PLATE XII 



FIGURE 9a. Adineta barbata, Janson ? 



FIGURE 96. Egg of the same from Blue Lake ; one pole is produced, and there are 



no other processes. 

 FIGURE 9c. Egg from Deep Lake, Cape Barne, from which a similar Adineta was 



hatched on September 24, after the egg had been dry for about a year, and had 



been conveyed from Antarctica to Britain. 

 FIGURE 10a. Adineta grandis, large stout example, showing six young, apparently 



all in an equally advanced state of development, and with the jaws well grown. 

 FIGURE 106. Head of the same, ventral surface, showing the lamellse, brush of 



cilia and motile setse, pectinate folds at posterior margin of corona, &c. 

 FIGURE lOc. Jaw of the same, showing the projection at back of ramus. 

 FIGURE Wd. Yolk-mass of the same, dividing into six parts, each containing one 



nucleus. The number of nuclei is normally eight, as in moat Bdelloids. In this 



instance the full number may be present, two of them hidden behind the centre 



of the mass. 

 FIGURE lla. Adineta longicornis ? The rostral part is not of the same form as in 



the type, but allowing for a different angle of inclination it may be the same. 

 FIGURE 116. Spurs of the same. They are considerably shorter than in the type, 



but are still relatively much longer than in any other known species. 

 FIGURE 12a. Callidina angularis, sp. n., dorsal view, showing angular outline and 



stippled surface. 

 FIGURE 126. Jaw of the same, with four principal teeth and many finer ones 



diminishing backwards. 



FIGURES 12cand I2d. Eggs found associated with this species and with G. constricta. 

 FIGURE 13a. Callidina constricta, Duj., dorsal view, illustrating the differences 



between this species and G. angularis ; the outline is not angular and the skin 



is not stippled. 

 FIGURE 136. Part of one disc of the corona of C. constricta, showing the groups ot 



cilia which give the appearance of toothed wheels to the philodinoid corona. 



Diagrams elucidating the motions of the cilia which cause the appearance of 



teeth have often been published. This is not a diagram, but a drawing from an 



example which had just been killed and fixed with osmic acid while in the act 



of feeding. Each group has cilia at every stage of the stroke, thus showing the 



course followed by each. The specimen was mounted in fluid and preserved. 



Unfortunately, as was only to be expected, the slight difference of density between 



the fluids within and without the body has resulted in making the disc turgid and 



opened out the groups of cilia into one uniform fringe. 



