262 CHUNIPHYES MULTIDENTATA. 



specific characters. So far as I can judge from the account of the rather frag- 

 mentary "Siboga" specimens they too were identical with the present series. 

 All known representatives of the genus, then, must be referred to its type 

 species. 



Chuniphyes multidentata Lens and Van Riemsdijk. 

 Plate 8, fig. 9, plate 10, fig, 7, plate 12, fig, 6. 



Chuniphyes multidentata Lens and Van Riemsdijk, :08, p. 13, pi. 1, fig, 9-11, pi. 2, fig, 12-15; 

 BiGELOw, : lib, p. 348. 



Station 4703 300 fathoms to surface 1 specimen with both nectophores 



still connected. 

 " 4724 " " " " 2 anterior and one posterior necto- 



phores. 



In none was anything but the proximal end of the stem preserved. In 

 the entire specimen the superior nectophore is 22, the inferior 26 mm. long. 



The loose superior nectophores measure 20 and 17 mm., the inferior one 

 24. The complete specimen is in good enough condition to allow a much more 

 detailed study than Lens and Van Riemsdijk were able to make from the frag- 

 mentary and much distorted "Siboga" material. And in this case, as so often, 

 it turns out that what at first seemed complex and remarkable on fragmentary 

 specimens, is easily explained from better material. 



Anterior nectophore. There are four ridges at the apex, one ventral, one 

 dorsal, and two laterals. As the describers of the species observed, the ventral 

 ridge runs undivided to the opening of the hj^droecium, whereas both the dorsal 

 and the lateral ridges branch dichotomously. The result is that there are seven 

 ridges at the base of the nectophore, one ventral, two dorsal, and on each side 

 a dorsolateral and a ventrolateral. These ridges enclose a narrow triangular 

 dorsal facet, and on each side a triangular dorsolateral facet extending from 

 base to apex, a shorter, triangular medianlateral one, and a ventrolateral of 

 irregular outline. There is of course no ventral facet, since the ventral ridge 

 does not branch. The facets have been described in great detail, by Lens and 

 Van Riemsdijk for the "Siboga" specimens. The dorsolateral ridges end in 

 prominent teeth, the two dorsals and the two ventrolaterals in minor ones. 

 There is no ventral tooth. There is a prominent tooth breaking the basal mar- 

 gin of each medianlateral facet as noted by Lens and Van Riemsdijk, and 

 likened by them to the letter Z. 



Hydroecium. The hydroecium is in the form of a deep furrow reaching to 

 the level of the upper end of the nectosac, open ventrally for its entire length. 



