A revision of Ernst Haeckel's determinations of a collection of Medusae 1 55 



Haeckel's figures of Marge/is principis are said to be based on specimens from 

 Iceland, but no Icelandic locality is mentioned in the list. 



Hippocrene platygaster Hacckel. 

 1879, p. 91. 

 [Bougainvil/ia platygaster Haeckel.] 

 (107) 25= 04' S. 27° 26' W., S.W. of the islands of Trinidad; Andrea, 1869. 

 2 specimens, one of which 1 have designated as the type; by Haeckel 

 himself named H. platygaster n.sp. 

 (1 10) 24° N. 33° W., about 700 miles N.W. of Cape Verde Islands; Iversen, 1871. 

 1 specimen, labelled Marge/is (platygasterl). 

 In my report on the Hydromedusae of the Discovery expedition (in press), I have 

 dealt with this species at some length. Numerous specimens were collected by the 

 Discovery in the tropical parts of the Atlantic and off the east coast of Africa, and it 

 was also taken by the Dana in some localities in West-Indian waters. In my opinion 

 BougainviUia platygaster is a valid species, distinct from B. carolinensis (McCrady), 

 B.fulva Agassiz and Mayer, and B. niobe Mayer. I found that B. platygaster exhibits 

 a most peculiar form of asexual propagation and, as a matter of fact, this same form 

 of propagation is also observed in one of Haeckel's own specimens (No. 107), but it 

 seems to have escaped his attention; at any rate, he does not mention it in his 

 description. 



Hippocrene superciliaris. 

 1879, p. 92. 

 [BougainviUia superciliaris L. Agassiz.] 

 (1, 2 and 4) 66° 13' N. 55 05' W., off South Stromfjord, Greenland; Moberg. 

 12 specimens. 

 These specimens really belong to B. superciliaris, as also some of the specimens 

 erroneously identified as B. principis (see above). 



Nemopsis heteronema Haeckel. 

 1879, p. 93, PI. V, figs. 6-9. 

 [BougainviUia principis Steenstrup. , 

 (7) Iceland; Steenstrup, 1839. 2 specimens. 

 Haeckel described these specimens together with some others from Norway 

 collected by himself. As previously pointed out by me (Kramp, 1926, p. 48; 1939. 

 p. 6) the specimens from Iceland belong to BougainviUia principis (Steenstrup). 



Rathkea fasciculata. 

 1879, p. 97. 

 [Kollikerina fasciculata (Peron & Lesueur).] 

 (151) Mediterranean; Keferstein and Ehlers. 

 In the list as well as on the label this specimen is named Lizzia kollikeri Gegenbaur, 

 but in the monograph the name is altered to Rathkea fasciculata. 



