Hydatinaea.'] infusorial animalcules. G37 



toes short. It has two seta; near the moiith. This animalcule 

 resembles N. collar is, but is smaller, and lives in the club-like ex- 

 crescences of Vaucheria as an cntophyte. Length 1 -90th. 



NoTOMM.vTA najas. — Body conical, cylindrical, stout, truncated in 

 front ; no auricles. It resembles Ilydatina senta and Eospliora najas ; 

 it is distinguished from the first by its cervical eye, from the 

 latter by want of frontal eyes. Amongst Lcmna. Length l-120rh. 



K. aurita ( Vorticella aurita, M.) — Back swollen near the tail, and 

 thus gibbous ; the corners at the front project like ears. Beneath 

 the ej-e is an obscure white, globular, purse-shaped organ. Found 

 amongst Conferva, &c. ; also beneath ice. Length l-200th. (P. 23, 

 f. 3, 4, 5, 6.) 



N. gihha. — Back swollen, front truncated, not auiicled, no cerebral 

 sacculi below the eye ; toes short ; the vibratile organs compound. 

 Found in old exposed infusions. Length 1 -200th. 



N. ansata {Vorticella aurita, M.) — Body turgid in the middle, 

 suddenly truncated at both ends ; the front auriclcd, no cerebral 

 sacculi below the eye ; toes thick. Found in bog- water amongst 

 Conferva. Length 1-1 20th. 



N. decipiens. — Body cylindrical, not auricled ; toes short ; the 

 ovarium often contains four large eggs. Length 1-1 80th. 



N. (?) felis. — Body small, slender; one horn in front; eye colour- 

 less; back attenuated posteriorly, and forked. Length 1 -240th. 



N. (?) tigris {Trichoda tigris, M.) — Body cylindrical, curved, foot 

 half the length of body ; toes very long, and curved downwards ; it 

 has a little horn in front ; the eye is large and red. Found amongst 

 Oscillatoria. Length l-72ud. 



N. longiseta {Vorticella longiseta, M.) — Body cylindrical, truncated 

 anteriorly ; toes styliform, unequal, and two to four times longer 

 than the body ; it is active, and frequently leaps, being assisted by 

 its long claws, which resemble tails. Fig. 421 is a full-grown 

 sijecimen. Entire length l-60th. 



N. ccqualis { Vorticella longiseta, M.) — Body cylindrical, obtuse in 

 front; toes styliform, equal the length of the body. Length 1- 120th. 



{h.) Suh-gentis Clenodon. — Jaws many -toothed. 



N. clavulata. — Body bell-shaped, foot conical, veiy short ; pan- 

 creatic glands of u club-shape. Tliis creature presents great facility 



