n 



s the base. The spacic 3ntg/tion cavity f s.c .) 



contains i - -its on a curious tongue of protoe 



-ion on the left.. 



PI, I,, is a 1 



whose L 3. Its highest ceil 



of t] 

 x is slightly eccentrically placed, and one of > s A is 



_ , III,, is a c en- 

 tral section through a similar s itly older blasto 



targinal cells are sharply marked off frc 'iter 



Last f_o,j2..). The arc is high and round. On the left 

 three cells ar< from one of t] 



a tongue of protoplasm, fr a cell has been cut off, 



projects int I Voion cavitj . T 



torn off at t] si Lter redui 



of protop . ol.v adherent below, thus 



it the br 



i . i3 s •■ -■ sture by no means uncommon in t 



; ^iphostoma . It is a thirty- two- celled stage in 

 riblast has yet been formed. The cells .are in two lay- 

 ers ; che long ceil on t 1 right is nea to di- 

 vide, rnftath the whole is a thick layer of protop 

 in which three vertical cell walls extend downward and are 

 lost. Later transverse •vails wi or and cut these 



