-.. 



of development at the tiiae of emerging is a family character- 

 istic. Looss 1 drawing (1896, fig. 92) olarly shews eg*?;- 

 of 'nqhinp storaura liliputanum in the one cell stage rif?ar the 

 genital pore. Usually the two sell (fig* 2) and the four 

 cell (fig* 3) stages are forraed within the first twenty -four 

 hours. during this time the yolk mas?? appears somewh t 

 cellular. It is m:\de up of two materials, one of opaque 

 granules, th oth^r of an oily and serai -trans pa rent fluid* 

 'Jh - granules ara prominent w.l nt this stage are numerous 

 and small. These two materials seem to be mixed with 



-!h othr roaming a medium whcse nature is difficult to show 

 in % 'it -4 wing. As the number rf sells of the niiraoidium 

 increase the ^r mules of ttie yol^ material collect into l;*rge 

 units but -?..^nin dg3re%ae in prominenog until by the twelfth 

 day they have aliaost disappeared. By the seventh day the 

 oily material his i'ormod many well defined globules (fig* ?} 

 On the seoonu c r Uiird day the eight, ten and twelve oell 

 tages are reached (fig. 4). On the fourth day about twenty 

 cells are represented (fig. 5). On the sixth day the number 

 of c.ells4i*ve inor eased to ^bout thirty {fig. 6), each oell 

 being somewhat smaller than in the stages where there are 

 fewer oel la Curing this time the embryo remains quite disti 

 from the yolV taans, " / lg tiie exaot boundary line is some- 

 times diffioult to determine. On the seventh day (fig* 7) 

 angular epithelial a el Is of the miraoidium are clearly die* 

 tinguishable. On the eighth day (fig* 8} t the condition 

 differs from the preceding day principally in the great 

 reduction of the granules of the yolk material* Also on 



