OF ANIMALCULES. 125 



243. Trichoda urinarium, flask-shaped, with the 

 mouth ciUated. Found in stagnant water. 



244. Trichoda semiluna. — This animalcule resembles 

 the moon at the first quarter ; the ends are truncated, 

 and the upper one furnished with cilia. 



245. Trichoda trigona. The three-sided Trichoda. — 

 The apex of this triangular- shaped animalcule is furnished 

 with cilia, and the mouth is a longitudinal aperture near 

 them, on the inferior side -, the lower corners are ob- 

 tusely blunted. 



246. Trichoda tinea.— P^ club-shaped animalcule, 

 with the smaller or anterior extremity ciliated. 



247. Trichoda nigra. The black Trichoda is of an 

 elliptical form, with the anterior ciliated : the inside 

 sometimes appears violently agitated when the creature 

 becomes very opaque. Found in sea-water. 



248. Trichoda pules. — A large bag-like animalcule, 

 with several digestive sacs : when the water has nearly 

 evaporated, it stretches out its head, and exhibits a row of 

 cilia and several folds along the body. Found in December. 



249. Trichoda Jloccus. — This animalcule, found in 

 stagnant water, is shewn at figure 141. The anterior is 

 pointed, and the posterior furnished with two or three 

 clusters of hair : it is capable of contracting its body. 



250. Trichoda sinuata, — This is a long trichoda, 

 tapering towards the anterior extremity ; the body is in 

 the form of a crescent, with the concave side ciliated, 



251. Trichoda prceceps. The quick Trichoda. — This 

 animalcule is represented at figure 142 ; it is capable of 

 extending the neck. I found it in an infusion of the 



