blastomeres, four i 



inal ceils". ~ T ov; untrue this is fo .Mice 



i ile shown 



x e .. 



ntation. 

 ttors ar< .. . .. ology be. 



the first and second fur-rc i t '"" a. Dhibian eggs, 



but whether o£ not the third furrows correspond is a ver; 

 bated question* 



- T of fmarmf '61) fi scribed in pelagic fishes 



the first s ition as < ., dividi from 



periblast; but, later f his error am 



clared that in SaL:ii- i furrow is equator! 



i rd furrow in rout 



is equatorial and divides or from eight lower cells, 



the latter not being as yet off from a periblast, 



Rauber f *83 ) made a careful study of the subject bas 

 rn fact, th Lbian furrow in 



c as e s is not t ru I . bu t avo i . 



forms many structures L . , PI, I, He con- 



cludes that the first equatorial furrow of the frog has been 

 lost in the Tele, aorizes t teleostean 



