62 



ZOOLOGY 



ii ,""Vi 



Si 



Jl — 



//A,— "-: 



Pig. 4 j.— Aulactinium actinastrum. c. calymnia ; fan. central capsule ; n. nucleus ; op 

 operculum ; ph. phseodium. (From Lang's Comparative Anatomy, after Haeckel.) 



cent, caps 



Fio. I. Actinomraa asteracanthiou. A, the shell with portions of the two outer 

 spheres broken away ; B, section showing the relations of the skeleton to the animal ; 

 cent. caps, central capsule ; ex. caps. pr. extra-eapsular protoplasm ; ntt. nucleus ; sk: 1, outer, 

 sh. 2, middle, sk. 3, inner sphere of skeleton. (From Butschli's Protozoa, after Haeckel and 

 Hertwig.) 



