Plate 71 



I H. i m: I. Stephanasterias albula, station 1792; projection of skeleton from carinals, C, to infero- 



marginals, /. proximal third of ray; 1, 2, '■>, 1. dorsolateral si ries of skeletal meshes; 



AD, direct) f disk; S, superomarginals; 12. 



1«. Same, station 17'.)'-'; mouth plates and first two pairs of adambulacrals; 20. 



16. Same, abactinal pedicellaria, 0.25 mm., X200. 



Lc. Same, station 3548; a straighl pedicellaria from mouth plates, two views, 1.25 mm., 



25. 

 Id. Same, station 1792; abactinal straighi pedicellaria, 0.54 nun.. 50. 

 le. Same pedicellaria, 25 for comparison with lc. 



1./'. S.- ■, station 3548; abactinal pedicellaria, X50. 



1(/. Same, station 4792; two abactinal spinelets, 0.4 and 0.5 nun., ■ 100. 



2. Leptasterias aequalis, embryos carried by female, drawn from living specimens, much 



enlarged. 

 2a. 'Pun views of a later stage, rays beginning In appear; 3-lobed larval organ below; 



March 25, 1927; 20. 

 26. A still later stage i March 30, 1927), 22. 

 2c. Stage in which the six rays are well defined and larval organ is disappearing (April 



I. 1927). 

 :;. Perissasterias polyacanlha, 170 fathoms, northwesl of Dassen Island, Cape Colony, No. 



2875, Mus. Comp. Zool., oral angle, I. 



326 



