MEDUSA. I. 



During the cruise of the "Tjalfe" to the west-coast of Greenland in 1909 seven medusae were 

 found in deep water in the Davis Strait; they were identified by me as belonging to the species here 

 dealt with and shortly mentioned with the name proposed by Mayer, Thaumantias rubrurn (Kramp 

 1913), and with the same name I included the species in my list of the medusae of Greenland in 

 "Conspectus Faunae Groenlandicae" (Kramp 1914). A more detailed description of this interesting 

 medusa was postponed, till I had examined the specimens, taken on the "Michael Sars" North-Atlan- 

 tic Deep-Sea Expedition 1910; these specimens had already arrived to me in the Zoological Museum. 

 As my paper on the "Michael Sars" medusae has not yet been printed (cf. p. i), I have given the de- 

 scription in extenso in the present paper and, moreover, added several new observations, made on 

 the material from the "Tjalfe" and on two specimens collected during the cruise of the "Thor" 

 in 1904. During the cruise of the Norwegian motor-schooner '-Armauer Hansen" in the Atlantic 

 in 1913 5 specimens of the same species were found, which I had the opportunity of examining in 

 Bergen in 1916. 



Altogether 34 specimens of this medusa are known up to now. 27 of these specimens have 

 been at my disposal for examination. 



In the following complete list of the localities, where the species has been found hitherto, the 

 localities are arranged in the following manner: i. the Greenland occurrences from the North towards 

 the South, 2. the Atlantic occurrences from the West towards the East. 



Lat. 65 N., Long. 54 W., about 40 miles west of Napparsok on the west-coast of Greenland. 

 June I3th 1843. Surface. H. P. C. M011er. i specimen. 



Lat. 64o6' N., Long. 55i8' W., Davis Strait. May 8th 1909. Depth 1046 noom. Ringtrawl, 

 1200 m wire. "Tjalfe" stat. 336. 4 specimens, n 17 mm wide with 15 18 tentacles (for further 

 details, see Kramp 1913 p. 267). 



Lat. 63i8' N., Long. 5455' W., Davis Strait. May 7th 1909. Depht 1300 m. Ringtrawl, 1530 m wire. 

 "Tjalfe" stat. 333. 3 specimens, 9 15 mm wide. 



Lat 3957' N., Long. 7Oi5' W., 91 miles S '/* E of Martha's Vineyard, New England. August 

 23rd 1881. Depth ii74m (642 fms.). U. S. Fish Comm. stat. 954. (Fewkes 1882). --2 specimens. 



Lat 3952' N., Long. 6945' W., iO4'/ 2 miles S. by E. x /a E. of Martha's Vineyard, New England. 

 August 4th 1881. Depth 1289 m (705 fms.). U.S. Fish Comm. stat 936. (Fewkes 1882). -- 5 specimens. 



Lat. 4259' N., Long. 5ii5' W., southern edge of the Newfoundland Bank. June 3oth 1910. 

 Depth 1 100 m. Ringtrawl, 700 m wire. "Michael Sars" stat. 70. - - i specimen, diameter 23mm. 



Lat. 4734' N., Long. 43!!' W., eastern slope of the Newfoundland Bank. July nth 1910. Depth 

 about 2000 m. "Michael Sars" stat. 80. - - a. Young-fish trawl, 1000 m wire. 2 specimens. b. Ring- 

 trawl, 1500 m wire. 2 specimens. 



Lat 4802' N , Long. 3955' W. July i2th 1910. "Michael Sars" stat. 81. - - a. Ringtrawl, 100 m 

 wire, i specimen. b. Young-fish trawl, looom wire, i specimen, diameter about 17 mm, about 20 tent- 

 acles. c. Young-fish trawl, 2000 m wire, i specimen, diameter 16 mm. 



Lat 4824' N., Long. 3653' W. Juli i3th 1910. "Michael Sars" stat. 82. - - a. Young-fish trawl, 

 loco m wire, i specimen, diam. 21 mm. -- b. Young-fish trawl, 2000 m wire, i specimen. 



