486 MEMOIRS OF THE NATIONAL ACADEMY OF SCIENCES. 



PLATE XII. 



FIG. 35. Older larva, taken iu tbe tow-net outside of Nassau Harbor May 7, 1887. L=9 mni . L. 

 of eye-stalk=2'" m . L. between eyes=4.7 rai ". x 15. The long flagellaof the antenna- 

 are conventionally represented to bring them into the plate. They trail above and 

 behind the animal as it swims through the water. 



