BRACHIOPODA. 219 



Genera (1) C AM A R E L L A, Billings, 1859; (2) P A R A ST ROP H I A, 

 GEN. NOV.; (3) ANASTROPHIA, Hall, 1867. 



PLATES LXII, LXIII. 



(3) 1S39. Ttrthraiula, J. de C. Sowkkby. Murchison's Silurian System, pis. xii, xiii. 



(2) 1847. AtrijiM, Hall. Palseontology of N. Y., vol. i, p. 144, pi. xxxiii, fig. 10. 



(8) 1848. Terebratula, Davidson. Bull. Soc. Geol. de Fi-ance, second seiies, vol. v, p. 328. 



(3) 1848. Bypofliijris, Saltkr. Mem. Geol. Survey Great Britain, vol. ii, p. 28J. 

 (3) 1852. Atrypa, Hall. Palseontolog-y of New York, vol. ii, p. 275, pi. Ivii, fig. 2. 



(1) 1856. Atrypa, BillIxNgs. Canadian Naturalist and Geologist, vol. i, p. 208, figs. 20-23. 



(2) 1857. Pe7itamerii.s, Bihuyos. Geological Survey of Canada; Rept. of Pi-ogie.ss for 185G ; p. 295 



(3) 1857. Pentamerus, Hall. Tenth Rept. N. Y. State Cab. Nat. Hi.»t., p. 104, figs. 1, 2. 

 (3) lSr.9. Pt.ntamtriis, Hall. Twelfth Rept. N. Y. State Cat). Nat. Hist., p. 77. 



(3) 1859. Pentamerm, Hall. Paleontology of New York. vol. iii, p. 260, pi. xlviii, fig. 1. 



(3) 1859. Mliynchonella, Salter. Murchison's Silui-ia, ]>. 544, pi. xxii, fig. 10. 



(1) 1859. Camarella, Billings. Canadian Naturalist and Geologist, vol. iv, pii. 301, 302, 445, tigs. 23, 24. 



(3) 1860. Rhynchonella, Lindstrom. Gotland's Brachiopoden, p. 366. 



(1) 1861. CamareWo'., Billings. Geology of Vermont, vol. ii, p. 949, fig. 353. 



(1) 1861. Camarella, Billings. Palaeozoic Fossils, vol. i, p. 10, fig. 13. 



(2) 1862. Camarella, Billings. Palseozoic Fossils, vol. i, j). 148, figs. 128, a, b. 



(1) 1863. Camarella, Billings. Geology of Canada, p. Iii7, figs. 52, 53; p. 143, figs. 77, 78; p. 168, 

 fig. 154 ; p. 284, fig. 290. 



(3) 1863. Pentama-us, Billings. Geology of Canada, p. 957, fig. 453. 



(3) 1865. BracliymeriLH, Siialer. Bull. Mus. Comparative Zoology, No. 4, \t. 69. 



(1) 1865. Camarella, Billings. Paleozoic Fossils, vol. i, pp. 219, 304, fig. 295; p. 305, fig. 297. 



(1) 1866. Camarella, Billings. Catalogue Silurian Fossils of Anlicosti, p. 45. 



(3) 1867. Aii.antroplila, Hall. Twentieth Rept. N. Y. State Cab. Nat. Hist., p. 163. 



(3) 1867. Anastivphia, Hall. Paleontology of N. Y., vol. iv, p. 374. 



(3) 1869. Rliynchunella, Davidson. British Silurian Bi'achiopoda, p. 178, id. xxii, figs. 24-27. 



(3) 1879. Aiiastrophia, Hall. Twenty-eighth Rept. N. Y. State Mus. Nat. Hist., p. 16S, pi. xxvi, 



figs. 41-49. 



(3) 1882. Avastropliia, Hall. Eleventh Rejit. State Geologist of Indiana, p. 311, pi. xxvi, figs. 41-49. 



(2) 1883. Rhy7icho7iella, Davidson. British Silurian Brachiopoda, Suppl.,p. 201, pi. xi, figs. 26a-rf. 

 (1) 1883. Stricklandhiia ?, Davidson. British Silurian Brachiopoda, Suppl., p. 166, pi. ix, figs. 27-29. 

 (1) 1886. Camarella. Walcott. Bull. U. S. Geol. Survey, No. 30, p. 122, pi. vii, fig. 8. 



(1) 1889. CamarellaffVfALCOTr. Pi'oc. U. S. National Museum, vol. xii, p. 36. 



(3) 1889. Anastropliia, Bekcher and Clarke. Memoirs N. Y. State Museum, p. 32, pi. iii, figs. 14-16. 

 (3) 1889. Anatitruphia, Nettelroth. Kentucky Fossil Shells, p. 47, pi. xxxii, figs. 17-20. 



(1) 1890. Camarellaf, Walcott. Tenth Ann. Rept. Director U. S. Geological Survey, p. 614, pi. ixxii, 

 figs. ia-d. 



CAMARELLA, Billings. 1859. 



PLATE LXII. 



The name Camarella was originally applied to subtrihedral biconvex shells 

 with low median fold and sinus ; having, in effect, a rhynchonelloid exterior. 

 The first species of the genus cited by its author, and that which will be taken 

 as representing the typical structure of the group, is Camarella Volboithi, BiWmgs, 



