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Show J885.] MR. F. DAY ON A HYBRID PLEURONECTID. 929 before the middle, the surface impressed with a transverse groove, interrupted at the middle, finely punctured within the groove, the rest of the surface impunctate. Scutellum fulvous. Elytra closely and finely but distinctly punctured, the entire anterior portion to slightly below the middle black, but this -colour not quite extending to the shoulders, which remain of the fulvous ground-colour ; a triangular black spot is placed close to the apex of each elytron. Underside and legs fulvous ; the sides of the breast very narrowly marked with black. Hab. Agoue (Benin). (Coll. Oberthur and m y own.) This species, although evidently closely allied to D. aperta, Harold, seems to differ sufficiently to justify its separation. The elytra in D. oberthuri, besides being closely punctured, of which Von Harold makes no mention, are devoid of any basal elevation ; their black anterior portion will separate the species from D. aperta aud several other allied forms in which the elytral bands are narrow. DlACANTHA VIRIDIPENNIS, Sp. nOV. Fulvous ; terminal joints of the antennas and the tarsi black ; elytra closely punctured, metallic green. Length 2 | lines. Head impunctate, with the usual transverse groove between the eyes; antennae with the four first joints fulvous, the rest black, third and following joints equal. Thorax about twice as broad as long, the sides very slightly rounded in front, the disk with a deep transverse groove, not interrupted at the middle. Scutellum fulvous. Elytra without any basilar elevation, closely and distinctly punctured, entirely metallic green. Underside and legs fulvous ; tarsi black ; claws appendiculate ; anterior coxal cavities open. Hab. Africa, Quanauga Strom (Major v. Mechow). (Coll. Ober-thiir and my own.) 5. On a supposed Hybrid between the Dab (Pleuronectes limanda) and the Flounder (P. flesus). By F. D A Y , F.Z.S. [Eeceived November 27, 1885.] (Plate LXII.) On November 20th my attention was arrested at a fishmonger's shop in Cheltenham by a curious-looking pleuronectoid fish with the following characters and dimensions :- D. 74. P.r. 11, L. 9. V.r. 6, 1. 6. A. 60. C. 14. L. 1. 92. Entire length 15 inches Length of head 2*9 „ Length of caudal fin 2*4 ,, Height of body 6*4 „ Eyes on right side, diameter 0*6 in. ; 0*2 apart ; 0*5 from end of nout. The lower jaw slightly in advance of the upper ; the maxilla |