496 CAMBEIAN BRACHIOPODA. 



The specific name is given in honor of Dr. R. W. Ells, whose fine work on the geology of a 

 portion of the Province of Quebec unraveled the stratigraphic relations of the Lauzon slates in 

 which the species occurs. Doctor EUs guided me to the locaHty at which the species occurs. 



Formation and locality. — Ordovician: (220a) Shales of the "Upper Sillery" ('Lauzon of Logan), onChaudiere 

 River at the Grand Trunk raihoad bridge, Province of Quebec, Canada. 



^ LiNGXJLELLA FEREUGINEA Salter. 



Plate XXIX, figures 1, la-w, 2, 2a;-f ; Plate XXX, figure 1; Plate XXXI, figures 3, 3a-c; Plate XXXV, figures 4, 4a-b. 



Lingulella unguiculus Saltek, 1866, Kept. British Assoc. Adv. Sci. for 1865, p. 285. (Mentioned in a list of fossils 

 from the "Menevian group.") 



Lingulella ferruginea Salter, 1867, Quart. Jour. Geol. Soc. London, vol. 23, pt. 1, p. 340, fig. 1. (Described by Salter 

 as a new species in the paper by Salter and Hicks, see p. 497 for copy. Fig. 1 is reproduced in this monograph, 

 PI. XXIX, fig. 2b.) 



Lingulella ferruginea ovalis Hicks, 1867, idem, p. 341, figs. 2 and 3, p. 340. (Characterized by Hicks as a new 

 variety, and discussed by Salter and Hicks, in the paper by Salter and Hicks. Figs. 2 and 3 are reproduced 

 in this monograph, PL XXIX, figs. 2 and 2a, respectively.) 



Lingulella ferruginea Salter, Davidson, 1868, Geol. Mag., vol. 5, pp. 306-307, PI. XV, figs. 1-8. (Described and dis- 

 cussed. Figs. 7a and 6a are reproduced in this monograph, PL XXIX, figs. 2c and 2d, respectively.) 



Lmgulella ferruginea ovalis Hicks, Davidson, 1868, idem, p. 307. (Mentioned in discussion of L. ferruginea.) 



Lingulella ferruginea Salter, Davidson, 1871, British Fossil Brachiopoda, vol. 3, pt. 7, No. 4, pp. 336-337, PI. XLIX, 

 figs. 32-35. (Described and discussed, see p. 497 for copy of part of discussion. Figs. 35a and 33a are repro- 

 duced in this monograph, PI. XXIX, figs. 2e and 2f, respectively.) 



Lingula or Lingulella sp. Linnarsson, 1876, Bihang till K. svensk. Vet.-Akad. Handl., Bd. 3, No. 12, pp. 15-16, 

 PI. Ill, figs. 24-28. (Described and discussed in English. Fig. 28 is reproduced in this monograph, PI. XXXI, 

 fig. 3c.) 



Lingulella sp. undt. Linnarsson, 1879, Sveriges Geol. Undersokning, Afhandl. och uppsatser, Ser. C, No. 35, p. 25, 

 PI. Ill, figs. 38 and 39. (Described in Swedish.) 



Lingulella ferruginea Salter, Salter and Etheridge, 1881, Mem. Geol. Survey Great Britain, vol. 3, 2d ed., p. 538. 

 (Occurrence mentioned.) 



Lingulella ferruginea Salter, Davidson, 1883, British Fossil Brachiopoda, vol. 5, pt. 2, PI. XVII, fig. 35. (No text 

 reference.) 



Lingula ? dawsoni Matthew, 1884, Manuscript name requested by Walcott. 



Lingula ? dawsoni Matthew, Walcott, 1884, Bull. U. S. Geol. Survey No. 10, p.. 15, PI. V, fig. 8. (Described and dis- 

 cussed as a new species, see p. 497 for copy. The specimen represented by fig. 8 is redrawn in this monograph, 

 PI. XXIX, fig. Id.) 



Lingulella dawsoni Matthew (in part), 1886, Trans. Roy. Soc. Canada for 1885, vol. 3, sec. 4, No. 3; pp. 33-34, PI. V, 

 fig. 9d (not figs. 9, 9a-c). (Described and discussed as a new species, but refers in synonymy to preceding 

 reference. The specimen represented by fig. 9d is redrawn in this monograph, PI. XXIX, fig. 1. The speci- 

 mens represented by figs. 9, 9a-c are referred in this monograph to Lingulella martinensis.) 



Lingulella linguloides Matthew, 1886, idem, p. 34, PL V, figs. 8, 8a-b. (Described and discussed as a new species. 

 The two specimens represented by figs. 8, 8a-b are redrawn in this monograph, PL XXIX, figs la, lb, and Ic, 

 respectively.) 



Obolella f gemmula Matthew, 1892, Trans. Roy. Soc. Canada for 1891, vol. 9, sec. 4, No. 5, pp. 41-42, PL XII, figs. 

 8a-c. (Described and discussed as a new species. The specimens represented by figs. 8b and 8c are redrawn 

 in this monograph, PL XXIX, figs, lu and Iv, respectively.) 



Lingulella dawsoni (Matthew), Hall and Clarke, 1892, Nat. Hist. New York, Paleontology, vol. 8, pt. 1, p. 58, PL II, 

 fig. 5. (Mentioned in text. Fig. 5 is drawn from the specimen figured by Matthew, 1886, PL V, fig. 9d.) 



Lingulella ci. ferruginea Salter, Kayser, 1897, Zeitschr. Deutsch. geol. GeselL, Bd. 49, Heft 2, No. 2, p. 280, PL VII, 

 fig. 7. (Characterized and discussed in German. Fig. 7 is reproduced in this monograph, PL XXX, fig. 1.) 



Obolus {Lingulella) gemmulus (Matthew), Walcott, 1901, Proc. U. S. Nat. Mus., vol. 23, p. 673. (Merely changes 

 generic reference.) 



Leptobolus cf. linguloides Matthew, 1902, Bull. Nat. Hist. Soc. New Brunswick, vol. 4, pt. 5, No. 20, p. 407. (De- 

 scribed.) 



Leptobolus linguloides Matthew, 1902, idem, p. 407. (Merely changes generic reference.) 



Lingulella ferruginea Salter, Matthew, 1903, Geol. Survey Canada, Rept. Cambrian Rocks Cape Breton, p. 108. (Dis- 

 cussed in description of "Leptobolus atavus.") 



Leptobolus gemmulus Matthew, 1903, idem, pp. 190-192, PL XIV, figs. la-c. (Original description, Matthew 1892, 

 p. 41, copied, revised, added to, and discussed.) 



Leptobolus cf. linguloides Matthew, 1903, idem, pp. 192-193. (Copy of Matthew, 1902b, p. 407.) 



Leptobolus linguloides Matthew, idem, p. 193. (Merely changes generic reference.) 



