GILL SHAPES. 



PLATE IV. 



FIG. 1. 

 2. 

 3. 

 4. 



5. 

 6. 

 7. 



8. 



GILLS AS VEINS ; CAP INFUNDIBULIFORM. FIG. 9. 



GILLS BOUNDED IN FRONT (anteriorly.) 10. 



GILLS ROUNDED BEHIND (posteriorly.) 11. 



GlLLS LANCEOLATE. 12. 



GILLS VENTEICOSE. 13. 



GILLS UNEQUAL ; CAP CONVEX. 14. 

 GILLS ADNEXED. 



GlLLS EMARGINATE, ALSO ADNATE AND 15. 

 HAVING DECURRENT TOOTH. 



GlLLS SERRATE. 



GILLS FLEXUOSE; WAVED. 

 GILLS DICHOTOMOUS. 

 GILLS FREE ; CAP BROADLY UMBONATE, 

 GILLS NARROW : CAP MARGIN REFLEXED. 

 GlLLS SLIGHTLY ADNEXED | CAP UMBO- 

 NATE ; MARGIN INVOLUTE. 

 GlLLS DECUEKENT ; CAP UMBILICATE. 



