1897.] Zoology. 71 
Fig. 3. Cell from ventral wall near anus showing nuclear substance 
which has been forced from right to left in the sedan Fixation, 
Hermann’s fluid; stain, iron haematoxylin ; Obj. 3 mm.; Occ. 12. 
Fig. 4. Section of elongated cell at dorsal margin of typhlasdlė show- 
ing fibres which traverse the cell. No lateral cell walls visible. The 
chitinous lining of alimentary canal is shown in double contour. Fix- 
ation, Flemming’s fluid ; stain, iron haematoxylin ; Obj. 3 mm.; Occ. 
12 
Fig. 5. Cell from region of typhlosole, dorsal side, showing the very 
thick chitinous wall (unshaded) which is perforated by many minute 
canals. Nucleus slightly distorted. Feu Hermann’s fluid ; piain 
iron haematoxylin; Obj. 3 mm. ; Occ. 1 
Fig. 6. Cell from ventral side pokorio : typhlosole showing Satan 
ity of nuclear and cytoplasmic structures. The cyto-reticulum is very 
strongly marked on the side of the cell next the lumen. Fixation, 
Hermann’s fluid; stain, iron haematoxylin; Obj. 3 mm.; Oce. 12. 
Fig. 7. Cell from dorsal wall posterior to typhlosole showing an in- 
dentation on the coelomic side which is probably the beginning of cell 
division ; the circular muscles are shown in cross section. A densely 
granular process of nutritive substance projects into the nucleus on its 
luminal side. Fixation, corrosive sublimate; stain, Biondi-Heiden- 
hain; Obj. 3 mm.; Oce. 12. 
Fig. 8. Cell =e same region as preceeding figure, showing later 
stage of amitosis. Fixation, stain and magnification same as Fig. 7. 
Fig. 9. Cell from same region as Figs. 7 and 8. Nutritive substance 
projects by many processes into nucleus, some of which contain vacu- 
oles and are apparently being set free into nucleus to form nucleoli. 
Fixation, stain and magnification same as preceeding figure. 
E. G. Conxiiy, University of Pennsylvania, 
Myriapoda Climbing Vertical Glass Surfaces.—Dr. C. Ver- 
hoeff has been making experiments upon the climbing powers of Polyz- 
enus and of juloid diplopods. His results show that unless the surface 
is such or is covered with some substance that gives a purchase to their 
claws the diplopods have not the power of climbing in the true sense of 
the word. They are only able to reach up the sides of a glass dish by 
using the last few segments of their body as a base of support. On the 
other hand the Polyxenids can climb. This fact, it may be noted, is 
patent to every one who has collected and kept them alive in a 
vial. They are invariably found in the neighborhood of the cork, ready 
to escape as each new one is putin. And it may be added that the pauro- 
pods can climb, though ‘scarcely as well as Polyxenus. But what they 
