BRACHIOPODA. 
249 
ment of the internal septa and spondylium is the same as in Pentamerus oblongus, 
except that the supporting septa of the brachial valve are higher and more 
nearly vertical. 
Type, Capellinia mira, sp. nov. Niagara dolomites of Wisconsin. 
Observations. This remarkable shell is virtually a Pentamerus oblongus in 
which the relative convexity of the valves is reversed and this reversion car¬ 
ried to a great extreme. The single species observed, which has not before 
been described, has been studied from a number of examples obtained from the 
dolomites of Niagara age, in the vicinity of Milwaukee, Wisconsin, and loaned 
for study and use in the preparation of this volume by T. A. Greene, Esq., of 
that city. It has not been observed elsewhere. Those reversed shells have 
afforded no evidence that a normal relation of the valves existed in early 
growth-stages, and in this respect they differ from the reversed shells of the 
genus Anastrophia. 
Genus STRICKLANDINIA, Billings. (1863) 1859. 
PLATE LXXIII. 
1839. Spirifer Atrypa, J. db C. Sowbrby. Silurian System, pi. xxi, figs. 3, 21; pi. xxii, fig. 6. 
1846. Spirifer, McCoy. Silurian Fossils of Ireland, p. 37, pi. iii, fig. 24. 
1848. Spirifer, de Vernbuil. Bull. Soc. Geol. France, second ser., vol. v, p. 347. 
1852. Spirifer, Hall. Palaeontology of N. Y., vol. ii, p. 66, pi. xxii, fig. 3. 
1859. Pentamfnos, Salter. Murchison's Siluria, second ed., pp. 100, 230, figs. 1, 3. 
1859. Stricklandia, Billings. Canadian Naturalist and Geologist, vol. iv, p. 132-135. 
1861. StricMandia, Billi.ngs. Canadian Journal, vol. vi, p. 265. 
1862. Stricklandia, Billings. Palaeozoic Fossils, vol. i, p. 84. 
1863. Stricklandia, Billings. Proc. Portland Soc. Nat. Hist., vol. i, p. 114. 
1863. Stricklandinia, Billings. Canadian Naturalist and Geologist, vol. viii, p. 370. 
1866. Stricklandinia, Billings. Catalogue Silurian Fossils of Anticosti, p. 45. 
1867. Stricklandinia, Hall. Twentieth Ann. Kept. N. Y. State Cab. Nat. Hist., p. 160. 
1867. Stricklandinia, Hall. Palaeontology of N. Y., vol. iv, p. 369. 
1867. Stricklandinia, Davidson. Bidtish Silurian Brachiopoda, pp. 157-163, jd. xix, figs. 13-23; pi. xx, 
figs. 1-13. 
1868. Stricklandinia, Billings. Geological Magazine, vol. v, p. 59, pi. iv. 
1870. Stricklandinia, Meek and Worthbn. Proc. Acad. Nat. Sci. Philadel]ihia, vol. xiv, second ser., 
p. 37. 
1874. Stricklandinia, Billings. Palaeozoic Fossils, vol. ii, pp. 78, 81, 83, fig. 49; pp. 84-89, pi. vi, 
figs. 1, 2 ; pi. vii, figs. 1, 4. 
1875. Stricklandinia, Meek and Worthen. Geol. Survey of Illinois, vol. vi, p. 502, pi. xxiv, fig. 5. 
1876. Stricklandinia, White. Proc. Acad. Nat. Sci. Philadelphia, vol. vi, third ser., p. 30. 
1877. Stricklandinia, Whitfield. Annual Kept. Geol. Survey of Wisconsin, p. 81. 
1880. Stricklandinia, Dawson. Canadian Naturalist and Geologist, vol. ix, second ser., p. 341. 
