136 Contributions to Indian Malacology. [No. 2, 
Gleanings in Science, Vol. L., Caleutta, 1829. 
Kiister, Mart. and Chem.—Systematisches Conchylien Cabinet von 
Martini und Chemnitz, 2nd edition, by Dr. H. C. Kiister and others. 
Vol. [X. Part 2, commencing in 1843 : unfinished. 
Ann. and Mag. Nat. Hist—The Annals and Magazine of Natural 
History, London, 3rd series, Vol. X. 1862. 
Trans. Am. Phil. Soc.—Tyransactions of the American Philosophi- 
cal Society held at Philadelphia, new series, Vol. IV. 1834; Vol. V. 
1837 ; Vol. VI. 1839; Vol. VIII. 1843. 
Jour. Acad. Nat. Sci. Phil.—-Journal of the Academy of Natural 
Sciences of Philadelphia, Vol. [V. 1858-60; Vol. V. 1862-63. 
J. A. S. B.—Journal of the Asiatic Society of Bengal, Vol. III. 
1834; Vol. IV. 1835; Vol. V. 1836. 
Proc. Bost. Soc. Nat. Hist.—Proceedings of the Boston Society of 
Natural History, Vol. I. 1848-44, (not accessible in Calcutta). 
Gould, Ot. Conch—Augustus A. Gould, Otia Conchologica, de- 
scriptions of shells and mollusks from 1839 to 1862, Boston, 1862. 
S. Hanley, Supp. to Wood’s Ind. Test—Supplement to Wood’s 
Index testaceologicus, 1855 (not accessible in Calcutta). 
Genus UNIO, Retzius. 
T.—Inpia. 
No. 1.—Unio Corrueatus, Mill. sp. Rivers of Coromandel. 
Mya corrugata, Miull., p. 214, No. 398. 
Unio corrugata, [a.| Lam., VI., 78, No. 34. 
U. corrugatus, Kiister, Mart. and Chem., p. 289, pl. 97, figs. 3, 4. 
There is the greatest conceivable confusion about this species and 
the next one, and it is far from clear what Miiller’s type was. I 
cannot obtain access to his work in Calcutta, but Kiister copies the 
description thus :— 
Testa rhombea, viridescens, tenera, pellucida ; (umbonibus corruga- 
tis ;) valvule intus siriis radiantibus subtilissimis notantur. 
The figures are, I suppose, those of Chemnitz’s types; they are 
two in number, one representing the exterior of a subequilateral, nearly 
elliptical shell, measuring 36 mm. by 24 in its two diameters, and the 
other the interior of a far more inequilateral shell, also subelliptical, 
rather smaller than the first, and having every appearance of being a 
