280 BULLETIN 100, UNITED STATES NATIONAL MUSEUM. 



DESCRIPTIONS OF GENERA AND SPECIES. 



Class HYDROMEDUSAE. 



Order ANTHOMEDUSAE. 



Family BOUGAINVILLEIDAE Gegenbaur, 1856. 

 Genus BOUGAINVILLEA, Lesson, 1843. 



BOUGAINVILLEA FULVA Agassiz and Mayer. 



Bougainvillea fulva Agassiz and Mayer, 1899, p. 162, pi. 2, fig. 6. Syno- 

 nymy, Mayer, 1910, pp. 160, 492. 



Bougainvillea, fulva — material examined. 



Locality. 



Diamete 

 in nun. 



This species has been studied so fully by previous students that a 

 detailed account is unnecessary here. The most advanced stage yet 

 observed is described by Maas (1905, 1906) ; slightly younger speci- 

 mens by me (1909a). The account by Hartlaub (1909), and his 

 comparison between fulva and the various Atlantic Bougainvilleas, 

 is especially noteworthy. I need merely note that the present series 

 contains two color phases, otherwise indistinguishable, one with ma- 

 nubrium yellowish, the other with a brown stripe in each interradius. 

 The difference is not a sexual one, because both males and females 

 were found in each phase. Perhaps it is evidence of differences in 

 nutrition. 



The range of B. fulva extends over the whole breadth of the tropi- 

 cal Indo-Pacific from the coast of Mexico in the east (Bigelow, 1909a) 

 to the Gulf of Aden on the west (Djibuti, Hartlaub 1909). 



Family PANDEIDAE, Haeckel, 1879 (sens. em.). TIARIDAE, 



Hartlaub, 1913. 



Genus PROTIARA, Haeckel, 1879. 



As I have previously pointed out (1913, p. 12) " Tiaridae" can not 

 be used as the name of a medusan family, Tiara being preoccupied 

 for a mollusk. Protiara was denned by Haeckel as having gonads in 

 the form of single longitudinal swellings, and it is so limited by 



