PLATE 77. 



Hyalonema (Prionema) agujanum lata Lendenfeld. 

 Figures 1-10. 



1. — The greater part of the shaft and one terminal anchor of a macramphidisc; magnified 500; phot. 



Zeiss, apochr. 8, compens. oc. 12. 



2, 3. — Half (one terminal anchor) of an ordinary, large serrated mesamphidisc; magnified 500; phot. 



Zeiss, apochr. 4, compens. oc. 6: 

 2, focussed higher (on the uppermost teeth); 3, focussed lower (on the shaft). 

 4, 5. — All ordinary, small serrated mesamphidisc; magnified 500; phot. Zeiss, H. I. apochr. 2, compens. 

 oc. 6: 



4, focussed higher (on the uppermost teeth); 5, focussed lower (on the centre of the shaft). 

 6, 7. — A large, broad-anchored mesamphidisc; magnified 500; phot. Zeiss, apochr. 8, compens. oc. 12: 

 6, focussed higher (on the uppermost teeth); 7, focussed lower (on the centre of the shaft). 



8. — Micramphidisc; magnified 500; phot. Zeiss, apochr. 4, compens. oc. 12. 



9, 10. — Apical view of a terminal anchor of a macramphidisc; magnified 500; phot. Zeiss, apochr. 8, 



compens. oc. 12: 



9, focussed low (on the tips of the teeth) ; 10, focussed high (on the web connecting the teeth basally). 



