| OCR Text |
Show 632 MR. E. A. SMITH ON LAND AND FRESHWATER [Nov. 7, posterior margin; pectoral fin extending to the origin of the anal. Scales rough, apparently uniform greenish, with a blackish spot on the end of the operculum; two narrow blackish bars across the upper surface of the snout; the soft dorsal with a row of rounded darker spots behind each ray. One specimen. CHROMIS DIAGRAMMA, sp. n. (Plate LVIII. fig. B.) D. ^~8- A. \. L. lat. 30. L. transv. 7 & , very a^n ones. This species has the upper profile of the head descending in a curve, reminding one of Biagrammct. Teeth bicuspid, the inner cusp being the longer and brown; twenty-eight on each side of the outer series of the upper jaw. Scales below the eye in four series. In a specimen 3| inches long the diameter of the eye equals the width of the praeorbital and the depth of the scaly portion of the cheek, but is less than the width of the interorbital space, which is convex. The angle formed by the praeopercular limbs is a right one. The height of the body is rather more, and the length of the head less, than one third of the total (without caudal). The length of the last dorsal spine is two fifths of that of the head; caudal scaleless, with vertical posterior margin ; pectoral fin extending to or nearly to the origin of the anal. Scales rough, with minute spines on the margin. The coloration seems to be uniform greenish, in the smaller specimens with indistinct narrow darker cross-bands. Three specimens, the largest of which is 3| inches long. EXPLANATION OF PLATE LVIII. Fig. A. Chromis horei, p. 630. B. Chromis diagramma, p. 632. C. Chromis burtoni, p. 631. 3. O n a Collection of Land and Freshwater Shells transmitted by M r . H . H . Johnston, C.B., from British Central Africa. By E D G A R A. S M I T H. [Eeceived August 28, 1893.] (Plate LIX.) The specimens comprised in this collection were obtained partly by Mr. R. Crawshay at Lake Mweru, Lake Tanganyika, and on the northern part of Lake Nyasa, and partly by Mr. A. Whyte at the southern end of the last-mentioned lake. They have been presented to the British Museum by H . H . Johnston, Esq., C.B., H.M. Commissioner in British Central Africa, to whom that insti- |
