File:Image from page 84 of "The American journal of anatomy" (1901) (14784375915).jpg

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Identifier: americanjournalo02wist Title: The American journal of anatomy Year: 1901 (1900s) Authors: Wistar Institute of Anatomy and Biology Association of American Anatomists Subjects: Anatomy Anatomy Publisher: Baltimore, MD : [s.n.] Contributing Library: MBLWHOI Library Digitizing Sponsor: MBLWHOI Library


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Text Appearing Before Image: ults of thisinvestigation, together with a few obser-vations concerning similar relations foundin other domestic animals, are included inthe following pages. In this connection,I would express my thanks to Dr. L. F.Barker, of the University of Chicago, inwhose laboratory some of the latter partof the work was done. The specimens examined, 34 in all,were preserved in formalin (5^) or a mix-ture of formalin and alcohol (formalinb^i, alcohol 70^). The vessels were in-jected with Griiblers gelatin injectionmass. Five specimens were imbedded incelloidin or paraffin and sectioned. The remaining specimens were ex-amined after hardening, by means of free-hand razor sections. The penis of the cat has the typical mammalian form, as shown inFig. 1. AVithin the glans is sometimes found the os penis (Figs. 2 1 Tliere is a brief reference in Bonnets Entwicklungsgescbichte der Haussauge-tbiere to the fact that in the cat the corpora cayernosa are largely transformed intoa non-erectile fatty cushion.

Text Appearing After Image: Fig. 1. Ventral surface of thel>enis of the cat. X 3- u. urethra;eg-, Cowpers glands; oc. crus penis,covered by ischiocavernosus; b,bulbus urethrae. covered by bulbo-cavernosus; rp, retractor penismuscle; pr, prepuce; g. glanspenis; me, meatus urinarius ex-ternus. 74 Corpora Cavernosa in the Domestic Cat and 3). This bone is by no means constant in its occurrence. Of thespecimens examined, in 7 kittens {2 half-grown), and 5 small-sized cats,no trace of an os penis was found. In 9 specimens of medium-sizedcats, 3 showed a very small rudimentary os penis, the others none. Of12 large-sized cats, 8 had a well-developed os penis (3 mm. to 5 mm.long); 2 a small or rudimentary bone; and 2 no trace of bone. It there-fore appears that the os penis of the male cat is inconstant and acquiredrelatively late in life, certainly not until long after sexual maturity. The OS penis, when well developed, is about 5 mm. long and shapedlike a long tapering cone. It is placed dorsal to the urethra, and


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