Prof. H. Mohl on the Structure of Dotted Vessels. 393 longitudinalis piscis 16 uncias, perpendicularis 5^, transversalis 1 j. Radii:— Br. 6; D. 12|10 ; A. 3|9 ; C. 17; P. 14; V. \\5r— Pisces Austr., p. 26. Parkinson^s sketch represents the ground colour of the body as aurora-red, with an oblong vertical spot of a deeper tint on each scale. The Scicena aurata of G. Forster, pi. 208, taken in Queen Charlotte's Sound on the 18th of October 1774, may be the same species, though the fin-rays do not ex-actly correspond, being, as near as they can be made out from the figure, D. 12112, A. 3|6 ; nor are the scales of the opercular pieces shown. Forster ascertained the native name of this fish to be " ghooparee.^^ [To be continued.] XLIII. — Some Remarks on the Structure of Dotted Vessels^*, By Professor Hugo Mohl. Translated from ^Linnaea,' vol. xvi. p. 1, 1842, by the Rev. M. J. Berkeley, M.A., F.L.S. [With two Plates.] Notwithstanding the numerous observations which have been published on the structure of dotted vessels, the more recent treatises on the anatomy of plants show that no gene-rally received notions prevail at present on the subject. It may not therefore be superfluous if in the following pages I submit to a more complete investigation some points in their structure to which my attention was turned last year when preparing a dissertation on the subject. That the difference between my views and those of other phytotomists may be more easily seen, I shall briefly bring together the notions which have been more recently expressed on the subject. Although many of the earlier observers, especially Leeu-wenhoek, Hill, Van Marum, and Hedwig,were acquainted with the dotted vessels, they were first expressly distinguished from the spiral and scalary vessels by Mirbel. He consi-dered their dots as elevations which projected on the exterior of the vessels, and were perforated by a real aperture. He was not acquainted with the articulations of these vessels, and he altogether denied the transition of different forms of vessels into one another. As he distinguished the border • from the dot, and was acquainted with the uniform membrane extending between the dots, although his observations in many respects were not correct, he nevertheless laid a founda-* Getiipfelten Gefasse (glandular fibre and in part dotted ducts, 'LindL Introd.'1832.) Aym. ?^ Mag. N. Hist. Vol. ix. 2 D
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