BRTOZOA FROM FRANZ-JOSEF LAND. 188 



EXPLANATION OF THE PLATES. 



Plate 19. 



Fig. L Diastopora intricaria, Smitt. Dorsal surface of the zoarium. The 

 shape of a lamina is seen at the right-hand side, as it is partly turned 

 sideways. Natural size. From off glacier between Cape Flora and 

 Cape Gertrude, about 30 fathoms, {ov) ovicell. 



2. Do. ; natural size. Two lamina. From lat. 77° 55' N., long. 55° 25' E. 



3. Do. ; natural size. End of branch, corresponding in shape with Creta- 



ceous fossils figured by d'Orbigny. 



4. Do. Dorsal surface, X 12. The ovicell is seen from the side, and to 



the left there is the extremity of a young lateral branch. From 

 50 miles N.W. of Cape Mary Harmsworth, 234 fathoms ; Aug. 8th, 

 1897. 



5. Do. Anterior edge of a lamina, showing the length of the zooecial 



tubes, which extend at right angles to the two surfaces, X 12. Same 

 colony as fig. 4. 



6. Do. Ovicell with one oceciostome, and at the upper part of the ovicell 



the base of a lateral branch is enclosed, x 12. Off glacier between 

 Cape Flora and Cape Gertrude, 30 fathoms ; July 21st, 1897. 



7. Do. The end of a zooecium and of an adventitious tubule, both with 



closures. From the ovicell fig. 6. X 85. 



8. Do. Showing the zooecia with perforated closures, and also the position 



of the adventitious tubules, X 25. 



9. Do. Calcareous longitudinal section, showing the outer calcareous 



wall beyond the zocecia, X 25. 



10. Do. Transverse section of the same colony as fig. 9, X 25. 



11. Do. Section of lobe (a) of the ovicell fig. 12, X 85. 50 miles N.W. 



of Cape Mary Harmsworth, 234 fathoms ; Aug. 8th, 1897. 



12. Do. Section of ovicell, X 25. 



13. Do. Calcareous section showing the irregular wavy position of the 



zocecial tubes, also showing small internal projections, X 25. 



Plate 20. 



Fig. 1. Hornera lichenoides (J? onto]).), X 25. Longitudinal section showing the 

 polypides and the ovicell, surrounded by the wall (mi), from which the 

 reticulum (r) has separated, no doubt in consequence of the processes 

 of preservation and preparation. In the reticulum, on the left-hand 

 side, some ovarian masses are seen, and these are more magnified in 

 fig. 4. Six embryos are seen in the section. From lat. 77" 55' N., 

 long. 55° 25' E,, 115 fathoms ; July 8th, 1897. 



2. Do. Transverse section of ovicell, x 25. From lat. 77° 55' N., 



long. 53° 20' E., 130 fathoms ; July 13th, 1897. 



3. Do. Section of embryo, X 85. Whether the cilia on the upper part 



are in two tufts or are continuous is not clear. 



