PLATE LXXV. 



FIGS. i-id. Orthasterias merriami Verrill. Spines and pedicellariae from No. 

 1181 ; I, a, b, c, and ic, ordinary dorsal spines ; ia, a, b, c, 

 marginal spines; ic, adambulacral spines; i&, a stout dorsal 

 with a major pedicellaria attached; id, inf eromarginal ; X 

 14; No. 1181, Mus. Comp. Zool. 



FIGS. 2-2&. Orthasterias dawsoni Verrill. Type. Spines and pedicellariae, 

 X2o; 2, a, b, large valves of major pedicellariae ; 20, dorsal 

 spines; a, with wreath of minor pedicellarise ; b, c, pedicel- 

 lariae removed; 2b, adambulacral spines; a, b, from inner 

 row ; c, d, from outer row. 



FIGS. 3-3c. Orthasterias koehleri (deLoriol) Verrill. Type. After de 

 Loriol; 3, part of dorsal side, about natural size; 30, four 

 dorsal ossicles and spines; 36, portion of actinal side, X 

 3/4; y, a major pedicellaria; X 16. 



