Plagiostomata of the Pacific. Pt. I. Fam. Heterodontidae / by N. de Miklouho-Maclay and William Macleay.

  • Nicholas Miklouho-Maclay
Date:
[1878]
Catalogue details

Licence: Public Domain Mark

Credit: Plagiostomata of the Pacific. Pt. I. Fam. Heterodontidae / by N. de Miklouho-Maclay and William Macleay. Source: Wellcome Collection.

Provider: This material has been provided by The Royal College of Surgeons of England. The original may be consulted at The Royal College of Surgeons of England.

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    specimens of H. Phillipi, as is shown in figs. 16 and 17 (pi. 24). The posterior teeth of H. Francisi were all of almost the same size, and shewed a distinct mesial line on their upper surface. The mesial line of some teeth was nodose. In the upper jaw I found 25 vertical rows of teeth; in the lower jaw, 23. As regards the number of teeth in the vertical rows, I could not attain to any certainty, as the mouth could not be opened far enough to enable me to count them with precision.* ** ON THE EXTERNAL GENITAL ORGANS OF THE MALE H. PHILLIPI. As I have before me a large number of sketches of these parts, as seen in various species of sharks, in which, in spite of a simi- larity in many points, there are yet considerable variations, it appears to me expedient to postpone giving a comparative resume of these drawings until in proper order, a selection of the sketches in question has been given. In the mean time I may observe that the drawings Figs. 20—24, pi. 24—are the more deserving of attention, that they were made from fresh preparations, the parts being care- fully preserved in situ during the preparation of the transverse and longitudinal sections.## * Figures of tlie anterior-teeth of II. Quoyi are to he found both in the Magasin de Zoologie, 1839, and also in Dumeril. (Atlas, pi. 3, figs. 16 and 17.) ** A description—on the whole correct—of the external sexual parts of the male Plagiostomata (organes copulateura or appendices externes or mernbres accessoires), is to be found in A. Dumeril. (Histoire Nat. des Poissons. Tome I., 1866, pag 233 et seq.) A short dissertation on the significance of these organs as “ organes destines d une veri- table intromission,” is to be found in the same work. (Pag 240, et seq.) [23]