500 MEMOIES OF THE NATIONAL ACADEMY OF SCIENCES. 



Plate XIX. 



Metamorphosix of Alpheus heterochelis at Beaufort, North Carolina, drawn from nature by W. K. 



Brooks. 



Fig. 1. Ventral view of the larva immediately after hatching. 



Fig. 2. Side view of the same larva. 



Fig. 3. Dorsal view of the antennule of the same larva. 



Fig. 4. Ventral view of the antenna of the same larva. 



Fig. 5. Mandible of the same larva. 



Fig. 6. First maxilla of the same larva. 



Fig. 7. Second maxilla of the same larva. 



