Figure 3-4. — Portion of chorion of fourbeard rockling egg as seen under oil immer- 

 sion lens (100 x) of light microscope. Chorion has been removed from egg. 

 Postspill day 4. 



Figure 3-6.— Portion of chorion of fourbeard rockling egg showing deterioration 

 and absence of any pore structure. (100 x immersion objective, Hght microscope). 

 Postspill day 4. 



Figure 3-5. — Photographic enlargement of chorion of fourbeard rockling egg seen 

 in Figure 3-4. Regularly spaced black dots are membrane pores (1,000 x ). Postspill 

 day 4. 



Figure 3-7. — Photographic enlargement of portion of chorion of fourbeard rock- 

 ing egg showing deterioration and absence of any pore structure (100 x oil immer- 

 sion objective, light microscope). Postspill day 4. 



Figure 3-8. — Intact, undissected fourbeard rockling egg as 

 prepared for examination of chorion in scanning electron 

 microscope and as observed in its entirety under low-power 

 magnification of scanning electron microscope. Pore structure 

 is absent. Lightly shaded portions of egg might represent 

 chorion lesions (1,000 x). Postspill day 2. 



24 



