INTRODUCTION. 



Ivii 



Genera. 



iCalycles united towards the base 

 by a cellular mass COPPINIA. 



Calycles scattered 10 



ICalycles rudimentary (exceedingly 

 short cylinders) TIMCHYDHA. 



Calycles not rudimentary LAFOEA. 



Without nematophores 12 



With nematophores 18 



[Calycles cylindrical, and disposed 

 jo J in longitudinal rows on all sides 



' 1 of the stem SALACIA. 



( Calycles otherwise disposed 13 



iCalycles decumbent, scatteredalong 

 a creeping fibre (no erect stem).. FrLELLUM. 



Calycles arranged in series along 

 the stem and branches 14 



I , ( Calycles unilateral HYDRALLMANIA. 



' | Calycles biserial 15 



lg | Calycles immersed THUIABIA. 



' } Calycles not immersed 16 



Calycles decidedly alternate, with 



a prominent operculum SERTULAEELLA. 



Calycles without external oper- 

 culum 17 



(Gonothecse (female) with a cleft 



J margin and internal marsupium . DIPHASIA. 



1 Gonothecse with a plain orifice and 



( without marsupium SERTULARIA. 



I With verticillate branchlets ANTENNULARIA. 



I Without verticillate branchlets . . 19 



(With a mesial neniatophore at- 



n a J tached to the front of the calycle 



1 Without a mesial uematophore at- 



( tached to the front of the calycle 



AGLAOPHENIA. 



PLUMULARIA. 



CLASSIFICATION. 



It would be a fruitless labour to give any detailed 

 account of the earlier systems of classification, which have 

 now only an antiquarian interest. Those who are curious 



