118 



NATURAL HISTORY 



surrounded with cilia, and is about 1 -400th of an inch 

 in length. Found in the common muscle. 



224. Leucophrys fiuxa. This animalcule is found 

 along with the last, and does not differ greatly from it. 

 It is generally of a contorted bean-shape, fringed with 

 cilia. 



225. Leucophrys armilla. The bracelet Leucophrys. 

 — This curious annular animalcule is also found with the 

 two preceding, but is more scarce : its form is shewn at 

 figure 139, with a portion of the inner edge ciliated. 

 Sometimes the circumference only appears ciliated. 



226. Leucophrys cornuta. The horned Leucophrys. — 

 This animalcule is shewn, magnified, at figure 138 : it is 

 in the form of an inverted cone, the mouth aperture 

 being at the base, which is ciliated, and furnished with a 

 horn at each corner : as these are not always visible, they 

 are probably clusters of cilia ; but this future observa- 

 tion must determine. The posterior extremity sometimes 

 consists of a single point ; at others, it is separated into 

 two or three points : occasionally, the sides may be ob- 

 served ciliated. From the globular sacs in the interior, 

 its polygastric structure may be inferred. Found in 

 stagnant water. 



227. Leucophrys heteroclita. The variable Leuco- 

 phrys. — This animalcule is visible to unassisted vision, 

 being nearly l-40th of an inch in. length. In swimming 

 it is ellipsoidal, and under a deep power appears co- 

 vered with cilia, as shewn in the sketch, figure 136. 

 When stationary, it alters its form, and thrusts out two 



