132 THE MEDUSAE. 



Rhopalonema funerarium Vanhoffen (>w7i Quoy et Gaimard). 



Rhopalonema funerarium Vanhoffen, :02'', p. 61, taf. 9, fig. 2, taf. 10, fig. 17, taf. 11, 



fig. SI. 

 Rhopalonema coeruleum Maas, : 05, p. 61, taf. 10, figs. 67, 68 {non Haeckel, '79). 

 ? Rhopalonema striatum Maas, '93, p. 15, taf. 1, fig. 3. 



Station 4673 ; 300 fathoms to surface ; fragments. 



Station 4707 ; 300 fathoms to surface ; 3 specimens ; fragmentary. 



Station 4713 ; 300 fathoms to surface ; 1 specimen ; fair condition. 



Station 4715; 300 fathoms to surface ; 1 large specimen ; fragmentary. 



Station 4719 ; 300 fathoms to surface ; 3 specimens. 



Station 4724; 300 fathoms to surface ; 2 specimens. 



None of the present specimens are preserved well enough for me to 

 count the otocysts or tentacles, but the elongated shape of the gonads, the 

 general form and size, and the brilliant iridescence of the subumbrella all 

 indicate that they belong to R. funerarium. None of the specimens were 

 taken on the surface ; a fact supporting the conclusion arrived at by recent 

 students of this species (Vanhoffen, : 02'' ; Maas, : 05) that it belongs to the 

 intermediate fauna. The localities at which it was taken all lie within the 

 course of the Humboldt Current. The geographic distribution of the species, 

 so far as yet known, parallels that of B,. velatum. 



Colobonema Vanhoffen, 1902. 



Trachynemidae with tentacles all of one kind, thirty-two in number, of 

 which the eight perradial, the sixteen adradial, and finally the eight in- 

 terradial develop in succession. It is probable that there are no otocysts 

 in this genus. 



The successive studies of Vanhoffen (:02'') and of Maas (:05) have given 

 us a good understanding of this interesting genus ; and we must thank 

 Vanhoffen for a very beautiful figure of the type species, C. sericeum. 

 The present collection contains several specimens which are clearly iden- 

 tical with the " Valdivia " specimens ; also identical with them, according 

 to Browne (: 06), is a series of this genus from the Bay of Biscay. 

 The case of the "Siboga" specimens is not quite so clear, since they all 

 possessed a much longer proboscis than Vanhoffen observed ; but inas- 

 much as one large specimen, 39 mm. high, in the present series has a 

 proboscis over 10 mm. long, while in all the others it is very short indeed, 



