48 Bulletin, Vanderbilt Marine Museum, Vol. IV 



The "Ara" specimen is an unusually fine one, measuring 190 mm. 

 diameter. 



References: Medusa tuberculata Macri, G., Osservazioni Int. Pol- 

 mone Marino, p. 20, 1778. 



Cotylorhiza tuberculata Agassiz, L., Contrib. Nat. Hist. U. S., vol. IV, 

 p. 158, 1864.— Mayer, A. G., Medusae of the World, Publ. 109, 

 Carnegie Inst, of Washington, vol. Ill, p. 659, pi. 73, fig. 2, color 

 plate, and text figs., 1910, (with critical diagnosis and full 

 synonymy). 



Rhizostommata Scapulata 



Genus : STOMOLOPHUS L. Agassiz. 

 Stomolophus meleagris L. Agassiz. 



Plate 10. 



Type: Louis Agassiz states that he first observed myriads of this 

 species in April, stranded upon the sand on the beach of Warsaw 

 Island, below Savannah, Georgia; all of these were partially decom- 

 posed. Years later a specimen in similar condition was given him 

 from the harbor, Charleston, S. C. Depository not stated. 



Distribution: Pelagic in pure ocean water off the coast of the 

 southeastern United States, from the lower Chesapeake Bay southward 

 to the Tortugas, Florida; it is abundant in the Gulf of Mexico, and 

 also occurs along the northern coast of South America. Recorded as 

 8. chunii Vanhoffen from the Bay of Panama. 



Material examined: Eleven, collected off Miami Beach, Florida, 

 by the "Ara." 



Color: The bell is milky bluish or yellowish and the entodermal 

 parts are yellow; the outer surface of the exumbrella is reticulated 

 with brown which becomes a rather dense band near the margin, 

 marked with many white or yellowish spots. The mouth frills are 

 brownish pink. 



Technical description : Bell diameter 175 to 200 mm. axial diam- 

 eter; hemiovoid, gelatinous substance thick and rigid, semi-opaque, 

 marginal tentacles absent ; eight rhopalia, four being radial and four 

 interradial in position. Each rhopalium is deep-set in a niche between 

 the ocular lappets and is also shielded above by a partial web between 

 the lappets. The sense club is spindle-shaped, hollow, terminating in a 

 knob-like end. Just above the base of each sense club there is a deep 



