40 Bulletin, Vanderbilt Marine Museum, Vol. IV 



cysts. The rhopalia have two large median and four small lateral eyes, 

 all placed on the inner side of the bulb. The large eyes have well 

 developed, convex lenses. The velarium is thick, well developed, each 

 quadrant having ten dendritic velar canals which terminate in many 

 fine, non-anastomosing branches. The nerve extending from the base 

 of each pedalium to the rhopalium is a well delineated white thread. 

 The stomach is cruciform with four slightly recurved lips and extends 

 approximately a third of the distance from the apex to the velarium. 

 There are numerous short, gastric cirri. The genital organs are eight 

 in number, attached to the four interradial septa, and extending like 

 ribbon-like ruffles with frilled edges into the perradial gastrovascular 

 pouches of the bell. 



References: Tamoya haplonema Muller, Abhand. Naturf. Ges. 

 Halle, Bd. 5, p. 1, taf. 1, 2, 1859. — Agassiz, L., Contrib. Nat. Hist. 

 U. S., vol. IV, p. 174, 1862— Haeckel, Syst. der Medusen, p. 443, 

 1880. — Brooks, Studies Johns Hopkins Univ. Labr., vol. II, p. 

 138, 1882. — von Lendenfeld, Proc. Linn. Soc. New South Wales, 

 vol. 9, p. 245, 1884.— Mayer, Mem. Nat. Sci. Museum Brooklyn 

 Inst. Arts and Sci., vol. I, p. 28, pi. 7, figs. 60-64, 1904 ; Medusae 

 of the World, Publ. 109, Carnegie Inst. Washington, vol. Ill, 

 p. 513, pi. 57, figs. 2 to 2" ', color plate, 1910.— Boone, L., Bull. 

 Bingham Oceanog. Coll. vol. I, no. 5, p. 1, 1928. 

 Tamoya prismatica Haeckel, ibid, p. 443. 



Carybdea (Tamoya) haplonema Fewkes, Rept. U. S. Comm. Fish, 

 for 1886, p. 526, issued 1889. 



Order: CORONATAE. 



Family: PERIPHYLLIDAE. 



Genus: PERIPHYLLA Steenstrup. 

 Periphylla hyacinthina (Steenstrup). 



Type: Steenstrup 's type was taken in 300 fms., at Cape Farewell, 

 Greenland, and is deposited in the Copenhagen Museum. 



Distribution : This exquisite medusa is widely distributed over the 

 floor of the great oceans, and especially in the tropical parts of the 

 Pacific, the west coast of Mexico, coast of Chile, the Hawaiian Islands, 

 Philippines, Indian Ocean, Malaysia; Mediterranean Sea, and Guinea 

 Stream in the Atlantic Ocean off West Africa. 



Material examined: One specimen, dredged in 300 fms., bottom 

 depth 1400 fms., 50 miles S. W. of Cape Mala, Panama, by the "Ara," 

 March 16, 1926. 



