Plate 45 



Stylasterias forreri 



Fig. 1, la. Large abactinal straight pedicellariae from large specimen, Kill Bay, Alaska; length 

 2.5 mm.; X25. lb. Same specimen as 1; smaller abactinal pedicellaria from skin 

 of outer pari of ray; length, 1.7.") mm.; • 25. 



L'. Abactinal dermal pedicellaria, station 1556, Monterey Hay; length 2.3 mm.; 25. 



:;, :;./. Same, from specimen from station 1410, off Santa Catalina Island; length of 3, 2.8 

 mm.; of •'«. 1.3 mm.; 25. 



4. Specimen, from station 4552, having smaller dermal pedicellariae; length. 1.7 nun.; X25. 



5. Portion of a cleaned actinostomial ring, seen from inside, and looking out through actino- 



stome into which two oral angles project, station 4552, X5. .1, enlarged first ambu- 

 lacral ossicles; /, interbrachial pillar or septum; 0, odontophore; .1/. oral plates; .1/'. 

 dorsal apophysis of oral plate (see 56). 5a. Ventral surface of an odontophore, X5. 

 56. Side view of first ambulacral ossicles with a -ingle mouth plate (Af); the median 

 sutural face is exposed while x and xx are the junction points with the lateral facet - i f 



tl dontophore (see fig. 5) . The free edge, with three spines is turned away: .1/;, 



first adambulacral ossicle. 



6. Mouth plates of an alcoholic specimen, station 4554, seen from furrow face; X5. 



7. Same specimen as tig. 5; cleaned mouth plates and first three pairs of adambulacrals; 



station 1552; It about 180 mm.; X5. 



8. Two inner inferomarginal spines from large specimen from Kell Hay, southern Alaska, X5. 



8a. End of left spine, <10. 86. An outer inferomarginal spine, <5; all from proximal 

 third of ra\ 



206 



