374 



DR F. A. BATHER. 



brachiole 



Fig. 6. 



Fig. 9. 



Fig. 7. 



Fig. 8. 

 Text-figs. 6-9. — Dendrocystis. 



Figs. 6, 8, 9, are reconstructions based on actual specimens, and of natural size ; they are grouped here to show at a 



glance the differences between the three species. 



Fig. 6. — D. Barrandei. Individuals of this species are usually smaller than the drawing. 



Fig. 7. — D. Barrandei. The region between anal lobe and stem in Brit. Mus. E 16102, showing the sugar-loaf plate and the 



elongate plates probably connected with the vent. Drawn with camera lucida from a squeeze, and enlarged about 



3 diameters. 

 Fig. 8. — D. S'edguieki. Note the umbonate plates between the anal and antanal lobes, and the elongate plates between the 



sugar-loaf plate and the stem. Some of the columnals in the distal region are broken and show the lumen. 

 Fig. 9. — D. scotica. Between anal lobe and stem, the plates of the vent form a projection. 



