THE WHEEL ANIMALCULES (ROTATORIA) 617 



129 (126) Dorsal antenna very large, with two projections or hooks :ii its 



side Ccphalosiphon Ehrcnbcrg. 



Corona nearly circular with a distinct dorsal gap. Ventral antennae small or absent. 



Representative species (Fig. 956). . Ccphalosiphon limnias EhrcnherK. 



130 (122, 133) Not attached nor forming colonics, save that one adult may 

 be grouped with its young 131 



131 (132) Not forming tubes Psciidoccistcs Stcnroos. 



In other respects like Cephalosiphon. One or two species. 



Representative species (Fig. 954). . . Psciulocc isles rotifer Sicnroos. 



132(131) Inhabiting a tube Cojiochiloides Uhva.. 



Individuals separate or one grouped with its young. One or two species. 



Representative species (Fig. 953). . . . Conochiloides nalans Seligo, 



133 (122, 130) In clusters of many individuals, forming usually a spherical 

 ~~ colony appearing to the naked eye as a yellowish ball. . 134 



134 (137) Clusters attached US 



135 (136) No tubes Mcgalotrocha Ehrcnbcrg. 



Colonies often several millimeters in diameter, attached to plants Individuals not imbedded 

 in a gelatinous mass; corona broad, kidney shaped. Body usually with two or four opaque 

 warts. Several species. 



Representative species (Fig. 955). .,1 



Megalolrocha albojlavieans Ehrcnbcrg. 



136 (135) Dwelling in transparent gelatinous tubes. . Laciuidarui Schwcigger. 



Colony, a mass of some mm. in diameter, often appears to 1)C imbeddeii in a mass of jelly. 

 Corona heart shaped (Figs. 861, A, and 865). Several species. 



Representative species (Fig. 86i,.4, page 561. and Fig. 865. page 575). 



Lacinularui socuilis Ehrcnbcrg. 



137(134) Clusters or colonies free swimming. . . . C(7wor//;7w;y Ehrcnbcrg. 

 Two or three species. 



Representative species (Fig. 952). • ConochUus unuornis Roussclet. 



