THE SESSILE BARNACLES. 205 



BALANUS HAMERI (Ascanius). 



Plato 53. 



17G5. Lcpas balanus uddcwallcnsis LINN/EUS, Reison (lurch Wostgothland, 



Erklarung die Figuren, pi. 5, fig. 1, Ib. 



1767. Lcpas liameri ASCANIUS, Icones rerum naturalium, vol. 1, p. 8, pi. 10. 1 

 177G. Lcpas tulipa O. F. MULLER, Zuologire Danica Prodromus, p. 251, 



No. 3026. 

 1790. Lcpas foliacca SPENGLER, Skrivter af Naturhist. Selskabet, vol. 1, 



p. 173. 



1798. Lepas rosata BOLTEN, Museum Boltenianum, p. 197. 

 1827. Balanus scoticus BROWN, Illustr. Conch. Great Britain and Ireland, 



pi. 6, figs. 9-12. 

 1835. Balanus ttihpa Mailer, LYELL, Philos. Trans., p. 37, pi. 2, figs. 34-39 



(Uddevalla, west coast of Sweden). 



1835. Balanus uddcvallcnsis auct., LYELL, Philos. Trans., p. 37. 

 1844. Balanus candid us BROWN, 111. Rec. Conch. Gt. Brit., ed. 2, p. 121, pi. 



54, figs. 9-12. 



1854. Balanits liamrri Ascanius, DARWIN, Monograph on the subclass Cir- 

 ripedia, Balanidne, p. 277, pi. 7, figs. 5-c; Monograph of the 



fossil Balanidne and Verrucidre of Great Britain, p. 24, pi. 1, 



figs, la-d; pi. 2, figs. 1, b. 

 1866. Balanus hamcri Ascanius, LEIDY, Proc. Acad. Nat. Sci. Phila., 1866, 



p. 237 (Bangor, Maine, Leda clay). 

 1872. Balanus Jiameri Ascanius, DAWSON, Canadian Naturalist, vol. 6, 



p. 402. 

 1889. Balanus liameri Ascanius, DAWSON, Canadian Record of Science, 



vol 3, p. 287 (distribution in the Pleistocene of Canada). 

 1900. Balanus liameri Ascanius, WELTNER, Fauna Arctica, vol. 1, p. 303, 



pi. 8, figs. 14, 15. (Distribution). 

 1913. Balanus hamcri Ascanius, STEPHENSEN, Medelelser om Greenland, vol. 



51, p. 71 (North Stroemfjord, Greenland). 



Type-locality. Finmark. 



Distribution. Northern Europe, south to the English Channel; 

 Nova Scotia to off the mouth of Chesapeake Bay, 16 to 167 fathoms; 

 southward only in deep water. 



The barnacle is large, cylindrical, or somewhat tapering, some- 

 times enlarging upward; the walls white, under a yellow cuticle 

 which covers parietes and radii; compartments smooth, very weakly 

 cemented together and to the strong calcareous basis. Orifice large, 

 deeply toothed, radii very broad, covered with epidermis, with 

 smooth, strongly oblique, straight summits and smooth sutural 

 edges. Alse broader with arched summits, the edge with a narrow 

 longitudinal groove in some individuals, obsolete in others. Sutures 

 not in the least septate or denticulate. Sheath smooth, its lower 

 edge overhanging, leaving very narrow cavities. The parietes below 

 the sheath are longitudinally -finely and sharply riUbed throughout, 



1 1 have been unable to consult the original edition of the first part of the Icones of 

 Ascanius, and quote the reference from the reprint of 1772. 



