CONCHODERMA AURITA. 141 



carina, however, is always less developed in C. aurita ; 

 even the colouring in both tends to follow the same 

 arrangement. The only obvious distinction between the 

 two species, are the ear-like appendages of C. aurita, 

 which, however, are not developed in its early age, are 

 subject to considerable variation, are of no high functional 

 signification, and are indicated in C. virgata by two 

 prominences on the same exact spots. On these grounds 

 I conclude, that the generic separation of the two species 

 is quite inadmissible. 



1. CONCHODERMA AURITA. PL III, &&. 4. 



Lepas aurita. Linn* Systema Naturae, 1767. 



Otion Cuvieranus (!) Blainvillianus (!) Bellianus (! )Dumer- 



illtanus (!) Rissoanus. Leach. Encyclop. Brit., 



vol. iii, Supp., 1824, and Zoological Journal, vol. ii, 



p. 208, July 1825. 

 Otion depressa et saccutifera. Coates. Journal Acad. Nat. 



Sci. of Philadelphia, vol. vi, p. 132, 1829. 

 Otion auritus. Macgillivray . Edinburgh New Phil. Journal, 



vol. xxxviii, 1815. 

 Lepas leporina. Poll. Test, utriusq. Sicil., pi. vi, fig. 21, 



1795. 

 Lepas cornuta. Montagti. Linn. Trans., vol. xi, p. 179, 1815. 

 Conchoderma AURiTUM et LEPORiNUM. Olfers. Magaz. der 



Gesell. Ereunde zu Berlin, 3d Quartel., p. 177, 1814. 

 Branta aurita. Oken. Lehrbuch der Naturgesch., Th. 11, 



p. 362, 1815. 

 Malacotta bivalvis. Schumacher. Essai d'un Nouveau Syst., 



&c, 1817. 

 Gymnolepas Cuvierii. Be Blainville. Diet, des Sc. Nat., Art. 



Mollusc, Plate, fig. 1, 1824. 



* Many authors (Poli, Montagu, &c. 3 ) have doubted from the strangely 

 mistaken description, viz., "ore octovalvi dentato," whether this species 

 could be the Lepas aurita of Linnseus. But in the Linnean Society, there is a 

 proof plate from Ellis's " Account of several rare Species of Barnacles," in 

 'Phil. Trans.,' 1758, with an excellent figure of the C. aurita, and on the 

 margin in Linnseus's handwriting is the name Lepas aurita. 



