478 MEMOIRS OF THE NATIONAL ACADEMY OF SCIENCES. 



Plate VIII. 



Fig. 17. Second larva after second molt. 'L—-f^g in. x 70. 



Fig. 18. Left mandible, outer side, of second larva. x27C. 



Fig. 19. First maxilla of second larva, x 27G. 



Fig. 20. Telson of second larva, seen from below. x70. 



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. x27G. 



REFERENCE LETTERS. 



g g, gastric gland. 

 .... the dotted line iu Fig. 20 points to the outer spiue, the equivalent of d, Fig. 11. 



