88 CTENOPHORA. 



the pleasure of seeing it catching the latter in the nsnal \va\-. Of course, the Bolina glided out again 

 the opposite way; — it reminded nie of the horse of Miinchhausen! — It being on one of the last 

 days of my sta\' at the Trondhjem v'^tation I could not substantiate, whether the specimen thus muti- 

 lated was able to regenerate the lost main part of its body. 



In a pair of the larger specimens caught in the Skagerak I have found Tlyperia, one specimen 

 in each. It would seem to be the same parasite, which was observed by Sars (Op. cit. p- 32), though 

 he states that they were alwa\s found attached to the combs. 



Specimens of Beroe aicnmis were taken by the "Ingolf '-Expedition on the following stations: 



Station II. (64° 34' N. 3i°i2'W.) i small .specimen. 



— 52. (63° 57' - 13° 32' - ) I — - 



— 80. (61° 02' - 29° 32' - ) I — — 



— 96. (65° 24' - 29° 00' - ) I — - 



— 140. (63° 29' - 6° 57' - ) I large — 



Further a small specimen was taken at 61° 32' N. 10° 47' W. (betwen stations 45 and 46). 

 Besides, the occurrence of Beroids is noted in the Journal of the Expedition at a number of 

 other stations; as, however, it cannot be said with full certainty that these must have been Bcroe 

 cnciiinis, it has been thought better not to name these stations. Also on the "Danmark" Expedition it 

 was observed at North East Greenland (75° 7' N. 9° 23' W.) in August 1906, numerous specimens, in all 

 sizes. In March 1907 some large specimens were observed in an opening in the ice, an interesting 

 observation, showing the occurrence of the species under the ice. 



This species has quite a cosmopolitan distribution, occurring in the arctic and antarctic, as 

 well as in the tropical seas. Regarding its bathymetrical distribution very little is known. Only 

 Damas & Koefoed (Op. cit. p. 415) state that it extends beyond the depth of 200""). 



The following species have been recorded from the North European Sea.s, but there is no 

 definite proof as yet, that they really occur there. As set forth below (p. 95) it is, however, b>- no 

 means improbable that they — and perhaps some other southern forms — will prove to occur there 

 under certain hydrographical conditions. A few notes may be given on these forms. 



Hormiphora plumosa (M. Sars). Edw. J. Bles in his "Notes on the Plankton observed at 

 Plymouth during June, July, August and September 1892" (Journ. ?klar. Biol. Assoc. II. N. S. 1892. 

 p. 340) mentions Horviipkora phniiosa as "the Ctenophore common at Plymouth". That this is simpl}' 

 a wrong identification of Plcurobrachia pilr/is is beyond doubt, as might be concluded from the fact 

 that he does not mention the latter as occurring there. Dr. E. J. Allen has also kindly informed 

 me that Blcs was mistaken herein; PleiirohracJiia pilnts is common at Plymouth, together with 



I) The differential catches recorded b)' R. T. Giinther (Op. cit.) afford no certainty of the depth at which Bcroe 

 cucumis (ovata) and other unidentified Ctenophorcs were taken. Tlie statement that a specimen of Bcroi- ovata was taken 

 "between 1510 fathoms and the surface" is certainlj- not of much value. Closing nets alone can give fully reliable results in 

 regard lo the bath^nietrical distribution. 



