Francis Day described six new clupeoid fishes: Spratelloides malabaricus, Clupea sindensis, Clupea variegata, Chatoessus modestus, Pellona sladeni and Engraulis auratus. For the first of these the new genus Dayella is proposed. Except for the last, all are considered valid. Lectotypes have been chosen from among Day's figured specimens now in the Zoological Survey in Calcutta, except in the case of E. auratus for which a British Museum specimen has been chosen. The history of Day's fish collections is briefly outlined; the Calcutta specimens are considered to be the most important, followed by those in Sydney, Vienna, Leiden, Berlin, Florence and Chicago. Apart from some small collections prior to 1870, the British Museum received only the remainders (in 1889).