2l8 GUYER. [Vol. II. 



they are very characteristic deeply staining round bodies. In 

 the abnormal form, if present, they were generally small and 

 irregular. Occasionally they appeared as pale, uneven masses, 

 which seemed to be disintegrating. 



Centrosomes were frequently present, and were always closely 

 connected with the sphere substance. In none of the eggs was 

 mitotic division found in progress. Pig. 6 shows two centro- 

 somes if) lying side by side in the midst of a system of radiat- 

 ing fibers. The sphere substance is 

 collected for the most part into two 

 more or less crescentic areas at either 

 side. The centrosomes proper were 

 surrounded each by a small clear space, 

 and then by a darker area of what ap- 

 peared to be sphere substance. Out- 

 side this latter region came the system 

 of fibers. The nucleus had the charac- 

 teristic shrunken appearance. Another 

 -. , . , . Q.°[,z was found in which two centro- 



FiG. 6. — X 135. An egg showing oo 



two centrosomes (<:). /, follicle ; somcs, cach surroundcd by a mass of 



«, nucleus; i, sphere. . . 



sphere substance, were lymg on either 

 side of the nucleus, but no trace of a spindle or other prepara- 

 tion for mitosis was visible. In Fig. 2 a single centrosome (c) 

 is seen. 



Another common phenomenon shown by many of the eggs 

 was the destruction of the cytoplasm by means of phagocytes 

 or eating cells. There were two methods of consumption by 

 such cells. Either they wandered into the interior of the cell 

 and gradually devoured the material about them, or they multi- 

 plied around the periphery of the Qgg and gradually crowded in 

 upon the cytoplasm, consuming it as they approached the center. 

 The first method was rare, being seen in only three or four 

 eggs, and then to a limited extent. This is unlike the cases 

 described by Brandt ('89) and Willey ('91), where this type of 

 yolk resorption seemed to be common {cf. Brandt, '89, Figs. 

 5-8 ; also Willey, '91, Figs, i and 2). 



The second process was the usual one. There were scarcely 

 any of the larger eggs that did not display it to a greater or less 



