PLATE 43. S 
Hyalonema (Hyalonema) agassizi LenpENFELD. 
_ Figures 1-7— form A, Station 4656. 
1.— The upper part of a stalk-spicule; reduced 1: 0.5; phot. Zeiss, anastig. 480/412 mm.: 
a, the portion represented in fig. 2; b, the portion represented in fig. 5; ¢, the portion SSPE 
sented in figs. 6 and 7; d, the soyton represented in figs. 3 and 4. 
2-7.— Parts of the stalk-spicule represented in fig. 1; magnified is phot. Zeiss, apochr. 16, compens. 
a oc. 6: ah 
2, 1 em. from the upper end (at a in fig. 1) focussed on the axial thecal : 
3, 4, 41 em. from the upper end (at d in fig. 1); 
3, focussed lower, on the axial thread; 4, focussed higher, on the upper surface; 
5, 20 em. from the upper end (at b in fig. 1) focussed on the axial thread; 
6, 7, 29 cm. from the upper end (at ¢ in fig. 1); ss 
6, focussed lower, on the axial thread; 7, focussed higher, on the upper surface. = 
Le 
a 
