126 



THE ANATOIY OF INVERTEBRATED ANIMALS. 



-A. 



FiG.22.— ^, Diphyesappendiculata.—a, hydranths and hydropliylliaon thehydrosoma 

 6, proximal nectocalyx ; c, aperture of distal nectocalyx; d, somatocyst; e, pro 

 longation of the distal nectocalyx, by which it is attached to the hydrosoma 

 /, point of attachment of the hydrosoma in the cavity, or hydroecium, of the proxi 

 mal nectocalyx. B, the distal nectocalyx with the canal (throuijh which the bris- 

 tle a is passed), which is traversed by the hydrosoma in A. C\ extremity of the 

 distal nectocalyx, with its muscular velum. 



which are traversed by canals which unite, pass through the 

 pillars, and open into the central cavity of the umbrella/ 



Fig 23.— J, ^, Diphyzo5id (Sphenoides), latern] and front views. C, DiphvzoCid of 

 Abi/la (Cuboides). a^e. 2ono])hore or reproductive orL^an ; '), hvdranth; c, phyl- 

 locyst or cavity of hydrophyllium, wilh its process (rf). Z>, free gouophore, its 

 manubrium (a) containing ova. 



» The species of Cepliea, the anatomy of which is here given, was obtained 

 in the South Pacific, near the Louisiade Archipchigo, on the Uth of July, 1849. 



