48 



as „lange Elaschen" (distinguished by the letter e), it will be seen 

 that they are furnished with a basal peduncle, and that the top of 

 the taster is somewhat extended and pointed. In his description 

 of the tasters, Fewkes says that ,,the most marked peculiarity in 

 their anatomy is the existence of an ,,oil globule" near their base." 

 'i'his „oil globule" is drawn by the wiiter mentioned and will be found 

 on pi. n tig. 7. Nothing corresponding to this is found in Saes's 

 pi. o tigs. 2, .3. To discover if any such „oil globules" exist in 

 Cupulita sarsi I examined the remains of a specimen from Tromsø 

 sound. It was at once evident that while the majority of the various 

 organs as usual fell to the bottom of the glass, there wei-e a few 

 •small bits which remained on the surface of the preserving fluid (for- 

 malin). On closer examination, it was found that the little pieces 

 floating on the surface were tasters M-hich had risen to the top on 

 account of their oil globules. Here too, there appears to be a ditte- 

 rence between the two species under discussion. While the oil globules 

 of C. rcira according to Fewkes are sessile, those of C. sarsi are 

 provided with a short peduncle. It is possible that the reason, 

 w liy the oil globules do not appear on Sars's pi. 5 flgs. 2, 8 is 

 that they so easily burst on being touched. Saks has, however, 

 given a drawing (pi. (5 fig. 11) of a taster with oil globule, which 

 he considers to be „eine seltene Form der ovalen Blaschen", while 

 the oil globule itself is described as „Kugeliger Anhang". These 

 oil globules are most likely intended to act as a kind of hydrostatic 

 apparatus. 



As will be seen from the foregoing, differences can clearly be 

 pointed out between C. cara and C. sarsi, and it is probable that 

 they represent two diiferent species which are, however, very similar. 

 The fact of C. sarsi being found in large quantities in the winter 

 in such fiords as Lyngen, Kvænang and .Jøkel would seem to indicate 

 that it is an arctic form, but one cannot be sure of this until its 

 distribution is more clearly defined. 



Plujsophora horcall-^. M. Saes. 

 PI. IV, Figs. 1, 2. 



In The Mosken current (^loslcciisd'ommen) several specimens 

 of a Physophora were found sw innniiiu iiliout near the surface, on 

 March 1st 1899. On comparing ^[. .Sauss drawings and descrip- 

 tions'), I was convinced that it was his species which I had found. 

 It has been thought that horealis was identical to Physophora hydro- 

 statica of the Mediterranean, but this is, however, not altogether 

 so sure as to be beyond doubt. If this should be proved to be the 

 case Sars's name; would have to give way foi' the older one. liyilro- 

 statica, Forsk. 



M. Saks himself had an oi)portunity of comparing the Meditei'- 

 ranean form with the one he describes (1. c. p. 33) and it seems 

 tiiat he was acquainted with Claus's, Gegenbaur's and Kolucker's 

 reseai'ciies and examination of the former species. And as lie still 

 maintained that they wer'c dittei'ent, there is evci'v i-eason to be 

 wary before one concludes that they are not so. 



M. Saks says, on page 40, „None of the urticary knobs ob- 

 served by me shewed more than .'j spii-al coils; bul ("i.ais (1. c. 

 p. 26, fig. 26)-) in P. hyilrustatica delineates '.) — 10 of them, and 



1) Fauna littoralis Norvegiæ, li. ;i. p. 32, pi. V, VI figs. 1—8. 

 -) TJeber Physophora hydrnstatka nebst Bemerkuiigen uebev aiulei-e Siplioiio- 

 en. Sep. Abdruck aus Zeitsclir. l', wiss. Zoologie. 10 B. 



Gegenbaue remarks that the spiral in the most perfect urticary 

 knobs becomes decomposed and lies twisted together in irregular 

 coils, which is also apparent in some of the specimens brought home 

 by me from the Mediterranean." 



In horealis too during the development of the tentacular knob, 

 a dissolution of the spiral coils of the enidoband takes place, after 

 which they are reformed into irregular coils. 



On PI. IV fig. 1 in the present work a tentacular knob with 

 spiral twisted enidoband Mill be seen, while fig. 2, depicts a later 

 stage, the spiral being unwound. I have observed intermediate 

 stages between these two. 



A thoroughly developed tentillum is depicted on Saes's pi. VI, 

 fig. 7. 



If it is a fact that the Coil unwinds itself in P. hydrostatica, 

 then the figure given by Claus (pi. 26, fig. 26) cannot designate „ein 

 vollkommen entwickelter Nesselknopf". But even if on this point 

 there is a similarity, there would still remain the dissimilarity that 

 during development the spiral twist in the tentacular knobs are more 

 numerous in hyiho^inticit than in horealis. 



Craspedota. 



(Notes and identification aie due to Di-. Edward T. Browne, 

 University College, London I. 



Aeqiiorea sp. 



V<; 1S99. Moskenstrommen o. m. 

 This is probably a new species. 



Aijhmthd diyitnlis. Mvllee. 



--/a 1899. NW of Kost (Lofoten), 3 specimens. 



This is a northern species. Recorded from (jreenland, Norway, 

 Faeroe Channel and in the North Atlantic by the „National" Plank- 

 ton Expedition. There is no evidence that it has been taken south 



of al)out latitude .58". 



Aijlautha rosea, Foebes. 



"A 1900. The Skjerstad Fiord IV, 0—330 m., 1 siiccimen. 

 — ., — ., V, 0—420 m., 1 specimen. 



This medusa got mixed up with A. digitalis until I found out 

 (1898) that it Jiad eight sense organs. {A. digitalis has only four). 

 Recorded tVoui The British Isles and Hehgoland. 



Ptychogastria polaris, Alman. 



74 1900. Folden Fiord, 3 specimens. 



74 1900. The Skjerstad Fiord IV. 0—330 m., 1 specimen. 



74 1900. .. — „ VIL, 0—490 m., 2 specimens. 



This medusa was taken in Discovery Bay in Grinnel Land, up 

 Smith Sound on tlu' west side of Greenland. (Pectyllis arctica from 

 (ireeniand and off Jlalifax-CiinllonL'or Exped.). 



J-fomi)ociii-iiiit idatygoiwii, Maas. 



74 1900. The Skjei'stad l-'iord V, — 420 m., 1 specimen. 

 74 1900. „ — ,, VII, 0—490 m., 2 specimens. 



H. platygonon was taken by the „Nationar' Plankton Expedition. 

 The station is omitted in the Report. 



