BIGELOW: MEDUSAE AND SIPHONOPHORAE. 399 



adult, each of these primary saccules is supplemented by a number, 

 usually five, of finger-like diverticula. And, this, taken with the 

 other characters first enumerated, seems sufficient to warrant the 

 provisional identification. But the possibility that the present speci- 

 mens might have developed some other type of gonad, with further 

 growth, must be recognized. 



Aeginidae Gegenbaur. 



{Sensu Maas 1904b; Bigelow, 1909a). 



SoLMUNDELLA Haeckel, 1879. 



(For discussion of this genus see Maas (1905); Browne (1905, 1916); 

 Mayer (1910); Vanhoffen (1908a); and Bigelow (1909a). 



SoLMUNDELLA BiTENTACULATA (Quoy and Gaimard). 



Charybdea bitentaculata Quoy & Gaimard, 1834, p. 295, pi. 25, fig. 4, 5. 

 (For synonymy, see Bigelow, 1909a, p. 77; Mayer, 1910, p. 455). 



Station 10,200, 75-0 meters, 1 specimen about 2 mm. in diameter. 



This young specimen is too much contracted to show either the 

 peronii, gonads, or otocysts, consequently it might belong either to 

 the large {S. hitententaculata) or small (S. mediterranea) variety of the 

 species. 



SCYPHOMEDUSAE. 



Charybdeidae Gegenbaur. 



Charybdea marsupialis var. xaymachana Conant. 



Charybdea xaymacana Conant, 1897, p. 8, fig. 8. 

 (For synonymy, see Mayer, 1910, p. 509). 



Station 10,188, surface, 1 specimen, 40 mm. high, with large 

 gonads. 



Charybdea xaymacana has usually been considered as distinct from 

 C. marsupialis, though obviously a close relative of that well-known 

 Medusa (Mayer, 1910, p. 507). But comparison of the present 

 specimen, and one from Jamaica, with examples from Naples, shows 



