Fig. 3- 1-7, P solus patagonicus Ekman. 1, Dorsal view of 9 mm specimen. 2, Ventral view of same speci- 
men, showing disposition of tube feet. 3, Plates and buttons. 4, Tentacle deposits. 3, Tube foot deposits. 6 r 
Portion of calcareous ring. 7, End plate of tube foot. 
8, Trochodota purpurea (Lesson), tentacle deposits. 
