12'2 GEORGE MATTHAI 



in the nieshwoik are probably transverse sections of longitudinal fibres, 

 being more numerous where the meshwork is less open. 



Fig. 17. — Larva of Favia fragum (Esp.) ten hours after extrusion. 

 Transverse section through stomodaeum. Four mesenteries have joined 

 stomodaeum ; their stomodaeal attachments are shown in figure. 



Fig. 18.- — ^Larva of Favia fragum (Esp.) ten hours after extrusion. 

 Part of transverse section through a ])rimary mesentery, showing filament. 



