130 NATURAL HISTORY 



at figures 148 and 149 : the neck is capable of elongation, 

 and the head is furnished with cilia, 



277. Trichoda paxillus is a small cylindrical animal- 

 cule, with the anterior ciliated. 



278. Trichoda meiitea, — This singular animalcule is 

 shewn at figure 152 ; it can contract itself at pleasure : 

 a peristaltic motion is sometimes observed. Scarce. 



279. Trichoda amhigua is shewn, magnified, at figure 

 161. Sometimes it appears like a bent cylinder, without 

 cilia, and protrudes a short proboscis from the anterior. 

 Found with the two preceding in sea- water. 



280. Trichoda fimhriaia, — This is like the Kerona 

 Jiaustrum. It is egg-shaped, with the lower end pointed, 

 resembling a top. The larger extremity is furnished 

 with a row of long fimbrillae, and one side is serrated. 



281. Trichoda camelus. — This is similar to the last, 

 except that the end is rounded, the body not symme- 

 trical, and the side without serratures. 



282. Trichoda augur. — This animalcule is shewn at 

 figure 151 : it has three hooks or claws, below which is 

 a fringe of long hair. 



283. Trichoda /?Mpa resembles the pupa of the com- 

 mon gnat in miniature : the head is globular, and ciliated 

 on the upper margin ; the body taper and bent; at the 

 lower part of the head is a large pellucid corpuscle. 



284. Trichoda clavus. — This is a small animalcule, 

 with the head ciliated, as shewn at fig. 150. 



285. Trichoda gallina is represented at figure 174. 

 Found in river- water. 



286. Trichoda musculus, — This animalcule is nearly 



