BRACHIOPODA. 219 



Genera (1) C AMARELL A, Billings, 1859; (2) P A R A ST ROPH I A, 

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



PLATES LXII, LXUI. 



(3) 1839. Tertbratula, J. db C. Sowkkby. Murchison'a Silurian System, pis. xii, xiii. 



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



(3) 1848. Terebratula, Davidson. Bull. See. Geol. de France, second series, vol. v, p. 328. 

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



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



(1) 185(5. Ati-ypa, Billi.ngs. Canadian Naturalist and Geologist, vol. i, p. 208, figs. 20-23. 



(2) 1857. Pevtamerus, Billisgs. Geological Sui-vey of Canada ; Rept. of Progress for 1856 ; p. 295 



(3) 1857. Pentatnerus, Hall. Tenth Rept. N. Y. State Cab. Nat. Hist., p. 104, figs. 1, 2. 

 (3) 18.'9. Pentamenis, Hall. Twelftli Rept. N. Y. State Cab. Nat. Hist., p. 77. 



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



(3) 1859. Rhynchonella, Saltbr. Mui'chison's Siluria, p. 544, pi. xxii, fig. 10. 



(1) 1859. Camartlla, Billings. Canadian Natui-alist and Geologist, vol. iv, pp. 301, 302, 445, figs. 23, 24. 



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



(1) 1861. Ca»nareZ/a, Billings. Geology of Vermont, vol. ii, p. 949, fig. 353. 



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



(2) 1862. Camarella, Billings. Palaeozoic Fossils, vol. i, p. 148, figs. 128, o, 6. 



(1) 1863. Camarella, Billings. Geology of Canada, p. 121, figs. 52, 53; p. 143, figs. 77, 78; p. J68, 

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



(3) 1863. Pentamerus, Billings. Geology of Canada, p. 957, fig. 453. 



(3) 1865. Brachymerus, Shalbb. Bull. Mus. Comparative Zoology, No. 4, p. 69. 



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



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



(3) 1867. Ana-ttrophia, Hall. Twentieth Rept. N. Y. State Cab. Nat. Hist., p. 163. 



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



(3) 1869. Rhynchonella, Davidson. British Silurian Brachiopoda, p. 178, pi. xxii, figs. 24-27. 



(3) 1879. Anastrophia, Hall. Twenty-eighth Rept. N. Y. State Mus. Nat. Hist., p. 168, pi. xxvi, 



figs. 41-49. 



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



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

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

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



(1) 1889. CawareWa?, Walcott. Proc. U. S. National Museum, vol. xii, p. 36. 



(3) 1889. Anastrophia, Bbkchbb and Clarke. Memoii-s N. Y. State Museum, p. 32, pi. iii, figs. 14-16. 

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



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

 figs. 4a-d. 



CAMARELLA, Billings. 1859. 



PLATE LXn. 



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 Volborthi, Billings, 



