Pig. 78. Diagrammatic T.S. through branchial basket of Anisopterid larvae, 

 to shew types of gill-system. A. Undulate Simplex. B Foliate Duplex, 

 c. Lamellate Duplex, bp basal pad; Br branchial basket; cf cross-fold; 

 DT dorsal trunk ; ef t primary, e/ 2 secondary efferent ; fl foliae ; lam lamellae ; 

 mf main-fold; VT visceral trunk. In c, only one lamella is shewn cut in 

 each hemibranch, although six or more are really cut (see fig. 83 B). The 

 dotted tracheae lie outside the true level of the section. Original. 



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