268 



by Mr. Henry Goodsir in the " Edinburgh New Philoso- 

 phical Journal for 1843," where he erroneously described 

 the female, or the animal represented in our right-hand 

 figure, as the male of the cirriped (Balanus Lalanoides) , 

 and the animal, copied in our left-hand figure, as being 

 parasitic upon that supposed male. 



About the time of the publication of a memoir in the 

 "Annals of Natural History," " On the Development of 

 the Cirripeds," in 1851, our attention was drawn to a fleshy 

 mass of material that we found attached to the base of 

 the animal of the Balanus balanoides, lying within the 

 shell. This we first took to be the ovisac of the Balanus, 

 because we found it always full of ova, which we then 

 thought were the ova of the Balanus in one particular 

 stage. In this we thought we were confirmed by the 

 fact that we never found the ova of Balanus in the condi- 

 tion most familiar to us in any of those specimens where 

 these ova were found. A drawing of the mass, which 



DEVELOPMENT OF LARVA OF CUYPTOTHLRIA BALANI. 



we submitted to Mr. Darwin, induced him to suggest it 

 as being the parasite that Mr. Goodsir described as the 

 male of the cirriped ; and an examination of the article 

 " On the Sexes of the Cirripeds," clearly showed us that 



