]54 P- L. Kramp 



The specimens in our collection are derived from the following localities: 

 (72, 73) 14° N. 20° W., near Cape Verde Islands; Prosch. 15 specimens, type 

 specimens of Cytaeis nigritina. 



(74) 8°30'N. 24° W., south of Cape Verde Islands; Andrea, 1872. 2 specimens, 



labelled Nigritina atlantica. 



(75) 31° 28' N. 29° 39' W., south of the Azores; Andrea, 1860. 5 specimens, 



labelled Nigritina sp. 



(76) 5° S, 28° W., off Cape San Roque, east coast of Brazil; Hygom. 2 speci- 



mens, labelled Nigritina sp. {polyblasta ?). 



(77) 23° 03' N. 31° 48' W., N.W. of Cape Verde Islands; Mathiesen, 1848. 



2 specimens, labelled Nigritina atlantica. 



(78) 5° 31' N. 23° 15' W., south of Cape Verde Islands; Reinhardt. 1 specimen, 



labelled Nigritina atlantica ( ?). 



(80) 34° N. 34° W., S.W. of the Azores; Hygom. 1 specimen, labelled Nigritina 



{polyblasta'}). 



(81) 6° N. 22° W., south of Cape Verde Islands; Hygom. 3 specimens, labelled 



Nigritina (polyblastal). 

 (89) Atlantic Ocean; Hygom, 1863. 1 specimen, labelled Cytaeis nigritina. 

 Before the publication of his book Haeckel had evidently been much in doubt 

 of the most convenient name of this species. The specific name polyblasta, applied 

 to some of the specimens in the list, is found nowhere in the monograph; he may 

 have thought about attaching this name to specimens carrying medusa buds. 



Cytaeis macrogaster Haeckel. 

 1879, p. 74, PI. VI, fig. 1. 

 [Cytaeis tetrastyla Eschscholtz.] 

 It is generally acknowledged that C. macrogaster is merely a synonym of C. tetra- 

 styla, and an examination of the present specimens confirms this view. 



(83) 0° S. 29° W., Andrea, 1866. 2 specimens, designated as the types. 



(84) 1° 20' S. 26° 20' W. Andrea, 1863. 1 specimen. 



(85) 2°30'N. 24°W. Andrea, 1863. 4 specimens. 

 (87) 1° 30' N. 24° W. Andrea, 1863. 3 specimens. 



All these localities are at a considerable distance N.E. of Cape San Roque on the 

 east coast of Brazil. 



Margelis principis Steenstrup. 

 1879, p. 88, PI. VI, figs. 14-16. 

 The specimens labelled Margelis principis belong to two different species: Bougain- 

 villia principis Steenstrup, and B. superciliaris L. Agassiz. 



(3) Sandvaag, Faroe Islands; Steenstrup, 1844. The type-specimen of Margelis 

 principis. 



(5) Davis Strait off Holsteinsborg; Olrik, 1859. 7 specimens. 



(6) Godhavn, Greenland; Olrik, 1860. 1 specimen. 



The specimens from the two last mentioned localities are Bougainvillia superciliaris. 



No. 50 in the list, north of Orkney Islands, collected by Olrik, 1859, is likewise 



identified by Haeckel as Margelis principis, but the specimens are not in the collection. 



