AUT TOOT TTT TTT TAT TT ATT TT 
Fig. 141a.—Echinus on its back, 
TAT RE aE TTT TTI 
Fig. 141b.—Echinus extending its sucker on beginning to right itself, 
ill ere TTT 
Fig. 141c.-Echinus half way over.—After Romanes. 
[To face page 200.] 
