[21] MEDUSM FROM THE GULF STREAM. 533 
tween those which pass through the middle line of each marginal lap- 
pet. The best preserved of all the specimens is from Station 2717. 
In this specimen the stumps of certain of the tentacles are present. 
They lie, as stated above, on the notches between the marginal lappets. 
The form of the abaxial rim of the marginal lappets in this specimen 
is bifid, recalling the appearance in the marginal lappets of Atolla. 
The exumbral surface of the marginal lappet is rough, with slight pro- 
jections. Its rim is thin, the attachment and body of the lappet thick 
and gelatinous. The whole marginal lappet recalls those of the species 
verrillii of the genus Atolla. No sense bodies were seen in the alcoholic 
material at my control. 
Tt is desirable that the live medusa of Ephyroides be studied, as the 
features presented by the alcoholic material are of great morphological 
interest. It has not seemed to me best to say anything about these 
questions until more is known of the anatomy of the extraordinary 
genus. 
Family CYANEIDZ, L. Agassiz. 
CYANEA, sp. 
A specimen of Cyanea from the Guif Stream differs in certain respects 
from the Cyanea arctica, Per. et L., of the New England coast. It also 
differs from other species of this genus which have been described. 
With the imperfect knowledge derived from a single specimen, I hesi- 
tate to introduce a new name into the nomenclature of this genus, 
although there is littie doubt that the specimen referred to is not the 
common C. arctica.* 




J | 
Capeibene | Station. | North latitude. | West longitude. 
Aer & Z 
° ‘ “a 2) / ut 
11668 , 2542 40 00 15 7 42 20 
11669 2542 40 00 15 70 42 20 


A much larger specimen than either of those mentioned above was | 
collected in 1879, Station 378, No. 5124, off Cape Cod. This specimen 
resembles more closely than the others the common C. arctica, Per. et 
Les., but the mouth appendage and tentacles are missing. The forms 
of the marginal lappets are like those of C. arctica. 

* One of the main differences between this Cyanea and C. arctica is found in the 
incisions in the marginal lappets. There are in the unknown Cyanea eight deep 
ocular incisions, eight shallower tentacular incisions, and the margin of the bell be- 
tween each occular and tentacular incision is again incised. There are therefore 32 
marginal lappets. 
