4: A. H. H. LATTEY, OBSERVATIONS ON THE POLYZOA. 



it matters not which — when they will be observed to come out in 

 greater numbers, evidently attracted by the taste of the spirit, and 

 as it continues to be added they become evidently excited, with- 

 drawing into their cells, and coming out again, bending about, and 

 the ciliee meanwhile moving in the most rapid manner. This con- 

 tinues for some time, until at length they begin to flag in their 

 movements, which become more and more sluggish, the animals 

 being apparently drunk. This is the moment to pour off the 

 alcoholized sea-water, and pour upon them the preservative fluid, 

 which has the desired effect of bringing out all that are still left in 

 their cells, and gradually killing them, and it has the immense 

 advantage of being at the same time a most excellent fluid for pre- 

 serving them, so that they can remain in it. I find it of great ser- 

 vice to let the Halodactylus lie for a considerable time in this fluid 

 before finally putting them up, as a certain amount of deposit takes 

 place from the sea-weed, which it is better to exclude from the cell. 

 The preserving fluid I use is one recommended by Dr. Beale, as a 

 modification of Thwaites', and is prepared as follows : — 



Mix three drachms of creosote with six ounces of wood-naphtha, 

 and add, in a mortar, as much prepared chalk as may be necessary 

 to form a smooth thick paste ; water must be gradually added to 

 the extent of 64 ounces, a few lumps of camphor thrown in, and the 

 mixture allowed to stand for two or three weeks in a lightly covered 

 vessel, with occasional stirring ; after which it should be filtered 

 and preserved in well-stopped bottles. 



[Notice.— Plates i. and ii., illustrating Mr. Furlonge's paper on the 

 Flea, will be issued with the next No. of this Journal.] 



