Image from page 121 of “Handbook of the marine and freshwater fishes of the British Islands : (including an enumeration of every species)” (1883) – more Marine Life goodness curated by www.SardineRunPE.co.za
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Title: Handbook of the marine and freshwater fishes of the British Islands : (including an enumeration of every species)
Year: 1883 (1880s)
Authors: Kent, W. Saville (William Saville), d. 1908 Holdsworth, Edmund Willam Hunt, 1829-1915. Apparatus for fishing Walpole, Spencer, Sir, 1839-1907. British fish trade Bertram, James Glass, 1824-1892. Unappreciated fisher folk, their round of life and labour Fryer, Charles Edward. Salmon fisheries
Subjects: Fisheries Fishes Fish trade
Publisher: London : W. Clowes and Sons
Contributing Library: Smithsonian Libraries
Digitizing Sponsor: Biodiversity Heritage Library
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daylight, but waking into life with theapproach of dusk, and then swimming swiftly to and fro oraround their tanks with a peculiarly graceful gliding motion.The eye-coverings in these fish are remarkably complex;within the first or outer eyelid, which closes upwardslike that of a bird, is a second protective envelope, actingas a diaphragm, and which throughout the day is, with the OF THE BRITISH ISLANDS. 3 exception of a narrow oblique slit, entirely closed over thetrue eye. When darkness has fully set in, this diaphragmis completely retracted, leaving the eyeball free and gleam-ing like that of a cat or other nocturnal mammal. Thisphenomenon, observed by the writer of examples in theBrighton and Manchester Aquaria, may be corroboratedby an examination of the specimens now on view in theExhibition tanks. In the Skates, presently described, it willbe found that a very beautifully constructed fimbriatedmembrane takes the place of the diaphragm that coversthe eye of the Spotted Dog-fish.
Text Appearing After Image:
FIG. 28.—EGG OF SPOTTED DOG-FISH. The last upon the list of the Shark tribe is the Monk-fishor Angel-fish (Rhina squatind), No. 214, which in itsflattened form, and the great development of the pectoralfins, closely approaches the Rays, the lateral position of itsgill-openings, partly hid by the pectoral fins, being how-ever accepted by ichthyologists as of sufficient importanceto justify its retention among the present group. Addi-tional evidence in support of its preponderating affinitiesin the same direction is afforded by its mode of locomotionin the water, observed by the writer of examples in aquaria,and which is entirely that of a Shark, being effected by the H4 MARINE AND FRESHWATER FISHES powerful sculling action of the oar-like tail, and not by theaid of the pectoral fins, as in the Rays. In recognitionof the intermediate positions it occupies between these twogroups, it is in some localities distinguished by the nameof the Shark-Ray; the Fiddle-fish and the Kingstone areo
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