THE BRISTLE PLUMULARIA. 811 



they were Kestrels ; and this curious liabit of remain- 

 ing suspended on the wing in the face of the wind, has 

 acquired for them the provincial names of Standgale 

 and Windhover. The pelting storm drove me into 

 the house ; but when it had abated, after some half- 

 hour's duration, I again looked out, and there were 

 the hawks hovering yet, just where I had left them. 



THE BRISTLE PLUMULARIA. 



Aug. \^th. — I found a Spider-crab in a hole, whither 

 he had retired for the purpose of sloughing. The 

 carapace and limbs were thickly studded with Anten- 

 nularia antennina, and Pliunidaria cristata, many 

 stems of each Avell set with ovigerous vesicles. One 

 of the stems of the latter bore, parasitically springing 

 from it, many stems of a more delicate congener, 

 Plum, setacea, and some of these were also furnish- 

 ed with vesicles, which I presently submitted to 

 examination. 



I selected a specimen with many vesicles, some 

 empty, some broken off in the middle, others contain- 

 ing more or fewer gemmules, or "planules;" and one 

 in the midst of the last-named, uniformly filled with 

 the common granular matter of the medullary core, 

 not yet condensed into ova. About live or six seemed 

 to be the complete number of gemmules in one vesicle, 

 of which those nearest the narrow neck were alive and 

 active, while the most remote was a small motionless 

 sphere. 



My attention was presently attracted to a gemmule 

 free in the water, which I knew to have just escaped. 



