CONTENTS OF VOL IV. 



No. i. DECEMBER, 1902 



PAGE. 



G. T. HARGITT: Notes on the Regeneration of Gonionema i 



CHAS. W. HARGITT : Notes on a Few Medusa New to Woods 



Holl 13 



WALTER S. BUTTON : On the Morphology of the Chromosome 



Group in Brachystola magna 24 



IDA H. HYDE : The Nervous System in Gonionema Murbachii.... 40 



No. 2. JANUARY, 1903 



HAROLD HEATH : The Habits of California Termites 47 



J. H. ELLIOTT : A Preliminary Note on the Occurrence of a Fi- 



laria in the Crow 64 



MARY J. Ross : The Origin and Development of the Gastric 



Glands of Desmognathus, Amblystoma and Pig 66 



H. F. THATCHER : A Preliminary Note on the Absorption of the 



Hydranths of Hydroid Polyps 96 



No. 3. FEBRUARY, 1903 



AXEL LEONARD MELANDER : Notes on the Structure and Devel- 

 opment of Embia texana 99 



W. R. COE AND B. W. KUNKEL : A New Species of Nemertean 



{Cerebratulus melanops} from tJie Gulf of St. Lawrence.. 119 



R. P. COWLES : Notes on the Rearing of the Larvce of Polygor- 

 dius appendicnlatus and on the Occurrence of the Adult on 

 the Atlantic Coast of America 125 ^ 



ARTHUR W. GREELEY : On tJie Effect of Variations in tlie Tem- 

 perature Upon the Process of Artificial Parthenogenesis 129 



WILLIAM MORTON WHEELER : Erebomyrma, a New Genus of 



Hypogceic Ants from Texas 137 



No. 4. MARCH, 1903 

 W. M. WHEELER AND J. F. MCCLENDON : Dimorphic Queens 



in an American Ant {Lasius latipes IValsli) 149 



RALPH S. LILLIE: Fusion of Blastomeres and Nuclear Division 



without Cell- Division in Solutions of Non-Electrolytes 164 



CHARLES T. BRUES : The Structure and Significance of Vestigial 



Wings among Insects 179 



iii 



