946 REPORT OF COMMISSIONER OF FISH AND FISHERIES. [20] 



sixteen tentacles, considering the number of marginal lappets as tbritj-- 

 two. The indications, therefore, are that there are either eigbt sense-bod- 

 ies and twenty-four tentacles, or thirty-two tentacles and no sense-bodies. 

 I do not entertain a belief in the latter condition, but from my observa- 

 tion of three tentacles, following each other, consider the former as a 

 correct interijretatiou. To that conclusion also the various aftinities of 

 medusa with Nau])hanta also jjoint. If sense-bodies are so difficult to 

 find in a specimen the margin of which is so well preserved, we may 

 well conclude that they are rudimentary or possibly functionless. 



The genus Kauphanta, to which l^auphanioxms is most closely allied, 

 differs primarily from it in the arrangement of the tentacles on the bell 

 margin. Whatever the number of tentacles may be found to be by later 

 research, the following fact is the result of direct observation : Three 

 tentacles are found in three consecutive indentations between the mar- 

 ginal lappets in Kauphantopsis, while in Nauphanta a tentacle alter- 

 nates with the marginal sense-body. Xanphanta has sixteen longitud- 

 inal furrows extending across the corona, while ymiphantopsis has 

 thirty-two. There are thirty-two marginal la))pets in Naiqihantopsis ; 

 sixteen in NaHphanta. Hiieckel describes, in addition to the sixteen deep 

 furrows, which traverse the whole corona of Xauphanta, sixteen others, 

 shallow, fourul intermediate between the deeper in the peripheral part 

 of the corona and on the central disk. These smaller furrows, thirty- 

 two in number, likewise exist in Naiiphautopsiti, but appear to be less con • 

 spicuous than in Xauphanta. The shape, size, and border of the mar- 

 ginal lai)pets in yanphania and Xauphantopsis are very different. The 

 horizontal diameter of Xauj)hantopsis is five times that of Nauphmita ; 

 its height certainly from three to four times as great. 



On the exumbrella the gelatinous blocks are convex, and at the pe- 

 ripheral part are very prominent, projecting in a considerable elevation 

 of knot-like shape, slightly incised midway in their breadth, although 

 the incisions are very shallow as compared with similar "shallow fur- 

 rows" in Xanphanta. On the subumbral side of the umbrella two 

 rounded continuations of the gelatinous blocks were noticed as forming 

 the base or basal supports of the marginal lapi)ets. No great varia- 

 tions in size of the gelatinous blocks were noticed. No regular varia- 

 tion by which the blocks which lie in the same radii as the tentacles are 

 larger than those which lie in the radii in which sense-organs lie was 

 observed in the single specimen of Xauphantopsis which was studied. 

 It is certainly not as prominent, if it does exist, as in Hseckel's figures 

 of Xauphanta Challeiujeri, Hceck. 



Nauphantopsis Diomedeje, sp. nov. 



(Plate VI.) 



Bell cap-shaped or high disk-shaped, with walls probably somewhat 

 vertical, as in Linerges. The exumbrella is divided into a central disk 



