DEVELOPMENT OF AGARICIA. 511 



Description of Plates. 



Plates 1-6. Development of Agaricia fragilis. All, except top and bot- 

 tom figures of Plate 5, are photomicrographs of transverse sections of free 

 swimming larvae. X 175. 



Plate 1. Larva A, upper photograph, section 15; lower, section 24. 



Plate 2. Larva A, upper photograph, section 30; lower, section 46. 



Plate 3. Larva F, upper photograph, section 12; lower, section 17. 



Plate 4. Larva F, upper photograph, section 61 ; lower, section 73. 



Plate 5. Two middle figures are of Larva I, the left (C) being section 19; 

 the right (D), section 26. The top figure (A) is a photograph of skeleton A, 

 the bottom one (B) of skeleton C. 



Plate 6. Larva I, upper photograph, section 73; lower, section 93. 



