| OCR Text |
Show 122 this to 168 hours of incubation, nuclei scattered in the 156 one pycnotic Three germ band The other embryos of somewhat somewhat were composed was columnar underlain in places with typical band (Plate X, Figure 5)0 normally developed and fitures mitotic These 151 embryos of hours It from fered is a of migration and latter or be most one amnion and of embryos the serosa germ two or were exhibited to 155 and fragmentary data first of group embryo the of thought their to 139 to the into the of yolk normal the yolk. in a pos suf normal death of the genetic or in great similarity all tendency to form vesicles with surface of not embryos represent striking characteristic invaginated sharply been environmental are is which prevented the because group, their contrasts on the defects or viability embryos is to The layer cellso appeared cytologically healthyo such may have The tive ectodermal cells inner energids and resulted in early the nature. The of that suggested defect cause mutant. otherwise analysis The continued cells structure. development. embryo. and the The in similar fixed when between 103 were Reliable sible. reticular yolk. widely invaginated into the yolk in was places contained minute a lethal these in the semivesicle. development of the defec yolk This insect |
