OLINDIAS SINGULARIS. 



109 



on a considerable series from different localities, the following table is 

 appended. The chief difference is that I have found a proportionately 

 greater number of primary (exumbral) tentacles than either Haeckel ('79), 

 Maas (: 05), or Mayer (: 00 b , : 04) have recorded, and proportionately fewer 

 secondary tentacles and tentacular bulbs. 



Olindias singularis Browne. 



Olindiaa singularis Browne, : 04, p. 737, pi. 56, fig. 2, pi. 57, fig. 1. 



Plate 4, Fig. 1; Plate 31, Figs. 1-10; Plate 32, Fig. 8. 



Mangareva Harbor ; surface ; 23 specimens, 16 to 36 mm. in diameter. 



The general form of this graceful species, as seen in side view, and the 

 extent of the gonads, are shown in the photograph reproduced on PI. 4, 

 fig. 1. In all structural features, except for the arrangement of the otocysts, 

 it so closely resembles O. phosphor/ca that no extended account is necessary 

 here. Browne was unable to find any sucking pads on the primary ten- 

 tacles in the Maldive specimen, and has therefore raised the question 

 whether Olindias does actually possess such organs ; but inasmuch as the 

 claw-like terminations of the primary tentacles which he describes undoubt- 

 edly correspond to the structures interpreted as suckers by other authors, 

 and which occur in the present specimens (PI. 31, fig. 8), the distinction 

 is apparently one of definition rather than of observation. To determine 

 conclusively whether these terminal organs do exercise an adhesive func- 



