Bieetow.— Explorations in the Gulf of Maine. 
PLATE 6. 
Occurrences of Medusae, Ctenophores and Siphonophores. 
S. Staurophora mertensu. 
A. Aglantha digitale. | i 
P. Pleurobrachia pileus. 
B. Bolinopsis infundibulum. 
H. Physophora hydrostatica. 
The curves mark the off-shore limit of abundant Aurelia and Cyanea. 
