80 MEMOIR IV. 



do actually undcrg;© Metamorphoses (see Memoir 1st.) of 

 which he has many new proofs to adduce. 



Having stated the several points which shew the Cirri- 

 pcdcs to be true Crustacea, and to be very closely related to 

 the more perfect animals of that Class, I beg to suggest the 

 probability of the Exuviaof the Balani, having led Linnaeus 

 and others into the opinion of the Animal of the Barnacles 

 ( or Triton as he has named it ) living in a separate state in 

 holes of rocks &c.an opinion which the foregoing discoveries 

 must completely annul. The most naked and unprotected of 

 the Barnacle tribe are the genera of Otion and Cineras, and 

 these attach themselves to the superficies of floating bodies, 

 while the only genus known to live deeply imbedded in 

 rocks and stones viz. Lythotria, is provided with a solid 

 calcareous basis, and above with eight equally solid valves. 

 Cuvier appears to be the only Naturalist who had already 

 declared himself of the same opinion: — "Linnaeus supposing 

 that Cirripedes are also found without any shell, gave them 

 the name of Triton, but the existence of these Tritons in 

 nature is not established as certain, and we should rather 

 think that Linnaeus had only seen the animal of some 

 Barnacle (anatifc) torn from its shell." Jlegne Animal, 

 Note, Vol. II. p. 506. 



From a consideration of the whole History of these ani- 

 mals are we to conclude that they have the sexes united ? a 

 fact so much at variance with what we see in all the rest 

 of the Crustacea may authorize a degree of scepticism, for 

 although they are fixed for life when they put on their 

 permanent disguise, yet from their associated or clustered 

 mode of growth, and from the extreme length of the tubular 

 organ which terminates the body above, they may still ap- 

 pear capable of communicating with each other : dissection 

 however favors the former idea, for the oviduct of each side, 

 formed by the union of branching tubes from the various 

 lobes of the ovary, becomes suddenly bulky, gland-like and 

 tortuous, and has been thought to represent the male organ. 



