126 THE ANATOMY OF INVERTEBRATED ANIMALS. 



Fig. 2%—A, Diphyes appendiculata.—a, hydranths and hydrophyllia on the hydrosoma ; 

 6, proximal nectocalyx ; c. aperture of distal nectocalyx; c/, somatocyst; e, pro- 

 longation of tht: 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 (through which the bris- 

 tle a id 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/ 



A^r ^^^ DiphyzoOid (Sphenoides). lateral and front views. C, DiphvzoCid of 

 AOyla (CiWoides). a,e. g<moj)hore or reproductive or^ran ; *, hvdranth- c phyl- 

 locyst or cavity of hydrophyllium, wiih its process (c/). D, free gouophore, its 

 manubrmm (a) containing ova. 



1 The species of Cejjhea, the anatomy of which is here ^iven, was obtained 

 in the Soutli Pacific, near the Louisiade "Archipelago, on the 11th of July, 1849. 



