Plate 57 



Fig. 1. Astrometis californica. Fourth to seventh superomarginal plates; beaded ana not indi- 

 cated; X 10. la. Same. Twentieth to twenty-third superomarginal plates, beaded 

 area outlined by dots; X 10. 



2. Astrometis sertulifera; type of Orthasterias dawsoni. Fourth to seventh superomarginal 



plates, beaded area not indicated, X 10. 2</. Same specimen; twenty-first t<> twenty- 

 third superomarginal plates; beaded area outlined; X 10. 



3. Astrometis sertulifera, specimen from La Jolla, fourth to sixth marginal plates from right to 



left, X 10. The actinal plates are shown under the inferomarginals. 3a. Same speci- 

 men. Twent y-seventh to thirtieth superomarginal and inferomarginal plates from right 

 to left, X10. ' 3b. Same. No. 38533, U.S.N.M. Santa Margharita Island, L. C. (See 

 pi. 56, figs. 1, Id, ]b.) Twenty-seventh to thirtieth superomarginal and inferomarginal 

 plates, X10. 



4. Astrometis sertulifera: type of Orthasterias dawsoni. Mouth plates and proximal adambu- 



lacrals; suboral spine shown only on one plate, X 10. 



5. Astrometis californica, type. Mouth plates and first three pairs of adambulacral plates 



X10. 

 218 



