PLATE IX 



Figs. 1-4. Notechinus marionis, n.sp. 



1, Tridentate pedicellaria. x 100. 



2, 3. Valves of globiferous pedicellariae, small (2) and large form (3). 

 2, X 200; 3, X 100. 



4. Valve of triphyllous pedicellaria. x 200. 



Figs. 5-7. Plexechinus Nordenskjoldi, Mortensen. Valves of tridentate 

 pedicellariae. x 100. 



Fig. 8. Ctenocidaris Geliberti (Koehler). Valve of large globiferous 

 pedicellaria. x 72. 



Figs. 9-1 1. Abatus cavernosus, var. bidens, Mortensen. Valves of tri- 

 dentate (9), globiferous (10), and rostrate pedicellariae (11). x 100. 



Figs. 12-16. Abatus elongatiis (Koehler). Valves of tridentate (12), 

 globiferous (two valves in connection) (13), rostrate (14), tri- 

 phyllous (15), and large tridentate pedicellariae (16). x 100. 



Figs. 17-20. Abatus curvidens, n.sp. Valves of tridentate (17), rostrate 

 (18), and globiferous pedicellariae (19-20). x 100. 



Figs. 21-26. Amphipneustes stmilis, n.sp. Valves of triphyllous (21), 

 globiferous (side view, 22 ; from the inside, 23), tridentate (24, 25), 

 and rostrate pedicellariae (26). x 100. 



Fig. 27. Amphipneustes Lorioli, Koehler. Valve of globiferous pedi- 

 cellaria. x 100. 



