EXPLANATION OF PLATE XXXVIII. 



FIGURE 282. Hybocodon prolifer, (p. 736 ;) natural size, the head seen from the back 

 side. 



283. Alcyonium carneum, (p. 737 ;) three of the polyps fully expanded, much 

 enlarged. 



284. Sagartia leucolena, (p. 738 ;) natural size, in expansion, but the tentacles 

 are not fully extended; the * indicates the long odd tentacle. 



28. r ). Halocampa producta, (p. 738 ;) natural size, well "expanded, but the body 

 may be much more elongated. 



286. Epizoanthus Americanus, (p. 746 ;) a colony -which had completely cov- 

 ered and absorbed a shell occupied by a hermit-crab, (Eupagnrus 

 pubescens,) which still lived within the cavity; the polyps are not 

 expanded, natural size. 



287. The same ; one of the polyps in full expansion, natural size. 



(Figure 282 was copied from L. Agassiz ; 266 is from the American Naturalist, drawn l>y E. S. Morse; 

 the rest weir drawn by A. E. Vrrrill.) 



