PLATE cm. 



PAGE 



Myliusia callocyathus. Gray, . . .354 



Fig. 1. A specimen with two oscula, preserved in alcohol; natural size. 

 Fig. 2. Inner view of half of a longitudinally bisected specimen ; natural size. 

 Fig. 3. Transverse section of the tube-wall (combination figure); x 60. 

 Fig. 4. Oxyhexact ; x 30U. 



Figs. 5, 6. Oxyhexasters with S-shaped terminal rays ; x 300. 

 Figs. 7, 8, 9. Discohexasters with S-shaped terminal rays ; x 300. 



