Foisom. — Development Anurida. 
PLATE 5. 
. Ventral aspect of head, represented as if transparent, at Stage 7. 480. 
. Anterior aspect of mouth-parts at Stage 7. From the same preparation 
as Figures 24 and 29. »X 480. 
. Paramedian section of head at Stage 7. X 480. 
. Ventral aspect of left maxilla at Stage 7. X 762. 
3. Dorsal aspect of adult head.  X 45. z 
. Anterior aspect of mouth at Stage 8. x 480. 
