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Show 420 THE MARQUIS OF TWEEDDALE ON BATRACHOSTOMUS. [May 15, The British species have been restricted to three (or perhaps four), in none of which has the snout a soft conical prolongation. The C. oxyrhynchus belongs to the subdivision in which a soft conical prolongation of the snout is present. Coregonus oxyrhynchus. The specimen I obtained is about 7 inches in length, and may be briefly described as follows: - B. ix, D. 14, P. 15, V. 6, A. 15, L. 1. 80, L. tr. ^. Length of head 5, of caudal fin 5\, height of body 6 in the total length. Eyes, diameter 4 | in the length of the head, \\ diameter from the end of snout, and li apart. Teeth absent from the jaws. Fins, pectoral as long as the head excluding the snout. Scales, 7| rows between the lateral line and base of the ventral fin. As this fish is found along the coasts and entering the fresh waters of Holland, Germany, and Denmark, it is remarkable that it has not been recorded from the east coast of England, as stragglers are probably of no rare occurrence. 2. Notes on the Species of the Genus Batrachostomus inhabiting the Indian Region. By A R T H U R , Marquis of TWEEDDALE, F.R.S. [Received May 15, 1877.] (Plates XLV.-XLIX.) The rarity in our collections of examples representing the different members of the genus Batrachostomus in all their various states of plumage, the want of field-collectors' notes to elucidate the few that do exist, the variability and intricacy of the markings by which they are characterized, and consequent difficulty, more especially in the males (?), of conveying by mere description, and even by coloured drawings, an adequate conception of their distinctive external characters, have combined to retard our knowledge of the genus. The group was unknown to the older zoologists ; and Dr. Hors- |