PLATE VI 



Figs. 1-9. Ehrenbergina crassa, Heron-Allen and Earland (No. 193): x 90. Figs, i, 2, 

 megalospheric ; edge views. Fig. 3, megalospheric ; ventral side. Fig. 4, 

 megalospheric; dorsal side. Fig. 5, microspheric ; ventral side. Fig. 6, 

 microspheric ; edge view. Fig. 7, microspheric; edge view of specimen in 

 balsam. Fig. 8, microspheric; ventral side of specimen in balsam. Fig. 9, 

 megalospheric ; ventral side of specimen in balsam. 



Figs. 10-15. Gordtospira fragilis, Heron-Allen and Earland (No. 33). Fig. 10, young 

 individual ; side view : x 40. Figs. 11, 12, aduh individuals; side views: x 30. 

 Fig. 13, adult individual; edge-oral view: x 30. Fig. 14, young individual 

 viewed as a transparent object to show the irregular coiling of the early 

 chambers; protoplasmic body dark: x 160. Fig. 15, young individual 

 viewed as a transparent object to show the irregular coiling of the early 

 chambers ; protoplasmic body dark : x 80. 



