I 



PLATE 46. 



Hyalonema (Hyalonema) agassizi Lendenfeld. 

 Figs. 1-5, 9, 12, 13 — form A, Station 4656. 



1-16. — Macramphidiscs; magnified 500: 



1, 3-11, 14-16, phot. Zeiss, apochr. 4, compens. oc. 6; 



2, 12, 13, u. V. phot. Zeiss, q. monochr. 6, q. oc. 7: 



1, an adult normal small macramphidisc of form A; 



2, an adult normal large macramphidisc of form A; 



3, 4, an adult normal large macramphidisc of form A; 



3, focussed high; 4, focussed lower; 



5, an adult normal large macramphidisc of form A; 



6, an adult normal large macramphidisc of form D; 



7, an adult abnormal spiny large macramphidisc of form D; 



8, a young normal large macramphidisc of form D; 



9, a young normal large macramphidisc of form A; 



10, 11, adult normal large macramphidiscs of form C; 

 12, 13, adult normal large macramphidiscs of form A; 

 14, 15, adult normal large macramphidiscs of form B; 

 16, an adult normal large macramphidisc of form D. 



Figs. 6-8, 16 

 Figs. 10, 11 

 Figs. 14, 15 



form D, Station 3684 (A. A. 17). 

 form C, Station 4740. 

 form B, Station 4651. 



