OCR Text |
Show 1871.] IN THE BRITISH MUSEUM. 671 forked. Scales not very small. Upper parts green, sides and lower parts silvery, with numerous brown dots. One example, 23 inches long, has been obtained by Dr. B. Meyer at Manado. HEMIRHAMPHUS ACUTUS. D. 13. A. 17. L. lat. 53. The length of the head is somewhat more than one third of the total (without caudal), the length of the lower jaw (beyond the extremity of the upper jaw) a little more than one half of the length of the head. The triangular part of the upper jaw formed by the intermaxillaries is rather longer than broad. The diameter of the eye is a little less than the width of the interorbital space, and contained once and two thirds in the length of the postorbital portion of the head. Vertex and interorbital space flat. The base of the ventral fin is midway between the root of the caudal and the gill-opening. Dorsal and anal fins scaleless, nearly equally long; the dorsal commences a little in advance of the anal. Caudal fin forked, the lower lobe being the longer; its central rays longer than the eye. Sides with a well-defined silvery stripe. One specimen, 6 inches long (no. 264), from the Godeffroy M u seum. From Rarotonga, Cook's Islands. HEMIRHAMPHUS GAMBERUR (Riipp.). Having received specimens of this species through the kindness of the Marquis J. Doria, I am enabled to point out the characters by which it is distinguished from H. dussumieri. D. 14. A. 14. L. lat. 50. Body subtetrahedral. The length of the entire head is twice that of the lower jaw, and one third of the total (without caudal). The triangular part of the upper jaw, formed by the intermaxillaries, is broader than long. The diameter of the eye equals the width of the interorbital space, and is two thirds of the length of the postorbital part of the head. The root of the ventral fin is somewhat nearer to the head than to the base of the caudal. Dorsal and anal fins scaly, the former rather longer than the latter. Caudal fin deeply forked, the central rays about as long as the eye. Sides with a well-defined silvery band. Red Sea. ENGRAULIS BOELAMA (Forsk.). B. 11-12. D. 15. A. 29-32. L. lat. 36-42. The height of the body is one fourth or two ninths of the total length (without caudal), the length of the head one fourth or rather more than one fourth. The depth of the head is three fifths of its length. The diameter of the eye is a little more than the length of the snout, and two ninths of that of the head. Snout obtusely conical, much projecting beyond the lower jaw. Minute teeth in both iaws.' The maxillary becomes gradually broader, and is obliquely PROC. ZOOL. S O C - 18/1, No. XLIII. |