FIRST ZOEA OF PORCELLANA. G3 



FIGURE 1. Continued. 



A, first antenna; An, second antenna; M, mandible; 

 Mp, first maxilliped; Mp f , second maxilliped; R, 

 rostrum ; T, telson. 



FIGURE 2. First antenna of the same larva, more highly magnified. 

 From a drawing by W. K. Brooks. 



FIGURE 3. First maxilla of the larva shown in Figure 5. From a 

 drawing by W. K. Brooks. 



a, proximal joint of basal portion; b, distal joint of 

 basal portion ; c, endopodite. 



FIGURE 4. Second maxilla of the larva shown in Figure 5. From a 

 drawing by W. K. Brooks. 



a, three-jointed basal portion ; 6, two-jointed endo- 

 podite ; c, scaphognathite; d, flagellum. 



FIGURE 5. Zoea, seen from the right side, immediately after moulting 

 the embryonic skin. From a drawing by E. B.Wilson. 

 A, first antenna; An, second antenna; Mp, first max- 

 illiped; Mp' , second maxilliped; R, rostrum. 



FIGURE 6. Ventral view of the same zoea, one day after moulting the 

 embryonic skin. From a drawing by E. B. Wilson. 

 A, first antenna; An, second antenna; L, labrum, M, 

 mandible; Mp, first maxilliped; Mp' , second maxilli- 

 ped; MX, first maxilla; MX', second maxilla; R, ros- 

 trum ; T, telson. 



FIGURE 7. Dorsal view of right half of telson of the larva shown in 

 Figure 1. From a drawing by E. B. Wilson. 



FIGURE 8. One of the seta? of Figure 7, more highly magnified. 

 From a drawing by E. B. Wilson. 



PLATE VII. 



FIGURE 1. Second antenna of the larva shown in Plate VI, Figure 1. 

 From a drawing by W. K. Brooks. 

 a, embryonic skin ; b, external branch ; c, internal 

 branch ; d, enlarged basal joint. 



FIGURE 2. Second antenna of the zoea shown in Plate VI, Figure 5. 

 From a drawing by W. K. Brooks. Letters of refer- 

 ence as in Figure 1. 



FIGURE 3. First antenna of the zoea shown in Plate VI, Figure^- ; 

 From a drawing by W. K. Brooks. 



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