PLATE II 



Figs. 1-4. Sterechinus Neumayeri (Meissner). 



1-3. Specimensoflong-spined form, oral side (i,3)andaboralside(2). 



4. Large specimen, oral side. 



Figs. 5-10. Notechinus marionis, n.sp. 



5, 6. Adult specimens, oral side (5) and aboral side (6). 



7-10. Denuded tests, aboral side (7), oral side (8); side view (9, 10). 



Figs. H-16. Sterechinus Agassizii, Mortensen. 

 II. Young specimen, oral side. 

 12, 13. Weil preserved specimens, showing the dense coat of very 



slender spines. Aboral side (12) and oral side (13). 

 14-16. Denuded test of very large specimen ; side view (14), aboral 



side (15) and oral side (16). 



All figures natural size. 



N.B. Figure 5 has become blurred in the reproduction, the spines 

 looking as if they were serrate. In reaUty they are quite smooth, as 

 in Fig. II. 



