434 
MR. T. H. HUXLEY ON THE AFFINITIES OF THE MEDUSA. 
Fig. 42. Free-swimming ovarium of Coryne (from Steenstrup) to compare with 
fig. 41. 
Sertularidce. 
Fig. 43. Cell of Plumularia ? 
a. Peculiar clavate organs. 
b. Large thread-cells. 
Fig. 44. Cell of another Plumularia, letters as before. 
Fig. 45. Ovarium of fig. 43. 
a. Organs containing thread-cells similar to fig. 43 a. 
b. Ova. 
Fig. 46. Section of Plumularia. 
Fig. 47 . Section of Polygastric Diphyes. 
Fig. 48. Section of Rhizostoma. 
Fig. 49. Section of Monostome Medusa. 
