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Published online by Cambridge University Press: 01 May 2009
The genus Piloceras was founded by J. W. Salter in 1859 upon the siphuncle of a shell closely allied to Endoceras. It was supposed by Salter that the invaginated sheaths observed in the siphuncle of Piloceras “represented the siphuncle and septa combined,” the septate part of the shell not being preserved in the specimens described by him.
page 541 note 2 Quart. Journ. Geol. Soc. vol. xv. p. 376.Google Scholar
page 541 note 3 Canadian Naturalist and Geologist, vol. v. p. 171.Google Scholar
page 541 note 4 Canadian Naturalist, new ser. vol. x. No. 1.Google Scholar
page 541 note 5 Bull. Amer. Mus. Nat. Hist. vol. i. No. 8, p. 323, pl. xxviii. New York, 1886.Google Scholar
page 541 note 6 Syst. Sil. de la Bohême, vol. ii. Texte, v. 1877, p. 905.Google Scholar
page 541 note 7 British Foss. Cephalopoda, pt. i. p. 186.Google Scholar
page 543 note 1 This form of chalcedony used to be called beekite, but it differs so slightly in composition from ordinary chalcedony that that name is no longer employed for it by mineralogists.
page 543 note 2 Proc. Boston Soc. Nat. Hist. vol. xxii. 04 4, 1883, p. 261.Google Scholar
page 545 note 1 These are beautifully preserved in many examples of Actinoceras in the British Museum (Nat. Hist.).
page 545 note 2 Palæontology, 2nd ed. 1861, p. 102.Google Scholar See also Saemann, L., Ueber die Nautiliden, Palæontographica, Band iii. 1845, p. 121, Tab. xviii.Google Scholar
page 545 note 3 Called “funnels” by Prof. Hyatt. “Siphonalduten” of the Germans; “goulots” of the French.
page 545 note 4 Hyatt in his definition of Piloceras (loc. cit. p. 266) states that it is “often annulated,” but this is evidently an inadvertence, because the outer shell was unknown when he wrote, and remained so until the specimens described by Prof. Whitneld saw the light, and these showed only “a few transverse wrinkles of growth.” He probably had in his mind the detached siphuncles, which have an annulated appearance caused by the adherent remains of the septa.Google Scholar
page 546 note 1 Canadian Naturalist, 1859, vol. iv. p. 361.Google Scholar
page 546 note 2 Presidential Address before the Royal Physical Society of Edinburgh, Nov. 1885.