Framed Prints
Framed Print of Annual report of the Board of Regents of the Smithsonian Institution
Annual report of the Board of Regents of the Smithsonian Institution. Smithsonian Institution; Smithsonian Institution. Archives; Discoveries in science. PARENTAL CARE AMONG FRESH-WATER FISHES. 463 the pectorals are low and horizontal and also spiniferous. From tropical American streams about 30 species have been obtained. The typical Callichthyids of the genera Callichthys and Hoploster- num are most at home in streams with a muddy bottom and in the shallow ditches and pools of marshes. In such places they may con- gregate in considerable numbers, and when the Avater is low may be readily c. Annual report of the Board of Regents of the Smithsonian Institution. Smithsonian Institution; Smithsonian Institution. Archives; Discoveries in science. PARENTAL CARE AMONG FRESH-WATER FISHES. 463 the pectorals are low and horizontal and also spiniferous. From tropical American streams about 30 species have been obtained. The typical Callichthyids of the genera Callichthys and Hoploster- num are most at home in streams with a muddy bottom and in the shallow ditches and pools of marshes. In such places they may con- gregate in considerable numbers, and when the Avater is low may be readily caught with dippers or pails and even with the hand. When so disturbed they are apt to express their feelings by rumbling or grunting sounds. At all times they may come to the surface of the water from time to time to take in gulps of atmospheric air, and these emergences become more frequent with the lowering of the water. At length, if the water entirely disappears, the resort to atmospheric air supplants aquatic respiration, and a curious comple- mentary mode of respiration is substituted for the normal branchial method. This was discovered by a French physiologist—Professor Jobert—who visited Brazil in 1877 and 1878 and undertook some in-. FiG. 38.—IlopJostcrniim litturale. After Boulenger. vestigations at the instance of the Emperor. These were favorably reported on by a special committee of the French Academy of Sciences of which Milne EdAvards was the mouthpiece. Like the common loach of Europe, according to the reporter, the ty2:)ical Callichthvid frequently swallows bubbles of air, parth^ ab- sorbs the oxygen from them by the walls of its digestive tube, and by the same course excretes carbonic-acid gas, which is afterwards evacuated by the anus mixed with the unabsorbed nitrogen. There is, in fact, a complementary resjuration analogous to the pulmonary respira- tion of the terrestrial vertebrates, but having its seat in the intestinal canal.". © Library Book Collection
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Media ID 41044442
Bookcentury1800 Bookdecade1840
Modern Frame 14"x12" (36x31cm)
Ready to Hang Contemporary Framed Prints adds style, protection, and a polished touch to your space - effortlessly.
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Wood effect frame, card mounted, 10x8 fade resistant photo print. Overall outside dimensions 14x12 inches (36x31cm). Environmentally and ozone friendly, 40mm wide x 15mm Polycore® moulding has the look of real wood, is durable and light and easy to hang. Biodegradable and made with non-chlorinated gases (no toxic fumes) it is efficient; producing 100 tons of polystyrene can save 300 tons of trees! Prints are glazed with lightweight, shatterproof, optical clarity acrylic (providing the same general protection from the environment as glass). The back is stapled hardboard with a sawtooth hanger attached. Note: measurements provided are estimated outer dimensions, which include both the image and the frame. While we aim to keep sizing consistent, exact dimensions may vary slightly due to differences in print size or production requirements, which may result in a variation in the overall size (up to approximately 2.5cm (1"))
These are individually made so all sizes are approximate
Estimated Image Size (if not cropped) is 24.4cm x 9.9cm (9.6" x 3.9")
Estimated Product Size is 36cm x 31cm (14.2" x 12.2")
