crinoid. x 2. 



Plate III. 



Heuremster hodgsoni. 



X not quite %, seen from below, to show the breadth of the ambulacral grooves, their size and 

 arrangement. 



Plate IV. 

 The young Ophiurid (see p. 14). 

 Fig. 1. — Aboral view of disc and arm. x f. 

 Fir;. 2.— Oral view of same. X J. 



Fig. 3. — View of mouth to show arrangement of the oral and adjacent plates, x X. 

 Fig. 4. — 1st, 2nd, and 3rd upper arm-plates. X 10. 

 Fig. .5. — View of arm from above, at about its middle, x 10. 

 Fig. 6. — Ist, 2nd, and 3rd lower arm-plates. X 10. 

 Fig. 7. — View of arm from below at about its middle, x 1<>. 



Plate V. 



Fig. la. — Variety of Cycelhra (sec p. 10) from above ; fig. Ih from below ; both slightly reduced. 



Fig. 2a. — Disc of an Opldosteira (see p. 12), magnified to show keel-like plates ; 2a, seen from above ; 



2b, seen from the side. 

 Fig. 3. — Pseudopsolus ferrari. x 3. 



