100 



HYDKOZOA. 



size, extending far beyond the margin of the short 

 gonocalyx. In other genera the reverse is usually 

 the case, the manubrium being shorter than the 

 swimming cup within which it is suspended. Each 

 gynophore, when fully developed, appears to con- 

 tain several ova. In most CalycophoridcB, except 

 Diphyes itself, both male and female reproductive 

 appendages appear on the same hydrosoma. 

 Four families of Calycophoridce have been de- 

 Professor Huxley. Their characters we 



subj oin. 



Order CALYCOPHOKID.E. 



Family i. DiPHYDiE. 



Calycophoridce with not more than two, 

 polygonal, nectocalyces. Proximal hydrcecium 

 complete. Hydrophyllia. 

 Family 2. Spileronectid^e. 



Calycophoridce with probably not more 

 than two nectocalyces; the proximal one 

 being spheroidal, with a complete hydrcecium. 

 No hydrophyllia? 

 Family 3. Pratidje. 



Calycophoridce with only two nectocalyces, 



whose hydroecia are both incomplete. Hy- 

 drophyllia. 

 Family 4. Hippopodiid^e. 



Calycophoridce with many nectocalyces, 

 whose hydroecia are incomplete. No hydro* 

 phyllia. 



The same naturalist has proposed the distinctive 

 term of ' Diphyozooids ' for those singular detached 

 reproductive portions of adult Calycophond® 

 which received the name of " monogastric Difhf 







