FoLsoii. — Development Anurida. 



PLATE 3. 



Fig. 11. Ventral aspect of cephalic region of germ band at Stage 3. X 480. 



Fig. 12. Ventral aspect of ceplialic region of germ band at Stage 4. X 480. 



Fig. IS. Sagittal section of labrum at Stage 3. X 762. 



Fig. 14. Transection of germ band at the labial segment in Stage 3. X "62. 



Fig 15. Transection of germ band at the first maxillary segment in Stage 3. X 762. 



Fig. 16. Transection of germ band at the mandibular segment in Stage 3. X 762. 



Fig. 17. Posterior aspect of left first maxilla at Stage 3. X 480. 



Fig. 18. Posterior aspect of left second maxilla at Stage 3. X 480. 



Fig. ly. Left aspect of germ band at Stage 4. X 480. 



Fig. 20. Left aspect of cephalic region at Stage 5. X 480. 



Fig. 21. Ventral aspect of cephalic region at Stage 5. X 480. 



Fig. 22. Posterior aspect of left first ma.xilla at Stage 5. X 480. 

 The last three figures are from the same preparation. 



