On the Microscopic Forms, (&c. 103 



TelUna jmsilla (jyars.) Dillw. 2, 106, 1819. 



Ci/das Virginica Fer. Mag. Zool. 1835.— Bgt. Amen, 1, p. 10, 1853. 

 « duhia Say. Nichol. Ency. 1816, 1818, 3d edit. p. 4, pi. I. f. 

 10, 1829.— Rafin. An. gen. scie. phy. 319, 1820.— Fer. Mag. 

 Zool. 1835.— Gould Kept. 75, f. 56, 1841.— De Kay 223, pi. 

 XXV. f. 261, 1842.— Linsl. Amer. Jl. 48, p. 276, 1845.— C. 

 B. Ads. Cat. 29, 1847.— Jay Cat. 4 edit. 32, 1850.— Bgt. 

 Amen. 1. p. 53, 1853. 

 " dubiosa Say. Jay Cat. 3 edit. 16, 1839.— Catlow & Reeve, 



29, 1845. — Bgt. Amen. 1, p. 53, 1853. 

 " [Physemoda) ceqtialis Rafin. Ann. gen. scie. Phy. V. 319, 1820. 

 Pisidium abruptum Hald. Ac. n. s. Phil. Proc. 1, 53, 1841. — De 

 Kay 225, 1842.— Bgt. Amen. 1, p. 53, 1853. 

 « dubium Hald. Ac. n. s. Phil. Proc. 1, 103, 1841. 

 " « Say Gould Ag. L. Sup. 245, 1848. 



« « Gould Pr. Post. Proc. IV. 165, 1851.— Stimp. 



N. E. Moll. 16, 1851.— Pr. Best. Jl. VI. 354, pi. XI. f. 4-6, 

 1852.— Hartm. Cat. 1853.— Lewis Bost. Proc. VI. 2, 1856. 

 " cequale Rafin. Pr. Bost. Jl. VI. 367, 1852. 

 Eab. 'E. Amer. 



— vitretwi Pf. Verany Cat. 13, 1846, is P. casertanum Bgt. 



— zonatum Pr. Bost, Proc. IV. 162, 1851, is P. abditum Hald. 



Xin. — On the Microscopic Forms of the Harhor of Charles- 

 ton, South Carolina. 



By Arthur M. Edwards. 

 Eead February 21, 1859. 



In the year 1850, Professor Bailej published, in the Smith- 

 sonian Contributions to Knowledge, a list of the microscopic 

 organisms which he had found in mud collected from the logs 

 of wharves, and other situations in the harbor of Charleston, 

 S. C, comprising two new species, besides many other curious 

 forms, and in the year 1853 he described four species of Ehren- 



APEIL, 1860. 8 ^^^' ^^°" ■^^^' ^^'^' ^°'' ^^^* 



