mr.tior of r sharelpss ar.d grotesaue riass of blastOTores in 

 v/hich the cells are frequently held together very lO'-noly. 

 Tlie accorpanyinr drav.'ings unfortunately rer)re3ent only the 

 nost regular forms. This is due in part to the fact that 

 the very irregular forns v.-ere at first thought, as stated 

 before, to be abnornal; a-id partly because it v/as diffir.ult 

 to rake accurate carera sketches of these shapeless rasses 

 during life v/hile cleavages v/ere fc iS^ r lace rather raridly. 



'..hether these enbryos "ultinly by division, as .:etschni- 

 koff stated to be the case with Oceania ar^n ata and to ;hich 

 he attributed in part Lhe caus: of their peculiar shapes, 

 I have no direct evidence; but thirk that it is very prob- 

 able that such may be the care, ts^ frecuer.tly the blasto- 

 mercs are separated into tv;o distinct masses t eld together 

 by a small isthmus of cells} even if they do not divide by 

 an internal activity, they must, occasionally at least, be 

 broken ar)ar^ by ^he action of the tides v/hen in the open ocean, 

 Several tires the experiment of dividing the egg during the 



