330 BULLETIN 100, UNITED STATES NATIONAL MUSEUM. 



Family AEGINIDAE Gegenbaur, 1856. 

 Genus AEGINA Eschscholtz, 1829. 



Sens em. Maas (1904a, 1905).— Bigelow (1909a, 1913). 



AEGINA CITREA Eschscholtz. 



Aegina citrea Eschscholtz, 1829, p. 113, pi. 11, fig. 4. Synonymy, Mayer, 

 1910, p. 451. 



Aegina citrea — material examined. 



The specimen is in fair condition, except for the margin, which is 

 so damaged that I have not been able to count the otocysts, nor to 

 make any observations on the peripheral canal system. 



The gastric pouches are of the typical citrea type, each of the eight 

 pouches is subdivided at its margin by a shallow indentation, just 

 as in the larger specimens in the eastern Pacific and northwestern 

 Pacific series (Bigelow 1909a, 1913) and as figured by Maas (1905) 

 for the Siboga examples. 



Color. — In the preserved specimens stomach and gonads are pale 

 yellowish; tentacles colorless. 



AEGINA ROSEA Eschscholtz. 



Aegina rosea Eschscholtz, 1829, p. 115, pi. 11, fig. 4. — Haeckel, 1879, 

 p. 338— Vanhoffen, 1908, p. 48, pi. 7, figs. 1, 2 ; pi. 9, figs. 16-19.— Maas, 

 1909, p. 35. For further synonymy see Mayer, 1910, p. 452, "A. rhodina." 



The single example is in rather poor condition; the margin very 

 much damaged, and the large gonads torn. No study of the otocysts 

 or peripheral canals was possible. Its identity with rosea is shown 

 by the fact that, in spite of its large size, the eight gastric pouches 

 are not subdivided, and by the reddish color of stomach and gonads. 

 It is too poorly preserved to add anything to the previous accounts. 



Genus SOLMUNDELLA Haeckel 1879. 



Sens. em. Maas, (1904, 1905), Browne (1905). 

 This genus has recently been discussed by Maas (1909), Browne 

 (1905), Mayer (1910), Vanhoffen (1908), and by the writer (1909a). 



