2/8 CHAS. W. HAKGITT. 



of the Hertwigs (op. cit., p. 22), as to the distribution of the 

 sense cells in actinians. They also agree substantially with some 

 of their experimental observations as to the unequal distribution 

 of the sensory areas, though on this point they gave slight atten- 

 tion to the effect of light as a stimulus (ibid., p. 190). 



Sagartia inodcsta. - This anemone has much in common 

 with the former species. It is a creature having its habitat in the 

 sand just below or near low tide line. Like the former it takes 

 somewhat readily to the artificial environment of the aquarium, 

 though seems somewhat less hardy under these conditions. I 

 first studied this species in its native haunt, having found several 

 specimens on an accessible beach. I first found them just before 

 twilight, and in the shadow of a large boulder which still further 

 reduced the light, with the tentacles extended very much as in 

 the case of Eloactis ; the body was not protruded beyond the tube. 

 Going again in the brightness of early morning they were not to 

 be seen, no sign of tentacles even in the partially closed burrow. 

 I made these observations several times, and concluded that they 

 were probably also nocturnal. 



Specimens were collected and taken to the laboratory and 

 placed in the same general conditions as were the former species. 

 Experiments similar to the former were performed, but with 

 much less promptness or clearness in reactions. Placed under 

 the dark chamber there was not the ready extension of the body 

 as in Eloactis. Further, on removal of the hood the response 

 was much less sharp and convincing, though quite evident. 

 Placed on a table upon which a beam of sunlight could be 

 reflected it was found when the ray was reflected upon the 

 numerous tentacles that there was immediate reaction. It should 

 be stated that in this species the tentacles are very numerous, 

 even a hundred or more, and form a dense crown in expansion 

 covering the oral region like an umbrella, while in the former 

 species these organs are but twenty in number and rather short. 

 In Scgartia the tentacles seemed more sensitive than in the 

 former species, or than the oral region, but this may be due in 

 some measure to their numbers, and to the general relations they 

 sustain to the oral portion of the body, especially the region 

 just below the tentacles. Still the results agree again with the 



