342 BULLETIN 100, UNITED STATES NATIONAL MUSEUM. 



DIPHYOPSIS MITRA (Huxley) Bigelow. 



Diphyes mitra Huxley, 1859, p. 36, pi. 1, fig. 4. 



Diphyopsis diphyoides Lens and Van Riemsdijk, 1908, p. 51. pi. 8, figs. 65, 



66. For synonymy and description, Bigelow, 19116, p. 258, pi. 7, fig. 9; 



pi. 9, fig. 4 ; pi. 10, figs. 4, 15 ; pi. 11, fig. 6 ; pi. 12, fig. 5. 



Diphyopsis mitra — material examined. 



The specimens range in length from 3 to 9 mm. They agree so 

 well with the account by Lens and Van Riemsdijk (1908) and with 

 the Albatross eastern Pacific series (Bigelow, 19116) that no de- 

 scription of them is necessary here, further than to note that they 

 show no noticeable variation in the distinctive specific characters, 

 that is, 5 ridges at the apex, short hydroecium almost wholly below 

 the bell opening ; short pear-shaped somatosyst ; total absence of baso- 

 lateral teeth, and baso-clorsal tooth hardly distinguishable. None 

 of the specimens have inferior nectophores attached, nor were any 

 found loose. 



D. mitra is widely distributed over the eastern tropical Pacific, as 

 well as in the Malaysian region. I have myself studied typical speci- 

 mens of it from the West Indies and western Atlantic (Bigelow, 

 1918). 



DIPHYOPSIS CHAMISSONIS (Huxley) Bigelow. 



Diphyes chamissonis Httxley, 1859, p. 36, pi. 1, fig. 3. 



Diphyopsis weberi Lens and Van Riemsdijk, 1908, p. 53, pi. S, figs. 67, 68. 



Diphyopsis chamissonis [Synonymy], Bigelow, 1911ft, p. 347. 



Diphyopsis chamissonis — material examined. 



