CONTENTS OF VOL. XI. 



No. I. — May, 1895. 



Pages 



I. Bashford Dean. 



The Early Development of Gar-pike and 



Sturgeon 1-62 



II. J. Playfair McMurrich. 



Embryology of tJie Isopod Crustacea . . 63-154 



IIL Edward G. Gardiner, Ph.D. 



Early Development of Polychoems Caii- 



datus, Mark 155-176 



IV. Albro D. Morrill. 



The Pectoral Appendages of Prionotus 



and their Innervation 17 7- 191 



V. Fanny E. Langdon. 



The Sense-organs of Lnmbricns Agricola, 



Hoffm 193-234 



No. 2. — October, 1895. 



I. George Wilton Field. 



O71 the MorpJwlogy and Physiology of the 



Echinodei'ni Spermatozoon .... 235-270 



II. Gary N. Calkins. 



The Spermatoge7iesis of Lumbricus . . 271-302 



III. W. B. Scott. 



The Osteology ajid Relatio7is of Protoceras 303-374 



IV. Alvin Davison. 



A Coittribntion to the Anatomy and Phy- 



logeny of Aviphiiima Means {Gardner) 375-410 



