402 SYSTEMATIC PALEONTOLOGY 



MOLLUSCOIDEA. 



Class BRACHIOPODA. 



Order NEOTREMATA. 



Superfamily DISCINACEA. 

 Family DISCINID/E. 



Genus DISCINISCA Dall. 



DisciNiscA LUGUBRis (Conrad). 



Plate CIX, Figs, la, lb, 2a, 2b, 3. 



Capulus luguhris Conrad, 1834, Jour. Acad. Nat. Sci. Phila., vol. vii, 1st ser., p. 143. 

 Orbicula luguhris Hodge, 1841, Amer. Jour. Sci., vol. xli, p. 344. 

 Orbicula luguhris Conrad, 1842, Proc. Nat. Inst., Bull, ii, pp. 183, 183, 185. 

 Orbicula lugubris Conrad, 1845, Fossils of tLe Medial Tertiary, No. 3, p. 75, pi. 



xliii, fig. 2. 

 Orbicula lugubris var. A Conrad, 1845, Fossils of the Medial Tertiary, No. 3, p. 75. 

 Orbicula muUilineata Conrad, 1845, Fossils of the Medial Tertiary, No. 3, p. 75, 



pi. xliii, fig. 3. 

 Capulus lugubris H. C. Lea, 1845, Trans. Amer. Philos. Soc, vol. ix, p. 230. 

 Orbicula lugubris Tuomey and Holmes, 1857, Pleiocene Fossils of South Carolina, 



p. 17, pi. V, fig. 1. 

 Orbicula multiliueata Tuomey and Holmes, 1857, Pleiocene Fossils of South Caro- 

 lina, p. 18, pi. V, fig. 2. 

 Orbicula lugubris Emmons, 1858, Rept. N. Car. Geol. Survey, p. 274, fig. 187. 

 Orbicula lugubris Conrad, 1862, Proc. Acad. Nat. Sci. Phila., vol. xiv, p. 582. 

 Orbicula muUilineata Conrad, 1862, Proc. Acad. Nat. Sci. Phila., vol. xiv, p. 582. 

 Discina lugubris Meek, 1864, Miocene Check List, Smith. Misc. Coll. (183), p. 3. 

 Discina vuiltilineata Meek, 1864, Miocene Check List, Smith. Misc. Coll. (183), p. 3. 

 Biscina luguhris Harris, 1893, Amer. Jour. Sci., ser. iii, vol. xiv, p. 21. 

 Discina ^^ acetabula'''' [misprint for lugubris] Harris, 1893, Amer. Jour. Sci., ser. iii, 



vol. xiv, p. 25. 

 Discina luguhris Whitfield, 1894, Mon. xxiv, U. S. Geol. Survey, p. 23, pi. i, figs. 



1-3. 

 Discinisca lugubris Schuchert, 1897, Bull. 87, U. S. Geol. Survey, p. 219. 

 Discinisca muUilineata Schuchert, 1897, Bull. 87, U. S. Geol. Survey, p. 219. 

 Discinisca luguhris Dall, 1898, Trans. Wagner Free Inst. Sci., vol. v, p. 9, pi. i, 



tig. 2, A, B. 

 Discinisca lugubris Dall, 1903, Trans. Wagner Free Inst. Sci., vol. iii, pt. vi, p. 1534, 



pi. Ixiii, fig. 13. 



Description. — "Shell irregular, suboval, depressed, laminated; with 

 ladiating crenulating striae; apex slightly prominent; nearly terminal. 

 Lenffth, half an inch." Conrad, 183-i. 



