28 Bulletin, Tanderbilt Marine Museum, Vol. IV 



Distribution: A deep-sea species known from the tropical Amer- 

 ican Pacific. 



Material examined : One specimen, dredged in 300 fms., 50 miles 

 S. W. of Cape Mala, Panama, March 16, 1926, by the "Ara." 



Color: This species, which is very closely related to the West 

 Indian Stomotica pterophylla Haeckel, and possibly identical with it, 

 is milky white, with the gonads rose-pink, the manubrium and ten- 

 tacles canary yellow. 



Life history : Unknown. The members of this genus are known to 

 develop through Tubularian hydroids. 



Technical description: Consult Maas (1897), p. 11, pi. I, figs. 1-7, 

 color plate and Bigelow (1909), p. 203. 



The single specimen taken by the "Ara" has an axial diameter of 

 12 mm. It is somewhat broken, but corresponds in all essentials with 

 the above cited descriptions of this species. 



References : Stomotica divisa Maas, Mem. Mus. Comp. Zool., vol. 23, 

 p. 11, pi. 1, figs. 1-9, 1897.— Bigelow, H. B., Mem. Mus. Comp. 

 Zool., vol. 37, p. 203, pi. 7, fig. 9, pi. 43, figs, 6, 7, 1909.— Mayer, 

 Medusae of "World, Publ. 109, Carnegie Inst, of Washington, vol. 

 I, p. 114, fig. 61, 1910. 



Order: LEPTOMEDUSAE. 



Family: AEQUORIDAE. 



Genus : ZYGODACTYLA Brandt, s. s. Agassiz. 

 Zygodactyla groenlandica (Peron and Lesueur). 



Plate 1. 



Type: Peron and Lesueur recorded the species from "the seas of 

 Greenland." Louis Agassiz in his "tabular classification of the 

 hydroida" gives in addition to Greenland, the coasts of Maine, Bay 

 of Fundy and Massachusetts Bay. Neither author cites a depository 

 of his material. 



Distribution : The northern form of this species is larger than the 

 southern and ranges from the coast of Greenland to Cape Cod, Mass., 

 while the southern form is found in abundant swarms pelagic from 

 the southern shores of Long Island to Beaufort, N. C. 



Material examined : One large specimen about 21 inches in diame- 

 ter, collected at Eastport, Maine, by the "Eagle." 



