Hydutinuea.} THE INFUSORIA. 363 



599. NOTOMMATA petromyzon. The lamprey Notom- 

 mata. Body elongated, attenuated at both ends ; mouth 

 and rotatory organ lateral. Ehrenberg says, in May, 

 1835, he found one in a Volvox globator, whose gem- 

 miferous masses it eats like N. parasitica. The eggs 

 are often deposited on Epistylis. Length l-180th to 

 1-1 44th. 



600. NOTOMMATA lacinulata ( Vorticella auriculata et 

 arcinulata, M.) The double-pointed Notommata. Body 

 small, conical, truncated, and slightly lobed in front; 

 teeth extended, often bicuspidate. This species is very 

 active. Found with Chlamidomonas pulvisculus in clear 

 water ; also in water-tubs. Length l-280th. 



601. NoTOMMATAybrczpafa. The scissor Notommata. 

 Body small, elongated ; toes long, and often crossed ; eye 

 very large. The vibratile organ appears sometimes of a 

 simple wreath. Found amongst lemna. Length 1- 180th. 



602. NOTOMMATA collaris. The thick-necked Notom- 

 mata. Body elongated, large, gradually attenuated at 

 both ends; neck turgid; toes short. It swims slowly, 

 the vibratile organ being small in comparison with the 

 body. Length l-48th. 



603. NOTOMMATA Werneckii. Wer neck's Notommata. 

 Body elongated, gradually attenuated at both ends ; toes 

 short. It has two setae near the mouth. This animalcule 

 resembles N. collaris, but is smaller, and lives in the club- 

 like excrescences of Vaucheria as an entophytic animal. 

 Length l-9()th. 



604. NOTOMMATA najas. Body conical, cylindrical, 

 stout, truncated in front ; no auricles. It resembles Hy- 

 datina senta and Eosphora najas ; it is distinguished from 



