EECEEATIVE SCIENCE. 



311 



occupying little room, and, when made of 

 moulded glass, of being so strong that a 

 dozen of them may be carried in the pocket, 

 and with little chance of breakage. 



Returning home, a 

 very little piece of the 

 green mass, which con- 

 sisted of confervoid 

 plants, was placed in a 

 cell formed by cement- 

 ing a glass ring, such 

 as opticians sell for 

 mounting specimens, 

 on an ordinary glass 

 slide. The ceU was 

 then filled with the 

 pond-water, and one 

 of the pieces of round 

 thin glass used in co- 

 vering objects, placed 



Vorticella convallaria. A 

 group of three, with the 

 spirally deflected pedicle 

 of a fourth. — Pritchard. • 



over it, and pressed down 

 gently, with a piece of blot- 

 ting-paper to remove the su- 

 perfluous moisture. When 

 a cell is thus closed, the 

 cover is retained by the 

 action of capillary force, 

 and may be turned upside 

 down without spilling its 

 contents. Such cells are 

 very convenient for exa- 

 mining moderate- si zedwa- 

 ter creatures, which require 

 more room than can be 

 given in the live-box, and 

 will hold what seems under Vorticella, with pos- 

 the microscope aUttleforest terior circlet of cilia 

 „ , • mi ""^ process of sepa- 



of vegetation, Ihey are nation, 300 linear. 

 handy for polyps, young ^Siein. 

 tadpoles, worms, etc., etc., and a conve- 



nient size is made by employing glass rings 

 of about three-quarters of an inch in dia- 

 meter, and one-twelfth of 

 an inch thick. As they 

 are only intended to hold 

 water, they may be fastened 

 to the slide with shellac 

 dissolved in pyroligneous 

 ether. 



■ To return to our find- 

 ings, they consisted chiefly 

 of the Huglena, described 

 by Mr. Tufi'en West in the 

 article already alluded to, 

 but without their tails. 

 Vorticella microstoma, Their curious roUing way 

 showing alimentary ... i T 



tube.cUiatedmouth, of swimmmg and extraor- 

 and formation of a dinary changes of shape, 

 yemma at the base, -^yere enough to bewilder 

 800 linear, — Stein. , , . , . , , 



anybody anclined to take 



them for plants, and at the same time to base 

 any arguments upon the sort of 

 motions supposed to be cha- 

 racteristic of animal life. But 

 there were also a few of the 

 common wheel animalcules, 

 Motifer vulgaris, a few Vorti- 

 cella, with and without stalks, 

 a Cyclops, which was acci- 

 dentally lost, a fine Closte' 

 rium lunula, and a swarm of 

 Diatomacea of the boat shape, 

 whose way of swimming is well 

 worth notice, as it often pre- 

 sents puzzling peculiarities, 

 the cause of which is un- 

 known. Having taken a gene- 

 ral view of the various matters 



in the cell-slide, with a low _ _^. ,, . 



Till Vorticella in prO' 

 power — two-thirds reduced by cess of self-di. 

 an erector, to from 20 to 30 

 linear, and, with the second 

 eye-piece for objects, near the 

 surface, brought up to 60 or 

 80 — aEotifer and some Vorti- 

 cella) were placed, with a very minute piece 



vision. A new 

 frontal wreath 

 in formation in 

 each of the 

 semi - lunar 

 spaces. 



