26. 
ad. 
317 
The distal end of a hydrotheca from the abcauline surface. X 66. 
The distal end of a hydrotheca from the adcauline surface. X 66. 
The distal end of a. hydrotheca showing the "A”-tent, formed 
The "A”-tent seen from above. X 66. 
Abietinella operculata (Jåd.). X 34. 
The diaphragm of the same species. ; 
The opening of the diaphragm in Abietinaria Traski. X 66. 
A hydrotheca of Abietinaria coei Nutt. showing the stalk-mark 
and the adcauline internal tooth. X 34. 
A hydrotheca of Abiet. abietina L. showing the stalk-mark. 
20. 
x 
Two hydrothecae of Abiet. variabilis after their abcauline pro- 
jecting portion has been cut away. Distally is seen the boundary 
line of the adcauline hydrothecal wall, and proximally the dia- 
phragm, the aperture of which is surrounded by a projecting 
margin, and the stalk-mark. X 20. 
A hydrotheca of Diphasia pinaster L, with stalk-mark. X 20. 
A hydrotheca of the same species after its abcauline projecting 
portion has been cut re Proximally åre seen the stalk- 
mårk and the diaphrag 
28—29. Sertularella rs Nok The distal end of a hydrotheca 
66. 
lune 
Bo 
me 
[v 
æ 
seen from the opposite sides. X 
Plate 
Hydralilmania plumulifera Allm. A portion of a proximal 
branch. Dorsal vi The h der, which show distinet 
sal kr have been regenerated. X 34. 
The same species. A portion of a distal branch. Frontal view. 
x 34. 
The same species. A portion of a distal branch. Lateral view. 
Distinct stalk-marks. X 34. 
The distal end of a hydrothesse, seen from the abcauline sur- 
face. X 66. 
The distal end of a hydrotheca, seen from the side. X 66. 
ip bigger end of a hydrotheca, seen from the adcauline surface. 
Hydralmania [ens (L,). df portion of a branch. Lateral 
Odontotheca SSARE ad E "sortlon of a branch. Frontal 
i i 34. 
x 
The same species. The Distal end of a hydrotheca, seen from 
the abcauline surface. X 66. 
The distal end of a hydrotheca, seen from the adcauline surface 
and partly from above. The translucent abcauline sinus is 
seen, X 66. 
