Boone, Coelenterata, Cruises of "Ara" and "Alva" 49 



men 22 millimeters diameter, the warts of the central dome are 

 crowded, elongated, mammiform, much as those shown in Kish- 

 inouye's figures of "Perirhiza nematophora" (Journ. Coll. Sci. 

 Tokio, 1902, vol. XVII, pi. 2) . This, the largest of the "Alva" speci- 

 mens, has the marginal lappets and is quite typically developed. 



References : Mediisa cephea, Forskal, P., Descript. Anim. Itin. 

 Orient., 1775, p. 108, No. 22; Icon., tab. 30. 



Medusa octostyla, LiNNE, C. (Gmelin, J. F.), Syst. Nat, 1788, 

 ed. XIII, par. 6, p. 3157. 



Cephea rhizistomoidea, Peron, F., et Lesueur, C. A., Ann. Mus. 

 Hist. Nat. Paris, 1809, t. XIV, p. 361, No. 100. 



Polyrhiza cephea, Agassiz, L., Contrib. Nat. Hist. U. S. Smith- 

 sonian, 1862, vol. IV, p. 156. 



Diplophilus couthouyi, Agassiz, L., op. cit. p. 158. 



Cephea forskalea, Haeckel, E., Syst. der Medusen, Densk. Med.- 

 Natur. Gesellsch. Jena, 1879-1880, p. 574. 



Cephea conifera, Haeckel, E., op. cit. p. 576, taf . 36, figs. 3-8. 



( ?) Cephea fu^ca, Peron, F., et Lesueur, C. A., op. cit. 1809, p. 

 361, No. 99. 



( ?) Cassiopea fusca, Dusimuer, M., 1835, Musee du Jardin des 

 Plantes, No. 111. 



Perirhiza nematophora, Kishinouye, K., Journ. Coll. Sci. Tokio, 

 1902, vol. XVII, art. 7, p. 14, pi. 2, figs. 11-13. 



Cephea cephea, Mayer, A. G., Carnegie Inst. Washington, Publ. 

 109, 1910, Medusae of the World, vol. Ill, Scyphomedusae, 

 p. 654. 



Rhizostomata triptera Vanhoften 



Genus: MASTIGIAS L. Agassiz 

 Mastigias papua (Lesson) 



Plate 7 

 Type: M. Lesson first described and exquisitely illustrated 

 this species from material secured by the "Coquille" in Offack 

 Bay, Waigiou and Dorey Harbor, New Guinea, and deposited in 

 the Paris Museum collections. 



