CIRRIPEDES. 8 1 



published two thick volumes,* describing all the known 

 living species, and two thin quartos on the extinct 

 species. I do not doubt that Sir E. Lytton Bulwer 

 had me in his mind when he introduced in one of his 

 novels a Professor Long, who had written two huge 

 volumes on limpets. 



Although I was employed during eight years on 

 this work, yet I record in my diary that about two 

 years out of this time was lost by illness. On this 

 account I went in 1848 for some months to Malvern 

 for hydropathic treatment, which did me much good, 

 so that on my return home I was able to resume work. 

 So much was I out of health that when my dear father 

 died on November i3th, 1848, I was unable to attend 

 his funeral or to act as one of his executors. 



My work on the Cirripedia possesses, I think, con- 

 siderable value, as besides describing- several new and 



o 



remarkable forms, I made out the homologies of the 



o 



various parts I discovered the cementing apparatus, 

 though I blundered dreadfully about the cement glands 

 and lastly I proved the existence in certain genera 

 of minute males complemental to and parasitic on the 

 hermaphrodites. This latter discovery has at last been 

 fully confirmed ; though at one time a German writer 

 was pleased to attribute the whole account to my 

 fertile imagination. The Cirripedes form a highly 

 varying and difficult group of species to class ; and 

 my work was of considerable use to me, when I had 

 to discuss in the * Origin of Species ' the principles of 

 a natural classification. Nevertheless, I doubt whether 



* Published by the Ray Society. 

 VOL. I. G 



