OF ANIMALCULES. 12/ 



globular mass. When it casts its spawn, the posterior is 

 dissipated like the Kolpoda cucullus, and its form entirely 

 changed. 



256. Trichoda patens {Urostyla grandis, E.) The 

 gaping Trichoda, — This is a long cylindrical animalcule, 

 with the mouth-aperture, which is large, and surrounded 

 by long cilia, placed longitudinally near the upper end. 

 (See Book III.) 



Trichoda patula. (229, page 119.) 



257. Trichoda foveata. The oblong, ihree-horned 

 Trichoda, has the anterior part ciliated : it probably be- 

 longs to the section Oxytrichina ; Book III. 



258. Trichoda striata. The striped Trichoda is very 

 diaphanous, and resembles the Kolpoda, figure 84. 

 The body is long, the upper extremities smallest, and 

 ciliated on the concave side to the middle, when it is 

 abruptly enlarged. Found in river- water, in December. 



259. Trichoda uvula. — This is a minute animalcule, 

 rather flat, nearly of an equal size from one end to the 

 other, which is six times its breadth : anterior ciliated. 

 Found in an infusion of hay, &c. 



260. Trichoda aurantia. The orange-coloured Tri- 

 choda is found among lemna ; it resembles the Kolpoda 

 cucullus; figure 89. 



261. Trichoda prisma. This is a small pellucid boat- 

 shaped animalcule ; the under side convex, and edged 

 with a bright longitudinal line. Found in sea-water. 



262. Trichoda ignita. — This animalcule is shewn, 

 magnified, at figure 143 : a row of cilia and two setaceous 



