BALANUS. 25 



Balanus candidus. (Tab. emendata) Brown. Conch. Great Britain (1827), Tab. 6, 



figs. 9 and 10,and2dedit. Tab. 54, figs. 9-12. 

 — tulipa. Lyell. 1 In Phil. Transact., 1835, p. 37, Tab. 2, figs. 34-39. 



B. nee parietibus, nee basi, nee radiis ports perforatis ; testa alba; radiorum margini- 

 bus superioribus obliquis, lavibus, arcuatis ; aciebus suturalibus lavibus ; scuto angusto 

 longitudinaliter, debiliter striato ; tergi calcare angusto, rotundato. 



Parietes, and basis, and radii not permeated by pores ; shell white ; radii with their 

 oblique summits smooth and arched ; sutural edges smooth ; scutum narrow, feebly 

 striated longitudinally ; tergum with the spur narrow, rounded. 



Fossil in Red Crag (Sutton), Mus. S. Wood Doubtfully in the Glacial beds of Scotland. In the 

 Glacial deposits at Uddevalla, in Sweden ; and Beaufort, Canada, Mus. Lyell. Banks of the Dwina, 

 Russia, Mus. Murchison. Greenland, "in blue clay," according to Spengler. 



Recent on the Coast of Yorkshire ; Scotland ; Galway, Ireland ; Isle of Man, and Anglesey, twelve 

 fathoms. Generally in deep water; not very common. George's Bank, Massachussetts, United States. 

 Iceland, Finmark, and the Faroe Island, according to Spengler. Attached to Crustacea, mollusca, stems of 

 fuci, and stones ; often associated with B. porcatus and crenatus. 



I have seen, in Mr. Wood's collection, from the Red Crag, fine and perfectly preserved 

 specimens of a rostrum, and of a lateral compartment. The latter was three inches in height, 

 and, including the alse, one inch in width. I have also seen a specimen said doubtfully to 

 have come from the glacial beds of Scotland. As it is so very common in the deposits of 

 this same age in other countries, no doubt it will hereafter be found more plentifully in 

 Scotland, and probably in the mammaliferous Crag of England. Balanus Hameri is a 

 very fine species ; I have seen a recent specimen from the coast of Yorkshire, two inches 

 in diameter, and one inch and three-quarters in height : another specimen was three inches 

 in height. The specimens in the glacial deposits, seem to have acquired larger dimen- 

 sions : a compartment from Uddevalla being nearly four inches in height. The white 

 colour, smooth surface, and regularly arched radii, give to the shell a very elegant appear- 

 ance, which has appropriately been compared to that of a white tulip. The diagnosis of 

 this species is easy ; the walls as well as the basis being solid or not porose, serve to dis- 

 tinguish it from all other forms except certain varieties of Bal. unguiformis, and by several 

 minor characters," such as the finely striated and more elongated scuta, &c, Bal. Hameri, 

 can be discriminated from B. unguiformis. 



1 Sir C. Lyell remarks that this is apparently the B. Uddeoallensis, (Linn.), of Swedish lists of fossils. 

 Prof. E. Forbes has shown ('Mem. Geolog. Survey of England,' vol. i, p. 364) how this name arose, from 

 a short description, prior to the introduction of the binomial system, " Lepas quae Balanus Uddevallensis," 

 given by Linnaeus in his Wast-Gotha Resa, in 1747. 



For the reference to Ascanius' work, which is on the binomial system, and subsequent to the 10th 

 edit, of Linnaeus in 1 758, I am greatly indebted to Mr. Sylvanus Hanley. Had it not been for this 

 gentleman, I should have used Muller's name of B. tulipa as the first name. 



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