364 LEON AUGUSTUS HAUSMAN. 



stripe. These larger tentacles, also, indicate the position, 

 within the body, of the equally numerous intermesenterial spaces. 

 Within the circle of tentacles lies the greenish oral disc, the 

 center of which is pierced by the mouth opening, surrounded by 

 the lip band. The latter structure is usually reddish in color; 

 is impressed by a number of folds about its inner edge; and 

 bears'two prominent, opposite, gonidial grooves. 



Since reproduction is often accomplished by longitudinal 

 fission, or less commonly by budding, or by dividing at the base 

 in a sort of budding process which Davenport (i) has termed 

 basal fragmentation, individual anemones vary considerably in 

 form and size, according to the stage of life which each is passing 

 through at the time of the observation. Mature individuals 

 which have not yet apparently begun reproductive activities, 

 are illustrated by Figs. I and 2. Extremely unsymmetrical, and 

 even monstrous; forms are frequently encountered, the results 

 of accidental mutilation, for regeneration of lost parts reaches, 

 with Sagartia, a high degree of development. Consequently 

 surprisingly small fragments often settle down and regenerate 

 an entire individual. Davenport has pointed out that new 

 tissue, in individuals which are the results of reproduction by 

 division, is of a hue of green less olive in tone that that of older 

 individuals, and that the new stripes are a brighter yellow, with 

 less orange tint. This is also true of new tissue which is being 

 regenerated to make up for some lost portion of the body. 



The general color scheme of Sagartia seems to be particularly 

 well adapted to the concealment of the creature. The olive 

 green of the body, broken by the longitudinal orange stripes, and 

 the grayish white of the tentacles, forms a color aggregation of 

 unusually subdued character when the animal is viewed in its 

 normal habitat. When fully expanded, and hence in its most 

 conspicuous attitude (Fig. i), the body becomes lighter in color 

 (because the more translucent) and the body assumes a trans- 

 lucency, as do also the tentacles. The latter, indeed, become, 

 often, virtually colorless, and almost transparent. The color of 

 the orange stripes likewise undergoes a diminution in intensity 

 as the expansion of the animal progresses. Under these con- 

 ditions, when viewed either from above or below (the latter by 



