122 



THE MEDUSAE. 



able series of the genus, this range must now be extended to the Tropical 

 Pacific. 



Unfortunately the otocysts, the one character of greatest importance, are 

 destroyed in all the present specimens, and therefore they might equally 

 well be referred either to A. diyitale or to A. rosea so far as this character 

 is concerned. Their size, however, suggests that their closest affinity is with 

 A. digitale ; but inasmuch as they are distinctly smaller than adults of the 

 latter, they probably belong to a new variety of that species. 



Aglantha digitale var. intermedia, var. nov. 

 Plate 29, figs. i-10. 



Station 4583 

 Station 4605 

 Station 4609 

 Station 4613 

 Station 4638 

 Station 4652 

 Station 4652 

 Station 4659 

 Station 4669 

 Station 4671 

 Station 4673 

 Station 4676 



300 fathoms to surface 

 200 fathoms to surface 

 300 fathoms to surface 

 200 fathoms to surface 

 300 fathoms to surface 

 200 fathoms to surface 

 400 fathoms to surface 

 300 fathoms to surface 

 300 fathoms to surface 

 300 fathoms to surface 

 300 fathoms to surface 



2 specimens. 



1 specimen. 



4 small specimens. 



3 specimens. 



5 specimens. 

 5 specimens. 



2 specimens. 



1 very small specimen. 



3 specimens. 



8 specimens, Type. 

 1 specimen. 

 1 specimen. 



300 fathoms to surface; 



In general form, and in the presence of a gelatinous apical proportion 

 the specimens agree very closely with the various accounts of A. digitale. 

 The outline varies, largely depending upon the state of contraction of 

 the muscular subumbrella, the bell being either broad, or narrow and 

 constricted. The largest specimen is about 14 mm. in diameter by about 

 15 mm. high, the smallest (PI. 29, fig. 9) only 2.5 mm. high. In the large 

 specimens there are from eighty to ninety tentacles. In the smallest there 

 are only about thirty-five. This number is rather larger than Agassiz ('65) 

 and Vanhoffen ('97) have observed in A. digitale at corresponding stages, and 

 it may prove to be a character of specific significance. In all the speci- 

 mens the tentacles are broken short off. 



In the smallest specimens, as A. Agassiz ('65) has observed, the short manu- 

 brium hangs directly from the subumbrella surface (PI. 29, fig. 9). With 



