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Show 732 DR. R. 0. CUNNINGHAM ON THE [June 6, EXPLANATION OF THE PLATES. PLATE XLI. Chrysichthys biittikoferi, adult, p. 721, 4/9 nat. size. Dentition nat. size. PLATE XLII. A. Chrysichthys biittikoferi, juv., p. 723. B. Hemichromis tersquamatus, p. 717. PLATE XLIII. Chrysichthys persimilis, p. 727, 5/7 nat. size. PLATE XLIV. Chrysichthys camaronensis, p. 729, 1/3 nat. size. Dentition nat. size. PLATE XLV. A. Chrysichthys kinysleyce, p. 728, 6/7 nat. size. B. Petersius occidentalis, p. 731, with enlarged views of anal fin of male and female, and of dentition. 2. On a few Points in the Structure of Laborde's Shark (Euprotomicrus labordii). By R O B E R T O. C U N N I N G H A M, M.D., C.M.Z.S., Professor of Natural History, Queen's College, Belfast. [Received April 28, 1899.] An individual of this curious and little-known Elasmobranch having recently reached my hands, I have drawn up a few notes on its anatomy, which, though very imperfect and fragmentary, I venture to submit to the Zoological Society of Londou. The specimen, which is a female, was, I am informed, one of several obtained by Captain F. R. Patey, of the ship ' M o w wan,' having been washed on board his vessel between 90° & 100° W . long, and in about the latitude of Cape Horn, and was presented to cur Museum in Queen's College through the intervention of Mr. Adam T. Barklay of Belfast. As examples previously met have been recorded as inhabiting the Indian Ocean, the range of the species must be considerably more extensive than was formerly supposed-a not surprising circumstance when the wide distribution of many pelagic species of animals is taken into account. Two causes have combined to render the following description much less complete than I could have desired. In the first place, I have not felt warranted to carry out th§ dissection to such an extent as to render the specimen unavailable for Museum purposes, and, secondly, the condition of the viscera was unfortunately not such as to permit of detailed examination. In respect of size my example does not materially differ from those |