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 synonjony, 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. bitententaculata) or small {S. mediterranea) variety of the 

 species. 



SC\PHOMEDUSAE. 



Charybdeidae Gegenbaur. 



Charybdea marsupialis var. xaymachana Conant. 



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

 (For s5monymy, 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 



