Notes on Meduse of the Western Atlantic. 155 
Comparison of morphological characters of Cassiopea xamachana and Polyclonia 
frondosa. 
Cassiopea xamachana. Polyclonia frondosa. 
Color: Color: 
Yellowish-brown. Olive-brown. 
Pattern: Pattern: 
Concentric bands, light and dark. Dark center without spots. No bands. 
White spots near center. Margin Margin with numerous distinct 
white without spots. spots. 
Shape of disk: Shape of disk: 
Concave above, with raised circular Flat. No band. 
band. 
Appendages of oral arms: 
Yellow digitate appendages. Not 
sensitive. 
Oral arms: 
Projecting beyond margin of disk. 
Sense-organs: 
Not less than 13 in adult. 
ZOOLOGICAL LABORATORY, 
University of Vermont. 
Appendages of oral arms: 
hite scales guarding oral funnels. 
Irritable and contractile, 
Oral arms: 
Shorter than diameter of disk. 
Sense organs: 
12 in recently matured individual. 
