BRACHIOPODA. 
219 
Genera (1) CAMARELLA, Billings, 1859; (2)PARASTR0PHIA, 
GEN. NOV.; (3) ANASTROPHIA, Hall, 1867. 
(3) 
1839. 
(2) 
1847. 
(3) 
1848. 
(3) 
1848. 
(3) 
1852. 
(1) 
1856. 
(2) 
1857. 
(3) 
1857. 
(3) 
1859. 
(3) 
1859. 
(3) 
1859. 
(1) 
1859. 
(3) 
1860. 
(1) 
1861. 
(1) 
1861. 
(2) 
1862. 
(1) 
1863. 
(3) 
1863. 
(3) 
1865. 
(1) 
1865. 
(1) 
1866. 
(3) 
1867. 
(3) 
1867. 
(3) 
1869. 
(3) 
1879. 
(3) 
1882. 
(2) 
1883. 
(1) 
1883. 
(1) 
1886. 
(1) 
1889. 
(3) 
1889. 
(3) 
1889. 
(1) 
1890. 
PLATES LXII, LXIII. 
Tertbmtula, J. de C. Sowkeby. Murchison’s Silui'ian System, pis. xii, xiii. 
Atrypa, Hall. Palseontology of N. Y., vol. i, p. 144, pi. xxxiii, fig. 10. 
2’erehratida, Davidson. Bull. Soc. Geol. de Fi-ance, second series, vol. v, p. 328. 
Hypothyris, Salter. Mem. Geol. Survey Great Britain, vol. ii, p. 280. 
Atrypa, Hall. Palseontology of New York, vol. ii, p. 275, pi. Ivii, fig. 2. 
Atrypa, Billings. Canadian Naturalist and Geologist, vol. i, p. 208, tigs. 20-23. 
Pentamerus, Billings. Geological Survey of Canada; Rejit. of Pi'Ogiess for 1856 ; p. 295 
Pentamerus, Hall. Tenth Kept. N. Y. State Cab. Nat. Hist., p. 104, figs. 1, 2. 
Pentamerus, Hall. Twelfth Kept. N. Y. State Cab. Nat. Hist., p. 77. 
Pentamerus, Hall. Palseontology of New York, vol. iii, ji. 260, pi. xlviii, fig. 1. 
Rhynchonella, Salter. Murchison’s Siluria, p. 544, pi. xxii, fig. 10. 
Camarella, Billings. Canadian Natui-alist and Geologist, vol. iv, pp. 301, 302, 445, figs. 23, 24. 
Rhynchonella, Lindsteom. Gotland’s Brachiopoden, p. 366. 
Camarella; Billings. Geology of Vermont, vol. ii, ji. 949, fig. 353. 
Camarella, Billings. Palieozoic Fossils, vol. i, p. 10, fig. 13. 
Camarella, Billings. Palaeozoic Fossils, vol. i, p. 148, figs. 128, a, h. 
Camarella, Billings. Geology of Canada, p. 127, figs. 52, 53; p. 143, figs. 77, 78 ; p. 168, 
fig. 154; p. 284, fig. 290. 
Pentamerus, Billings. Geology of Canada, p. 957, fig. 453. 
Brachymerus, Shalee. Bull. Mus. Comparative Zoology, No. 4, p. 69. 
Camarella, Billings. Palaeozoic Fossils, vol. i, pp. 219, 304, fig. 295 ; p. 305, fig. 297. 
Camarella, Billings. Catalogue Silurian Fossils of Anticosti, p. 45. 
Anastrophia, Hall. Twentieth Kept. N. Y. State Cab. Nat. Hist., p. 163. 
Anastrophia, Hall. Palaeontology of N. Y., vol. iv, p. 374. 
Rhynchonella, Davidson. British Silurian Brachiopoda, p. 178, pi. xxii, figs. 24-27. 
Anastrophia, Hall. Twenty-eighth Kept. N. Y. State Mus. Nat. Hist., p. 168, pi. xxvi, 
figs. 41-49. 
Anastrophia, Hall. Eleventh Kept. State Geologist of Indiana, p. 311, pi. xxvi, figs. 41-49. 
Rhynchonella, Davidson. British Silui-ian Brachiopoda, Suppl.,p. 201, pi. xi, figs. 26a-d. 
/Stricklandinia 9, Davidson. British Silurian Brachiopoda, Suppl., p. 166, pi. ix, figs. 27-29. 
Camarella, Walcott. Bull. U. S. Geol. Survey, No. 30, p. 122, pi. vii, fig. 8. 
Camarellaf, Walcott. Proc. U. S. National Museum, vol. xii, p. 36. 
Anastrophia, Beecher and Clarke. Memoii-s N. Y. State Museum, p. 32, pi. iii, figs. 14-16. 
Anastrophia, Nbttelroth. Kentucky Fossil Shells, p. 47, pi. xxxii, figs. 17-20. 
Camarella?, Walcott. Tenth Ann. Kept. Director U. S. Geological Survey, p. 614, pi. Ixxii, 
figs. 4a-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 Volborthi, Billings, 
