134 TRILOBITES OF GIRVAN. 



1781. Trihbus tuberculatus, Briiimich, Dausk. Vid. Selsk. Skrifter; Nye Sanding, vol. i, p. 389. 



1810. Trilobites tuberculatus, Blumenbach, Abbild. Naturk. Gegenst., pt. i, fig. 50. 



1811. Entomolithus paradoxus, Parkinson, Organic Remains, vol. iii, p. 263*, pi. xvii, figs. 11, 13, 14. 

 1818. Entomostracites tuberculatus, Wahlenberg (e. p.), Petrif. Suec, p. 31. 



1821. Entomolithes tuberculatus, Wahlenberg, Nov. Act. Upsala, vol. viii, pp. 6, 31. 



1822. Calymene blumenbachi, Brongniart, Hist. Nat. Crust. Foss., p. 11, pi. i, figs, la— c. 

 1826. Calymene tuberculata, Dalinan, Palsead., p. 227, pi. i, figs. 3 a — c. 



P 1837. Calymene blumenbachi, Hisiuger, Leih. Suec, p. 10, pi. i, figs. 4a, b. 



1839. Calymene blumenbachii, Murchison, Silur. Syst., p. 653, pi. vii. figs. 6, 7 (non fig. 5). 

 1843. Calymene blumenbachi, Burnieister (e. p.), Organ. Trilob., p. 96, pi. ii, figs. 1—3. 

 1854. Calymene blumenbachi, M'Coy (e. p.), Synops. Pal. Foss. Woodw. Mus., p. 165. 



Calymene subdiademata, M'Coy (e p.), ibid., p. 166, pi. i r, figs. 9, 9 a (non figs. 10, 10 a). 

 — Calymene tuberculata, Augelin (e. p.), Pal. Scand., p. 29, pi. xix. fig. 5 a (non cet.). 

 ? 1857. Calymene blumenbachi, Nieszkowski, Aivhiv Naturk Liv.-Est.-Kurl., ser. i, vol. i, p. 541. 

 1865. Calymene blumenbachii, Salter, Mon. Brit. Trilob., p. 93, pi. viii, figs. 7 — 16 ; pi. ix, figs. 1, 2. 

 1873. Calymene blumenbachii, Salter (e. p.), Cat. Camb. Silur. Foss. Woodw. Mus., pp. 77, 132. 

 1875. Calymene blumenbachii, Baily, Char. Brit. Foss., p. 67, pi. xxiii, figs. 1 a, b. 

 1S77. Calymene blumenbachi, Woodward (e. p.), Cat. Brit. Fuss, ("rust., p. 28. 

 1879. Calymene blumenbachii, Nicholson and Etheridge (e. p.), Mon. Silur. Foss. Grirvan, fasc. ii, 



p. 140, pi. x, fig. 6 (non figs. 2 — 5). 

 1885. Calymene tuberculata, Lindstrom, Forteckn. Gotl. Silur. Crust., p. 63, pi. xvi, fig. 9. 

 ? 1890. Calymene tuberculata, Pompecki, Trilobitf. Ost. u. West-pieuss. Diluv. Geschieb. (Beitr. 



Naturk. Preuss. Phys. Oe!c. Gesell. Konigsberg), p. 40, pi. vi, fig. 19. 

 ? 1894. Calymmene tuberculata, Schmidt, Rev. 0«tb;ilt. Silur. Trilob., pt. iv, p. 13, pi. i, figs. 1 — 7. 

 1899. Calymene blumenbachi, Mem. Geol. Surv., Silur. Rucks Brit., vol. i, Scotland, pp. 529, 530, 

 536, 540, 543, 550 (non p. 524). 



Remarks. — It lias been possible with the aid of the abundant material from Girvan 

 and in the light of the suggestions put forward by Pompecki 1 to separate several 

 distinct species from those grouped together by Nicholson and Etheridge as C. 

 blumenbachi. The typical C. blumenbachi, however, does occur in the Girvan area, 

 though apparently it is limited to the Silurian. One example from Mulloch was 

 figured by Nicholson and Etheridge (op. cit. pi. x, fig. 6). The distinctive features 

 of the Ordovician species hitherto associated with C. blumenbachi are given below. 

 The large overhanging and more or less swollen frontal lobe of the glabella and 

 the reduced size of the first lateral lobes are marked characteristics of the Silurian 

 form. 



A possible variety with a somewhat angulated anterior margin and a longer and 

 narrower glabella occurs in Mrs. Gray's collection from Newlands (PI. XVII, fig. 13). 



Collection*. — Mrs. Gray (f. M.) ; Museum of Practical Geology ; Edinburgh 

 Museum ; Woodwardian [Sedgwick] Museum. 



Horizons and Localities. — Mulloch Hill Group (L. Llandovery) : Mulloch Hill. 

 Saugh Hill Group (M. Llandovery) : Newlands; Woodland Point; Craigens. 

 lVnkill Group (Tarannon) : Penkill. 



1 Pompecki, ' Neues Jahrb. fur Miner.,' 1898, vol. i, p. li'7. 



