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Show 1 12 REV. O. P. CAMBRIDGE ON SOME NEW [Jail. 21, serrated internally ; adipose dorsal commences not far from the extremity of the first dorsal, and its base is a little longer than that of the anal ; caudal forked, the lobes of nearly equal lengths. Colours -. a dark spot on the shoulder, and a second on the base of the adipose dorsal fin ; body with indistinct cross bands. Hab. Tenasserim provinces. One specimen (Blyth's typical one), 3j inches in length, is in the Calcutta Museum. MACRONES LEUCOPHASIS. Bagrus leucophasis, Blyth, J. A. S. of Beng. 1860, p. 148. D. i|0. P. g^. V. 6. A. |. C. 17. Length of head f, of pectoral ^, of caudal f, height of body f, of dorsal fin j of the total length. Eyes, diameter | of length of head, 1| diameter from end of snout, and 1 apart. Head somewhat compressed, snout rounded, the upper jaw slightly the longer. The snperior longitudinal groove on the upper surface of the head does not quite reach the base of the occipital process, which last is twice as long as wide at its base, while there is a short interspace between its termination and the basal bone of the dorsal fin. Upper surface of the head slightly rugose. Barbels : the nasal reach the anterior margin of the orbit, the maxillary the end of the anal fin, the external mandibular to the middle of the pectoral, and the internal to the gill-opening. Teeth in an uninterrupted crescentic band on the palate. Fins: dorsal spine moderately strong, as long as the head from the angle of the mouth, finely serrated posteriorly in its upper fourth ; the adipose fin commences just behind the first dorsal, and the length of its base is nearly double that of the rayed fin ; pectoral spine much stronger than the dorsal, of about equal length, whilst it is coarselv serrated internally. The ventral arises behind the posterior extremity of the dorsal; caudal deeply forked, the lobes having filamentous prolongations. Colours : of a deep purplish black over the body and fins; numerous white dots exist on the body, most apparent after death. Hab. Burmese rivers, attaining 12 inches or more in length. Its native name signifies " topsy turvy," as it is said to swim with its abdomen uppermost. In the definition of the genus Bregmaceros, Thompson, the presence of an air-vessel and pyloric appendages has been denied ; the former is, on the contrary, comparatively very large (in B. atripinnis, Day), whilst it has two pyloric appendages. 5. On some new Genera and Species of Araneidea. By the Rev. O. P. CAMBRIDGE, M.A., C.M.Z.S. [Received December 2, 1872.] (Plates XII.-XIV.) The curious and minute Spiders described in the present paper are a strong disproof of an idea, very common among collectors, that |
