184 J. S. KITTREDGE et al. 

Figs. 35-37. Fig. 35, a bubble shell, Bullaria gouldiana; Fig. 36, a periwinkle, Littorina planaxis; 
Fig. 37, a mussel, Mytilus californianus. Taurine, 5; alanine, 8; glycine, 14; arginine, 15; lysine, 
16; glutamic acid, 17; unknown amino acid, U. 
vs 
ae 
Pe. 

40 | A 

we 
Figs. 38-41. A sea urchin, Strongylocentrotus purpuratus. Fig. 38, Aristotle’s Lantern muscles; 
Fig. 39, intestinal tract; Fig. 40, gonads. Fig. 41, a starfish, Pisastey ochvaceus. Taurine, 5; glycine, 
14; arginine, 15; lysine, 16; tyrosine-O-sulfate, DG]. 
References p. 186 
