SPH^RONECTES. 51 



The absence of the hydrophyUia may have been accidental, but it does not seem easy to 

 comprehend how any second nectocalyx could exist in this genus, at least, in its ordinary 

 place attached to the proximal end of the ccenosarc. 



From the description contained in Lesson's 'Acalephes' I formerly imagined that this was 

 the Rmacea^ of Quoy and Gaimard, but it is clear that this species, though presenting many 

 points of resemblance with Prai/a (= Rosacea, Q. and G.), cannot be included in that genus ; 

 the tubular form of the hydroecium and the very large proportional size of the nectosac 

 at once excluding it. I have, therefore, established a new genus for it, and I propose to call 

 this species S. KoUikeri, after the distinguished author of 'Die Schwimmpolypen von Messina,' 

 and of so many other valuable contributions of science. 



* See ' Reports of the British Association,' 1851, p. 79. 



