IV CONTENTS 



Oliver P., Hay. On the phylogeny of the shell of the Testudinata and the 

 relationships of Dermochelys. One text figure and two plates 421 



Alden B. Dawson. The cloaca and cloacal glands of the male Xecturus. 



Three plates (sixteen figures) 447 



Hope Hibbard. Cytoplasmic inclusions in the egg of Echinarachnius parma. 



One text figure and four plates (twenty-four figures) 467 



No. 4. SEPTEMBER, 1922 



Caroline Burling Thompson. The castes of Termopsis. Nine text figures and 



two plates 495 



D. L. Gamble. The morphology of the ribs and transverse processes in Nec- 



turus maculatus. Thirty-one figures 537 



George H. Bishop. Cell metabolism in the insect fat-body. I. Cytological 



changes accompanying growth and histolysis of the fat-body of Apis mellifica. 



Six text figures and three plates (thirty-six figures) 567 



