THE WHEEL ANIMALCULES (ROTATORIA) 613 



ii5 (112) Without lorica. With spine-like or limb-hke appendages. No 

 foot Family Pedalionidae . . 116 



116(117,118,119) Appendages, two, very long Pedeks Gosse. 



Representative species (Fig. 943) Pedetes saltalor Gosse. 



117 (116, n8, 119) Appendages, three, spine-like. . Tmr/^ra Ehrenberg. 



Two or three species. 



Representative species (Fig. 944, A). . Triarthra longiseta Ehrenberg. 

 (Fig. 944, 5) r. Jmc/(ioto Rousselet. 



118 (116, 117, iig) Appendages, four; spines or bristles. 



Tetramastix Zacharias. 



One species only (Fig. 945). . . Tetramastix opoliensis Zacharias. 



119 (116, 117, n8) Appendages, six, branching, somewhat crustacean-like. 



Pedalion Hudson. 



Two species. 



Representative species (Fig. 946). . , . Pedalion mirum Hudson. 



120(111) Body spherical, no foot Family Trochosphaeridae, 



One genus only. ... Trochosphaera Semper, 



Representative species (Fig. 947). . Trochosphaera solstitialis Thoipe 



