MUSEUM OF COMPARATIVE ZOOLOGY. 273 



17. A. S. Packard, Jr. The Development of Limulus Polyphemus. Me- 



moirs of the Boston Society of Natural History, Vol. II. p. 201, fig. 36. 

 1872. 

 (Forked caudal spine.) 



18. C. F. Gissler. Description of a Hermaphroditic Phyllopod Crustacean 



(Eubranchipus). The American Naturalist, Vol. XV. p. 136, fig. 1-3. 

 1881. 



(Eubranchipus vernalis, showing lateral hermaphroditism both in the 

 external claspers, etc. and in the internal genital organs. The internal 

 female organs are but poorly represented, — although a single egg was ob- 

 served in the ovarial string, — while the internal male organs have their 

 normal size and shape.) 



18 



