Ciiux (88) only just mentions the appearance of Ersaea (Eiidoxia) Bojani in the material 

 •of the Canary Islands. He has therefore acknowledged the similarity with Huxley's and 

 EsciiscHOLTz' pacific specimens, by using the same specific denomination. 



In 92 he first proposes (page 99) "die Benennung Ersaea (Eudoxia) Bojani der pacifischen 

 "Eudoxiengruppe zu belassen und die atlantische Gruppe als Ersaea picta zu bezeichnen". 

 Furtheron he tries to show specific differences between these two Ersaeids. 



Fio-. 6 (page 101) and fig. 7 (page 109) of his work do show differences between Ersaea 

 picta and Ersaea Bojani. Chun on page 10 1 tells us, when he describes the bract oi E. picta 

 that sometimes "gelegentlich neben dem IMittelzahn der Rand mit scharferen Zahnchen aus- 



"gestattet ist". 

 /" "^x As soon as this serrated part near the middle-tooth 



is not visible in some of the specimens, the extraordinary 

 resemblance between fig. 6 and 7 is only too clear, always 

 as concerns the outline of the bract. 



We have copied these two figures of Ciiux's and 

 laid them one on the other, the dotted outlines belong to 

 Ersaea Bojani., the black to Ersaea picta. One sees how 

 especially the basal part of the one nearly fits on the 

 other (textfig. i). 



The phyllocyst of Ersaea picta is absolutely rounded 

 superiorly, nearly eggshaped; that oi Ersaea Bojani \'~, drawn 

 out proximally on the right side of the bract into a more 

 or less tubular canal, which ends sometimes obtusely. This 

 would indeed be a good characteristic difference between 

 these two species, if the Siboga expedition had not brought 

 material in which there are not only Chun's types of fig. 6 

 and 7 but also many gradations from one to the other. 



We just give the outlines of the phyllocyst of 5 

 specimens in our material which clearly show the transition from the Ersaea picta to the Ersaea 

 Bojani-ty^e. (textfigures 2 — 6). 



In this way we do not find any reason for not throwing together Ersaea Bofani and 

 Ersaea picta., keeping the oldest name, given by Eschscholtz as the definite one. 



Part of Chun's description is, as far as we can make out, not quite consequent. When 

 he speaks (on page 99) of using two different specific names for atlantic and pacific Ersaeids, 

 and when furtheron he tries to show the differences in structure between both species, he never 

 ought to have said on page 109 (speaking of material of Ersaea Bojani, caught between the 

 Sandwich Islands and the Carolines, real pacific material) "Was ihre Grbsse, die Form des 

 "Deckstuckes und die Gestalt der Spezialschwimmglocke anbelangt, so stimmen die Exemplare 

 "so vollkommen mit den atlantischen Ersaen iiberein, dass ich auf eine eingehendere Schilderung 

 "die nur Bekanntes wiederholen wiarde, verzichte". And then he speaks of the differences between 

 Ersaea picta and Bojani. We tried in vain to find out exactly what he means. 



l'"ig. I. The sketches given by CiiUN 92 of 

 Ersaea bojani Huxl. (dotted lines) and of 

 Ersaea picta Ch. superposed. 



