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Show 558 MR. F. DAY ON INDIAN FISHES. [May 9, 2. DUNSTERVILLIA CORCYNENSIS, 0. Schmidt, S. Ad. p. 16,1.1. f. 5; Supp. ii. t. 1. f. 6. Fam. 3. APHROCERASID^E. Sponge tubular, branched, formed of two coats; outer coat of simple fusiform spicula, placed side by side in the longitudinal axis of the stem and branches. Inner coat and network of interlaced fibres, placed in all directions. Branches simple, attenuated and open at the tip. APHROCERAS, Gray, P. Z. S. 1858, p. 113. A P H R O C E R A S ALCICORNIS, Gray, ib. p. 114, Rad. pl. x. f. 1, 2. Hab. Hong Kong (Dr. Harland). B.M. DESCRIPTION OF PLATES XXVII. & XXVIII. PLATE XXVII. Fig. 1. Dactylocalyx subglobosa (p. 506), of the natural size. From a specimen in the British Museum. 2. Dactylocalyx pumicea (p. 50G), one-eighth of the natural size. From a specimen in the British Museum. PLATE XXVIII. Fig. 1. Corbitella speciosa, p. 530. 2. Heterotella corbicula, p. 531. (Both from photographs of specimens in the Museum of Paris.) 7. O n some N e w or imperfectly known Fishes of Madras. By FRANCIS D A Y , F.Z.S., F.L.S., Madras Army. The following descriptions refer to seven species of fish personally obtained in the Madras Presidency during the last few months. The freshwater ones are from the Toomboodra at Kurnool, the saltwater ones from Madras. They appear to be either new to science or imperfectly known, as none find a place in Dr. Giinther's elaborate •Catalogue of Fishes,' except where they are mentioned in notes without a description, and with the synonymy only, as " species either insufficiently described, or founded on characters so slight that it is doubtful if they will stand as species." Sykes's Pimelodus gogra seems to form the type of a new genus, which I have designated Gogrius. LETHRINUS KARWA, CUV. & Val. B. vi. D. 10/9. P. 13. V. 1/5. A. 3/8. C. 17. L. 1. 46. L. tr. 5/16. Length of specimen 15 inches. Length of head T\, of pectoral above \, of caudal i, of base of dorsal nearly i, of base of anal i of the total length. Height of |