REPORT ON THE CALCAREA. 



31 



l/tihardia, n. gen. 



Teichouidse of calyciform shape; that surface which carries pores supported by 

 triradiate and minute acerate spicules, that which bears oscula supported by large 

 acerate spicules. 



EILHARDIA 



LEUCETTA 



AMPHORiSCUS 



TEICHONELLA 



SYCON 



LEUCOSOLENIA 



/QLYNTHUS 



I have now finished my account of the genera ; their conjectural mutual phylogenetic 

 affinities may be expressed graphically by the above diagram. 



The first half of my task is therewith accomplished, and the best conclusion I can 

 give to it will consist in signalising the merits of the investigator whose name has been 



