SCYPHOMEDUSAE COLLECTED BY STEAMER ALBATROSS. 



189 



CARYBDEA ALATA, var. GRANDIS Agassiz and Mayer. 



Charybdea grandis Agassiz and Mayer, 1902, Mem. Museum Comp. Zool. 



at Harvard College, vol. 26, p. 153, pi. 6, figs. 26-31. 

 Carybdea alata, var. grandis Mayeb, 1910, Medusae of the World, vol. 3, 



p. 511, fig. 329. 



The bell of this medusa becomes 230 

 mm. high, but the largest specimen of 

 this cruise was obtained by the Alba- 

 tross in Borneo and is only 166 mm. 

 high. This tropical Pacific form may 

 be distinguished by its short, wide- 

 flaring pedalia and by having only 1 

 or 2 median eyes upon each sense-club 

 and no lateral eyes. When young, how- 

 ever, there are 2 large median and 2 

 small lateral eyes, but the latter appear 

 to fuse later with the median eyes. 

 There are 24 velar canals which are 

 short, branched, and non- anastomosing. 

 C. moseri Mayer is only a half -grown 

 stage of this medusa. In C. alata there 

 are 6 eyes in each sense- club, and the 

 pedalia are longer and narrower than 

 in the large variety grandis. 



The dimensions and characters of the 

 two largest of the three specimens 

 found by the Albatross are as follows: 



Fig. 3. — Carybdea alata, half- 

 grown MEDUSA FROM THE HA- 

 WAIIAN Islands. Two views of 



ITS SENSE - CLUBS AND A QUAD- 

 RANT OF THE VELARIUM, SHOWING 

 THE STRAIGHT SIMPLE VELAR 

 CANALS. 



Station 5361, Feb. 9, 1909, 



Manila Bay, Luzon, 12 D. 5594, Sept. 30. 1909, 



fathoms, 2 specimens. off Mount Putri, 



Cat. No. 28713 U.S.N.M. Borneo. 



Height of bell 



Width of bell 



Length of pedalia 



Width of pedalia at widest part 



Width of pedalia at base 



Height of sensory niche above velar margin 

 Number of eyes in each sense-club 



Gonads 



120 ! 166. 



88 ' 144. 



38 along inner side i 77 along outer side. 



I 36 along inner side. 



16.5 ! 29. 



14 



16 31. 



2 median, no lateral eyes 2 median, no lateral 



eyes. 

 Small, immature Small. 



