Ophidians, zoological arrangement of the different genera, including varieties known in North and South America, the East Indies, South Africa, and AustraliaTheir poisons, and all that is known of their natureTheir galls, as antidotes to the snake-venom .. . n which are seen the peculiar oblique-angledcrystals marked a, a, a, in Fig. 13. Fig. 14 shows the ultimate eifect of^the venom upon mus-cular fibre, made apparent by disturbing it mechanically. continues : ^ The final influence of the venom uponmuscular structure was extremely curious. In every instanceit softened it in propor
Ophidians, zoological arrangement of the different genera, including varieties known in North and South America, the East Indies, South Africa, and AustraliaTheir poisons, and all that is known of their natureTheir galls, as antidotes to the snake-venom .. . n which are seen the peculiar oblique-angledcrystals marked a, a, a, in Fig. 13. Fig. 14 shows the ultimate eifect of^the venom upon mus-cular fibre, made apparent by disturbing it mechanically. continues : ^ The final influence of the venom uponmuscular structure was extremely curious. In every instanceit softened it in proportion to the length of time during whichit remained in contact with it, so that after even a few hoursin warm-blooded animals, and after a rather longer time inthe frog, the wounded muscle became almost diffluent, andassumed a dark color and somewhat jelly-like structure remained entire until it was pressed upon orstretched, when it lost all regularity, and offered the appear- * Wedl, Pathological Histology, Trans, of the Sydenham Society, , 264, 271. f Mitchells Researches, &c. EFFECT OF VENOM ON MUSCULAR FIBRE. 183 ance under the microscope of a minutely granular mass, dottedwith larger granules, as shown in Fig. 14. Fig. Appearance of muscular fibre after contact with venom. By S. WeirMitchell, Structure of the Venom- Gland. The sfigma shown in Fig. 15 gives the microscopical ap-pearance of the structure of the venom-gland. The coeca lie in the centre, and the ducts are disposed oneither side parallel to each other. Outside of the cellular layer, the poison-duct is made upprincipally of white fibrous tissue, with a small proportion ofvery fine fibres of yellow elastic tissue. The walls of the ductare provided throughout with an abundant supply of blood-vessels. Its communication with the fang and the mode ofinjection of the poison have been described on another page,and any one desirous of knowing all the details of a minute 184 OPHIDIANS. descri
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Keywords: ., bookcentury1800, bookdecade1870, bookidophidia, booksubjectsnakes
