036 DESCEiPTioN OF iBotatoriu 



spaces within the cilia cluster (mouth) being convex, not concave. 

 Pound in a turf pool. Length l-40th. 



NoTOMMATA hjptopus. — Body bell-shaped, nearly globular, rather 

 large ; foot slightly prominent at the middle, teeth small ; vibra- 

 tile organ composed of four or five muscular bundles; oesophagus 

 very short. Length l-72nd. 



N. parasita. — Body small, oval ; foot short, teeth small ; rotatory 

 apparatus, three or four lobes ; (Esophageal head globose ; oesophagus 

 short ; alimentary canal stout, simple, usually filled with green 

 matter. This curious animalcule lives in the globes of Volvox glohator, 

 where it deposits its eggs, which are therein hatched ; and when of 

 proper age, the creatures eat their way out through the hollow 

 sj)here. Length l-40th. 



N. granulans. — Body short, cylindrical, trancated at both ends ; 

 foot slender. The body has always a few dark granular bodies within 

 it. Dr. E. discovered it in 1831. In 1835 he observed eggs of two 

 sizes on the dorsal siu'face of N. Irachionus ; the smaller ones were 

 distinguished by dark granules within them, and produced IS. granu- 

 laris. Prom other observations, he concludes these eggs of N . granu- 

 la/ris are deposited by the parent upon N. hrachionus, like the cuckoo, 

 who lays her eggs in the nests of other birds. Length 1 -280th. 



N. petromgzon. — Body elongated, attenuat ed at both ends ; mouth 

 and rotatory organ lateral. Ehi-enberg says, in May, 1835, he found 

 one in a Volvox glohator, whose gemmiferous masses it eats likes X. 

 paralitica. The eggs are often deposited on Epistylis. Length 

 l-180th to l-144th. 



N. lacinulata {Vorticella auriculata, et arcinulata, M.) — Body small, 

 conical, truncated, and slightly lobed in fi'ont ; teeth extended, often 

 bicuspid. This species is very active. Found with Clilamidomonas 

 pidvisculus in clear water; also in water tubs. Length 1 -280th. 



N. forcipata. — Body small, elongated ; toes long, and often crossed •, 

 eye very large. The vibratile organ appears sometimes like a simple 

 wreath. Found amongst Lemna. Length l-180th. 



N. collaris. — Body elongated, large, gradually attenuated at both 

 ends ; neck turgid ; toes sliort. It swims slowly, the vibratile organ 

 being small in comparison with the body. Length 1-4 8th. 



N. WcrnecUi. — Body elongated, gradually attenuated at both ends 



