158 P- L. Kramp 



Mesonema macrodactylum Brandt. 



1879, p. 226. 

 [Aequorea macrodactyla (Brandt)] 

 Besides the specimens mentioned above the collection contains one specimen of 

 Aequorea macrodactyla, of which the label has been lost. It must have been derived 

 from one of the following two localities, to which Haeckel has added the determina- 

 tion Mesonema macrodactylum: 



(155) 2° 04' N. 106° 50' E., near Singapore; Andrea, 1869. 

 (157) 10 miles south of Sunda Strait; Bardenfleth, 1875. 

 The specimen is about 50 mm in diameter, with about 125 radial canals and about 

 19 tentacles. None of these localities are mentioned in the monograph. 



TRACHYMEDUSAE 



Pectyllis arctica Haekel. 

 1879, p. 266. 

 [Ptychogastria polaris Allman.] 

 (148, 149) Proven, about 72° 20' N. on the west coast of Greenland; Olrik, 

 1860. 5 specimens. 

 Besides these specimens Haeckel examined a specimen taken near Halifax by the 

 Challenger expedition in 1873. When he described the species, in 1879, he was not 

 aware that in the previous year it had been described by Allman as Ptychogastria 

 polaris. 



Aglantha digitalis. 

 1879, p. 272. 

 [Aglantha digitale (O. F. Muller).] 

 In the list this species is recorded from numerous localities; specimens are still 

 retained from the following: 



(24) 58° 17' N. 30° 59' W. Olrik, 1859. 6 specimens. 



(30) 59° 07' N. 13° 32' W. Moberg. 10 specimens. 



(31) 57° 32' N. 33° 31' W. Olrik, 1859. 5 specimens. 



(32) Northern Atlantic Ocean; Olrik, 1860. 6 specimens. 



(35) 58-59° N., between Iceland and Greenland; Rink. 2 specimens. 

 (37) Ritenbenk, about 69° 40' N. on the west coast of Greenland; Andersen, 

 1862. 3 specimens. 



(40) 58° 27' N. 26° 43' W. Moberg, 1857. 4 specimens. 



(41) 57° 48' N. 43° 45' W. Olrik, 1861. 1 specimen. 

 (128) 57° 43' N. 27° 03' W. Bang, 1868. 8 specimens. 



(130) Davis Strait, off Disco, about 69° N. Olrik, 1862. 10 specimens. 

 (132) Godhavn, Disco, about 69° 12' N. Moberg, 1857. 1 specimen. 

 (134) Umanak, about 72° 40' N,, West Greenland; Brockdorff. 1 specimen. 

 Haeckel altered O. F. Muller's original spelling of the specific name digitale to 

 digitalis. 



Haeckel has also added the name to two coloured sketches by H. P. C. Moller, 

 made at Fiskenasset and Godthaab in Greenland, 



