lO 



sagittata as Chun described it. For the reasons, stated above, we think it right to maintain our 

 specific determination "asymmetrica". Bedot's specimens assuredly possess this same structure, 

 though this is not indicated by him. We are sure that as soon as Chun pubHshes figures of his 

 Ceratocymba sagittata, every one will be struck by the differences which e.xist in his Ceratocyniba 

 and in Bedot's and ours. 



We know no more than Ciiux or Bedot, which relation this unknown Etidoxid bears to 

 other Siphonophores. The material of the Siboga expedition did not throw any light on this matter. 



As Bedot's description is very incomplete and short, we thought it necessary to give 

 some details of the structure of the bract, which was very well preserved in our specimen. 

 The same cannot be said of the gonocalyx. 



We will first describe the bract and show the differences with the other Ceratocymba, 

 of which not one specimen was caught by the Siboga expedition. 



a" a 



Figg. 7 — II. Ceratocymba asymmetrica nov. sp. Different facets of the phyllocyst. 

 Fig. 7: facet .\, Fig. 8^: facet B, Fig. 8/;: facet C, Fig. 9: facet D, Fig. 10: facet E, Fig. 11: facet F. Figg. 7 — 11 X 5- 



The Bract, Length 7 — 8 mm. Breadth 4V4 — 6'/^ mm. 



The bract of Ceratocymba asymmetrica is composed of six facets. 



On the top is an irregularly four-sided facet called A (textfig. 7), of which the angles 

 are blunt {a\ b\ c\ d'). 



The facet A has an oblique position. The angle a' is situated more to the dorsal side of 

 the bract than the angles d' and b' and these on their part form the gradual transition towards 

 the absolute ventral position of the angles c and d' . The most proximal ridge / (between c' 

 and d'') is longest, a little curved. The next in length is ridge e. If the bract had been sym- 

 metrical, ridge e would have been divided into two halves, each having the same length as 

 the ridges g and Ji and the facet would have been regularly 5-sided. Ridge _<,'" and // are a 

 little curved and convex. 



This facet A is situated on the top of the bract. 



On the ventral side we see a facet B (.see textfig. 8^^) of which y is the upper ridge. 

 Opposite f is ridge /■ which is somewhat longer but it is not regularly shaped. In the middle 

 it is very much notched. This may possibly be an effect of preservation as the bracts of 

 Ceratocymba are very delicate and each facet thin and membranous. 



