PLATE XXXI. 



Abactinal System of 



1. Pavasalenia gratiosa, copied from A. Agassiz. 



2. Temnopleurus Reynaudi, copied from A. Agassiz. 



3. Temnechiims maculatus, copied from A. Agassiz. 



4. Trigonocidaris albida, copied from A. Agassiz. 



5. Trigonocidaris monolini, copied from A. Agassiz. 



6. Pleurechinus bothryoides, copied from A. Agassiz. 



7. Strongylocentrotus Drbbachiensis (anal plate), copied from A. Agassiz. 

 8-10. Toxopneustes variegatus, copied from A. Agassiz. 



11. Echinus horridus, copied from A. Agassiz. 



