46 TRANSACTIONS LIVERPOOL BIOLOGICAL SOCIETY. 



Plate II. 



Fig. 1. Section 81, showing cardiac and pyloric sacs of 



stomach, &c. 



Fig. 2. Section 95, showing junction of lobes of testis. 



Fig. 3. Section 103, showing intestine leaving stomach. 



Fig. 4. Section 113, showing diverticulmii of rectmn, &c. 



Fig. 5. Section 125, showing branchial sac, heart, &c. 



Fig. 6. Section 134,) showing the narrow opening of the 



Fig. 7. Section 151, J intestine into the rectmn. 



Plate III. 



Fig. 1. Section 155, showing the beginning of the tail. 



Fig. 2. Section, 163, showing the anterior end of the 

 stomach. 



Fig. 3. Section 165,\ 



Fig. 4. Section 167, showing the structm^e of the stig- 



Fig. 5. Section 169 r mata. 



Fig, 6. Section 183,, 



Fig. 7. Section 190, showing the branchial sac in front 

 of the stigmata. 



Fig. 8. Section 216, showing the large lateral ectoderm 

 cells. 



Fig. 9. Part of tail from last section more highly mag- 

 nified (X 600). 



Fig. 10. Ectoderm cells from about section 200, highly 

 magnified. 



Plate IV. 



showing the relation of the endo- 

 style to the branchial sac. 



Fig. 1. Section 223,^ 

 Fig. 2. Section 225, 

 Fig. 3. Section 228,^ 

 Fig. 4. Section 248, showing anterior csecal part of 

 endostyle, &c. 



