Notes on Mcduscc of the Western Atlantic. 149 



In the above reference to the absence of nematocysts from the lips of the 

 older species, it is purely negative evidence that governs. Nettling organs 

 so large and conspicuous as those which stud the lips of the Tortugas species 

 would hardly have been overlooked by the careful observers who have 

 described the genus. 



The species pcronli of A glow a? established by Leukart, appears to be 

 the same as that for which we already had the name hemistoma Peron. 



It should not be inferred from the application of the name ciliata to this 

 new species of Aglaura that the presence of cilia is peculiar to this one 

 species of the genus. In the figures of A. hemistoma which accompany 

 the descriptions by Leukart and MetschnikofP the lips are represented as 

 being lined with large and numerous cilia. 



1 Es ist dieselbe fiir die ich hier mit unterdruckung des ziemlich nichtssagenden 

 Speciesnamens die obige Bezeichnung gewalt habe." Leukart, loc. cit. 

 - Metschnikoff, E. 1886. Arbeiten Zool. Inst., Wien, Bd. vi, Hf. II. 



ii 



