596 REPORT OF COMMISSIONER OF FISH AND FISHERIES. [94] 



identification. A few species obtained in 1884 are also included in the 



list.* 



Atolla Verrillii Fewkes, sp. nov. 



The genus Atolla was described by Hseckel in his report on the deep- 

 sea medusae of the " Challenger," from the Antarctic Ocean, between the 

 Kerguelen Islands and Melbourne, and from St. Mathias Bay, Pata- 

 gonia. 



Our species was collected in the following localities : 



The genus is represented by eight specimens, three of which are over 

 45™™ in diameter. The "Challenger" collected five specimens. Our 

 species is very closely related to the Antarctic one, A. Wyvillii Hseck. 

 The depth recorded for A. Wyvillii is 1,950 and 2,040 fathoms. Our 

 species ranges from 373 to 2,369 fathoms. My largest specimen, a little 

 over 45™™ in diameter, although smaller than Hseckel's largest (66™™) 

 has twenty eight tentacles, marginal sense-bodies, and marginal lobes 

 before bifurcation, while his has but twenty-two. 



Nauphantopsis Diomedece, gen. et sp. nov. 



A new genus, Ifauphantopsis, one of the most important collected by 

 the "Albatross," resembles Nauphanta in the sculpturing of the exum- 

 brella, but while the latter has sixteen marginal lappets, Wauphantopsis 

 has thirty-two; Nauphantopsis has thirty-two deep furrows across the 

 corona; Nauphanta has sixteen deep and sixteen shallow coronal incis- 

 ions; Nauphantopsis has twenty-four tentacles and eight sense-bodies, 

 which are very imperfect. Nauphanta has eight tentacles and eight 

 sense-bodies. Three tentacles are therefore side by side on the rim of 

 the former, alternating with the sense-bodies. The single specimen was 

 found at station 2038, in latitude 38° 30' 30" K. and longitude 69° 08' 

 25" W., in a depth of 2,033 fathoms. 



This genus is morphologically one of the most valuable of the collec- 

 tion, and, like Nauphanta^ probably belongs to the deep-sea fauna. It 

 connects the family of Collaspidae, of which Atolla is one of two mem- 



* In most cases it is impossible to say whether the novel forms of medusse taken in 

 the trawl and trawl-wings are inhabitants of the bottom waters or the surface, or of 

 intermediate depths. Eventually those that belong to the surface-fauna will doubt- 

 less be taken in the surface-nets, but this will require much more extensive collecting 



of the surface animals than has yet been attempted. 



A. E. V. 



