DIPHYES FOWLERI. 255 



one; the dorsal facet is symmetrical, broadly oval, and bomided by the two 

 prominent lateral ridges. The dorsal ridge is discernible only near the base of 

 the nectophore. 



In the original account Lens and Van Riemsdijk state (:08) that there are 

 four ridges at the apex. But in all of the specimens studied I find that the 

 right- ventral ridge arises a short distance below the apex (Plate 8, fig. 3). 

 Neither dorsobasal nor laterobasal teeth are present. The hydroecium is shal- 

 low, its cavity hardly extending beyond the base of the nectosac (Plate 7, fig. 8). 

 The dorsal wall of the hydroecium, below the bell opening, is not divided into 

 separate wings, but is merely slightly concave.. In no case was the bud for the 

 inferior nectophore sufficiently advanced to throw any light on its future form, 

 nor was the "Siboga" series any more instructive in this respect. 



The apparent absence of a special nectophore in the groups of appendages 

 has been noted by Lens and Van Riemsdijk, who have seen a gonophore in 

 some specimens. In our most advanced cormidia only one bud, besides bract, 

 tentacle, and siphon, was ever visible. This was probably the future gonophore 

 (Plate 11, fig. 2, Go.). It must be confessed, however, that to establish the 

 absence of a special nectophore, will require a study of material with the groups 

 of appendages further developed. 



This species is entirely colorless in life. 



D. contorta is so far known only from the Malaj'sian region and from the 

 Eastern Tropical Pacific. 



Diphyes fowleri Bigelow. 

 Plate 8, fig. 4; Plate 9, fig. .5. 

 Diphyes fowleri Bigelow, : lib, p. 346, PI. 28, fig. 5. 



Station 4587 300 fathoms to surface 2 anterior nectophores. 



" 4634 " " " " 1 



" 4638 '■ " " " 1 



" 4646 " " " '• 2 



" 4657 " " " " 1 



u 4(359 u u u u ^ 



The largest specimen is 12 mm. long. The identity of the series listed above 

 with D. fowleri rests on an actual comparison between the Pacific and the Bis- 

 cayan specimens. As I have elsewhere noted (:11b, p. 346) the anterior bell of 

 D. fowleri very closely resembles D. subtiloides Lens and Van Riemsdijk in gen- 

 eral form. As in subtiloides there are five ridges running from the pointed apex 



