EXPLANATION OF PLATE XXXVIII. 
FIGURE 282.—Hybocodon prolifer, (p. 73€;) 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 exteuded; the * indicates the long odd tentacle. 
285.—Halocampa producta, (p. 738;) natural size, well expanded, but the body 
may be much more elongated. 
286.—Epizoanthus Americanus, (p. 740;) a colony which had completely coy- 
ered and absorbed a shell occupied by a hermit-crab, (Eupagurus 
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; 286 is from the American Naturalist, drawn by E. 8. Morse; 
the rest were drawn by A. E. Verrill.) 
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