CONTENTS OF VOL IX. 



No. i. JUNE, 1905 



PAGE. 



JEAN DAWSON : The Breathing and Feeding Mechanism of the Lampreys i 



ALBERT M. REESE: The Eye of Cryptobranchus .......................... 22 



J. E. DUERDEN : The Morphology of the Madrcporaria, VI. The 



Fossula in Rugose Corals ........... . ................................... 27 



CHAS. C. ADAMS : The Postglacial Dispersal of the North American 



Biota ....................................................................... 53 



No. 2. JULY, 1905 



HELEN DEAN KING: The Formation of the First Polar Spindle in the 



Egg of Bufo lentiginosus ............................................... 73 



JEAN DAWSON : The Breathing and Feeding Mechanism of the Lampreys 



II. ........................................................................... 91 



J. B. JOHNSTON : The Cranial and Spinal Ganglia and the Viscero- 



Motor Roots in Amphioxits ............................................ 112 



WILLIAM A. KEPNER : Pauline/la Chromatophora ......................... 128 



FRANCIS H. HERRICK : Torsionjf the Crustacean Limb .......... . ....... 1 30 



~ ~ v 



No. 3. AUGUST, ,905 a =^ 



LEO LOEB : Immunity and Adaptation ...................................... 141 



CHARLES ZELENY : The Regeneration of a Double Chela in the Fiddler- 



Crab ( Gelasinus pugilator) in Place of a Normal Single One ____ 152 



GRACE MEDES : The Spermatogenesis of Sen tiger a forceps ................. 156 



LILIAN V. MORGAN : Incomplete Anterior Regeneration in the Absence 



of the Brain in Leptoplana littoralis ................................... 187 



No. 4. SEPTEMBER, 1 905 



M. M. METCALF AND M. E. L. JOHNSON : The Anatomy of the Eyes 

 and Neural glands in the Aggregated Forms of Cyclosalpa doli- 

 chosoma-virgula and Salpa punctata ................................... 195 



HAROLD HEATH : The Excretory and Circulatory Systems of Crypto- 



chiton stelleri Midd ....................................................... 213 



iii 



