Plate 149. 

 1-3. Gonimaretia laevis H. L. Clark. 



1. Apical system. X 5. (Interambulacral plate 5 6 1 should not separate the 



ocular plate from ambulacral plate I a 1). 



2. Posterior view of bare test. X 4. 



3. Peristomial region. X 4. 



4. Spatangus californicus H. L. Clark. 



4. Periproctal region and subanal plastron. X 2. 



5. Spatangus pallidus H. L. Clark. 



5. Posterior view of bare test. X 2. 



