Boone, Coelenterata, Cruises of "Eagle" and "Ara," 1921-28 41 



Color : In life this jellyfish has the exoderm of the umbrella milky- 

 white, the endodermal part of the umbrella a rich red ; the pedalia are 

 reddish brown ; the tentacles are an opaque milky blue. 

 References: Periphylla hyacinthina Steenstrup, Acta et Catal. 

 Musei Hafniensis, 1837, (not available for examination). — 

 Haeckel, System der Medus., p. 419, taf . 24, 1880.— Vanhoffen, 

 Deutsche Tiefsee Exped. Valdivia, 1898-99, Bd. 3, p. 29, pi. II, 

 fig. 9, 1903, (excellent color plate).— Bigelow, H. B., Mem. Mus. 

 Comp. Zool., vol. 37, p. 26, pi. 1, fig. 3, pi. 9, fig. 2, (color plate) 

 1909. (With full synonymy, including that of the variety 

 dodecabostrycha.) — Mayer, Medusae of World, vol. Ill, p. 544, 

 figs. 342, 343, 1910, (synonymy) . 



Family: ATOLLIDAE. 



Genus : ATOLLA Haeckel, s. s. Fewkes. 

 Atolla wyvillei Haeckel. 

 For color plate see Bigelow, 1909. 



Type: Haeckel's type was obtained in the Antarctic Ocean; deposi- 

 tory not stated. 



Distribution: A deep-sea species known first from stations in the 

 Antarctic and sub- Antarctic, later taken by the "Albatross" at sev- 

 eral stations in the eastern Pacific, including Hawaii and the coast of 

 California. 



Material examined: One small specimen, dredge down 300 fms., 

 bottom depth 1400 fms., Pacific Ocean, 50 miles S. W. of Cape Mala, 

 Panama ; piece of a large specimen, from the same locality. 



Color : See Dr. Bigelow 's exquisite color plates of this species made 

 from living specimens. (Mem. Mus. Comp. Zool., vol. 37, pi. 8, pi. 9, 

 fig. 3, 1909.) The center of the bell is deep wine-red with more deli- 

 cate markings of the same color toward the margin ; the lappets and 

 tentacles are delicate amber. 



Life history : Unknown. 



Technical description: Consult Haeckel (1880) for the original 

 description, and Bigelow (1909) for critical discussion of additional 

 knowledge of this species. 



The "Ara" specimen has an axial diameter of 46 mm., with broad 

 radial furrows and smooth lappets. 



References: Atolla wyvillei Haeckel, Syst. der Medusen, p. 488, 

 1880; Rept. Voy. H. M. S. "Challenger," Zool., vol. IV, p. 113, 



