(sect, e), balanus balanoides. 267 



Section e. 

 Basis membranous. 



29. Balanus balanoides. PL 7, fig. 2a — 2d. 



Lepas balanoides. Linn. Fauna Suecica, 1746, et Syst. Naturse, 



1767. 



— — 0. Frabicius. Fauna Groen., p, 424, 1780. 



— — et clavatus. Montagu (!). Test. Brit., 1S03. 

 Balanus vulgaris (?) Da Costa. Hist. Nat. Testacea, PI. 17, 



fig. 7, 1778. 



— ovulams et elongatus. Aug. Gould (!). Report, Inverte- 



brata of Massachusetts, figs. 

 7 and 8, (1841). 



— PUNCTATUS, CYLINDRICUS, ELONGATUS, EISTULOSUS CLA- 



VATUS. Audorum variorum. Sed non B. punctatus, 

 Bruguiere, Encyclop. Method., et non B. punctatus, 

 Montagu, Test. Brit. 



Parietes either solid, or cancellated, or rarely formed by 

 a single row of pores. Tergum, with the spur bluntly or 

 sh arply po in ted. 



Var. (a) ivith the parietes permeated by tubes ; spur of tergum 

 sharply pointed ; segments in the posterior pairs of cirri, bearing from 

 eight to ten pairs of spines. 



Habitat. — Great Britain, France, Norway, Shetland Islands ; Greenland, ac- 

 cording to O. Fabricius; North America,, in lat. 66° 34' N. ; Labrador; Nova 

 Scotia ; Massachusetts, Delaware. Extremely common, attached to rocks, 

 shells, and wood, within the tidal limits. 



I have no doubt that the present species is the Lepas 

 balanoides of Linnseus ; though O. Fabricius is the only 

 author who gives, in his " Fauna Groenlandica," a sufficient 

 description for the species to be recognised with certainty. 

 I believe this also is the B. balanoides of Bruguiere, though 

 he is in error, as far as my experience goes, in stating that 



