PLATE IX 



This plate is designed to illustrate the bright coloration which distinguishes most 

 of the Antarctic Bdelloids. The brilliant red of the stomach of Philodina gregaria 

 and Callidina hctbita (Figs. 1 and 3) may give the impression of being overdone. 

 If we have not caught the precise shade of the red, it is not that it was lees vivid 

 than we show it. It was a deep, clear, pure crimson or ruby. When seen in large 

 mass the colour approaches blood-red, but by transmitted light it appears crimson 

 under the microscope. 



When we succeeded in reviving a few examples of Philodina gregaria and showed 

 them to a naturalist in London, he exclaimed, " Are they so red as all that." 



FIGURE 1. Philodina gregaria, lateral view, showing the red stomach and eyes, 

 small antenna, and two young. 



FIGURE 2. Adineta grandis, dorsal view, showing the brown colour deepest in the 

 alimentary tract. 



FIGURE 3. Callidina habita, dorsal view. The distinctive spurs of this variety are 

 shown, and the prominent foot-boss. 



