Plate 155. 

 1. Brissopsis pacifica ( A. Ag.). 



1. Abactinal view of unusually large specimens (St. 3035). 



2, 3. Brissopsis luzonica (Gray). 



2. Abactinal view of specimen from the Hawaiian Islands. 



3. Actinal view of same. 



4, 6, 8. Brisaster townsendi (A. Ag.). 



4. Abactinal view of bare test from off southern California (St. 2909). 



6. Abactinal view of specimen from off southern California (St. 2892). 



8. Actinal view of specimen shown in fig. 4. 



5. Brisaster moseleyi (A. Ag.). 



5. Abactinal view of bare test of a young individual from near Cambridge Island, 



Chile. 



7, 9. Tripylaster philippii (Gray). 



7. Abactinal view of bare test from the Straits of Magellan. 



9. Actinal view of same. 



All figures, natural size. 



