. The anatomy of the frog. Frogs -- Anatomy; Amphibians -- Anatomy. 16 THE BOXES AXP JOTXTS. acquainted with its histolog-ical peculiarities. I£ a long bone of the frog be dried, the femur for example, the middle part is foimd to differ considerably from the epi- physes in colour and in other par- ticulars. The shaft alone has the appearance of bone, the epiphysis consisting of a white, opaque, firm substance, I'esembling plaster of Paris or lime, but which iff the fresh moist state is exactl}" like cartilage. The epiphyses, which are fitted to the ends of the dia- physis like the cap of
. The anatomy of the frog. Frogs -- Anatomy; Amphibians -- Anatomy. 16 THE BOXES AXP JOTXTS. acquainted with its histolog-ical peculiarities. I£ a long bone of the frog be dried, the femur for example, the middle part is foimd to differ considerably from the epi- physes in colour and in other par- ticulars. The shaft alone has the appearance of bone, the epiphysis consisting of a white, opaque, firm substance, I'esembling plaster of Paris or lime, but which iff the fresh moist state is exactl}" like cartilage. The epiphyses, which are fitted to the ends of the dia- physis like the cap of a stick- handle, have sharply defined mar- gins (Fig. 3), as is well seen in I'igs. ofi, 39, 45, and 46. If a sec- tion be made through the epiphysis and part of the diaphysis, the long tube of tnie bone is seen to cease abruptly above 0, Fig. 3, and over the end of it the epiphysis E is fixed. This epiphysis consists al- most entirely of calcified cartilage c, and has merely a superficial layer of hyaline cartilage A. The bony cylinder of the diaphysis 0, which contains the marrow M in its interior, is shut off from the epiphysis by hyaline cartilage, the cells of which are arrano-ed in transverse lavers, Longitudinal section through the upper ex- tremity of the femur of Rana efculfiita, magnified. A Hyaline cartOage (articular cartilage). c Hyahne cartUage closing end of bony cylinder. <•' Calcified cartilage of epiphysis. D Bony cylinder of diajJiysis. E Epijjhysis. M Marrow cavity. o End of diaphysLs. I. THE VERTEBRAL COLUMN. The verlehral column of the frog consists of ten bones, riz. nine tnie vertebrae, and the rod-shaped urostyle, which alone is almost as long as all the remaining vertebrae. I. General Descriptiox of the xixe Vertebrae. a. The ladies of the vertebrae are compressed from above do\ATi- wards ; the posterior siarface of each body, with the exception of. Please note that these images are extracted from scanned page images that may have been digita
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