396 JOHNS HOPKINS UNIVERSITY MORPHOLOGICAL MONOGRAPHS. 



Figure 2, a transverse section of the same structures. X 215 diameters. 



Figure 3, a diagrammatic surface view of the same structures in a very early 

 stage of development. 



Figure 4, a diagrammatic surface view of these structures in a later stage of 

 development. 



Figure 5, a dorsal view of the ganglion and eye of Salpa hexagona, chain form, 

 showing the lateral outgrowths from the ganglion. X 118 diameters. 



Figure 6, a dorsal view of the ganglion and eyes of Salpa democratica-mucronata, 

 chain form, x 362 diameters. 



Figure 7, a dorsal view of the eye, ganglion, nerves and ciliated funnel of Salpa 

 democratica-mucronata, solitary form, x 70 diameters. 



Figure 8, a lateral view of the ganglion and dorsal eye of Cyclosalpa Chamissonis, 

 chain form, x 118 diameters. 



Figure 9, a dorsal view of the eye, ganglion and nerves of Cyclosalpa pinnata, 

 chain form, x 118 diameters. 



Figure 10, a lateral view of the same. X 118 diameters. 



