486 MEM<JIB8 OF THE NATIONAL ACADEMY OP SCIENCES. 



Plate XII. 



Fig. 35. Older larva, taken in the tow-net outside of Nassau Harbor May 7, 1887. L=9""'". L. 

 of eye- stalk =2°'™. L. between eyes=4.7'"". x 15. The long flagella of the antenn.t 

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

 behind the animal as it swims through the water. 



