144 DESCEIPTION OF \^Polygastrica 



terior portion truncated with a double flagelliform proboscis. Body 

 turgid, and of a blueish green colour. Found with the Chlamido- 

 monas pulvisculus. Size 1- 864th. 



Cktptomonas (?) fusca. — Oval, turgid, and of a brown-colour. 

 Found amongst confervae. Size l-1500th. 



C. lenticularis. — Form orbicular, resembling a lens ; colour green ; 

 lorica thick. Size 1-1 729th. 



" The C. curvata!'' — says Dujardin, " is so compressed that it is 

 properly referable to our genus Crumenula,''^ The C. glauca and 

 C. fusca, the same observer regards as doubtful species. The two 

 foUowing species are described, and named by Dujardin. 



C. globulus. — Body globular, green, often with folds (stripes), 

 nearly as large as the diaphanous envelope. Length 1 -2600th., 

 1 -2250th. 



C. incequalis, — Body ovoid, gi'een, of less thickness than breadth, 

 with a longitudinal depression, and one or two unequal notches in 

 the coloiu'ed portion, which is always narrower than the envelope. 

 Length 1 -2600th. Found in stagnant sea water, imparting to it a 

 green colour. 



C. (Lagexella) inflata. — Body ovoid, enlarged posteriorly ; con- 

 tracted anteriorly ; envelope transparent, thicker about the anterior 

 neck-like portion ; fiUed with a green substance, having a centi-al 

 red speck. Motion zig-zag. Length 1-1 180th. Found in a vase 

 of marsh water, with lemna. 



Ehrenberg has described under the name of Lagenella eiicMora, 

 an Infusorian of the same size, differing from om's by its more 

 elongated form, and especially by the green contents, more com- 

 pletely occupying the anterior neck-like portion, whereas in ours 

 but a narrow streak is visible. 



C. (Tetkab^na) socialis. Body ovoid, regular, green, with a cen- 

 tral red poiat, enveloped by a thick lorica, which is diaphanous, and 

 often exhibits a commencing self-division. Animfils living, collected 

 in regular groups of four individuals, simply agglutinated, and 

 having their filaments directed all to the same side. Length 

 1-1 700th, l-1300th. Found in a water-butt, in the King's 

 garden, Paris. 



** I should have taken the specimens at first for Gonia, if a trace 



