478 MEMOIRS OF THE NATIONAL ACADEMY OF SCIENCES. 



PLATE VIII. 



FIG. 17. Second larva after second molt. L=- 1 ^ L - in. x 70. 



FIG. 18. Left mandible, outer side, of second larva, x 276. 



FIG. 19. First maxilla of second larva, x 276. 



FIG. 20. Telson of second larva, seen from below, x 70. 



FIG. 21. Left second maxilla of second larva, seen from the outer side. x276. 



FIG. 22. Eight first maxilliped of second larva, seen from the outer side, x 276. 



REFERENCE LETTERS. 



g g, gastric gland. 



.... the dotted line in Fig. 20 pointt* to the outer Hpine, the equivalent of d, Fig. 11. 



