406 
THE AMERICAN NATURALIST. 
LITERATURE €ITED. 
AvERS, W. O. Proc. Bost. Soc. Nat. Hist. 
.Lripv, J. Marine Invertebrates of New Jersey and Rhode Island. 
McCrapy. Proc. Elliott Soc. Nat. Hist. 
AGASSIZ, L. Cont. Nat. Hist. U. S. Vol. iv. 
AGASSIZ, A. North American Acalephe. 
ALLMAN, J. G. Gymnoblastic Hydroids. 
VARENNE, A. DE. Recherches des Polypes Hydraires. 
WiLSON, E. B. Variation in Yolk Cleavage of Renilla. Zool. An- 
zeiger. 
WILSON, E. B.. Development of Renilla. PAilosophical Trans. 
METSCHNIKOFF, E. Embryol. Studien an Medusen. Wien. 
Hickson. Early Stages in the Development of Distichopora violacea. 
Quart. Journ. Micr. Sci. 
LoEB, J. Physiological Morphology. Biol. Lect. 
BUNTING, M. The Development of Hydractinia. Journ. of Morph. 
DorLEIN, F. J. Die Eibildung bei Tubularia. Zeitschr. f. wiss. 
Zool. 
NorMAN, W. W. Segmentation of Nucleus without Segmentation of 
Protoplasm. Arch. f. Entwick. d. Organismen. Bd. iii. 
CONKLIN, E. G. The Embryology of Crepidula. Journ. of Morph. 
Vol. xvi. 
ANDREWS, E. A. Ectosarcal Phenomena in Eggs of Hydra. Johns 
Hopkins Univ. Circ. November. - 
Logs, J. On the Nature and Process of Fertilization, etc. Amer. 
Journ. of Phys. 
SMALLWOOD, M. Morphology of Pennaria. American Naturalist. 
