. On the anatomy of vertebrates [electronic resource] . ngth; longest, flattest, broadest, andmost curved in the Koala, where they nearly equal the iliac bonesin size. They are always so long that the cremaster muscle windsround them in its passage to the testicle or mammary gland, andthe uses of these bones will be described in treating of thatmuscle. Homologically they are the last pair of lumbar haema-pophyses advanced, as in many Reptiles, from the sclerous to theosseous states: teleologically they belong to the category of thetrochlear ossicles, commonly called sesamoid, and are developed
. On the anatomy of vertebrates [electronic resource] . ngth; longest, flattest, broadest, andmost curved in the Koala, where they nearly equal the iliac bonesin size. They are always so long that the cremaster muscle windsround them in its passage to the testicle or mammary gland, andthe uses of these bones will be described in treating of thatmuscle. Homologically they are the last pair of lumbar haema-pophyses advanced, as in many Reptiles, from the sclerous to theosseous states: teleologically they belong to the category of thetrochlear ossicles, commonly called sesamoid, and are developed inthe tendon of the external oblique which forms the mesial pillarof the abdominal ring, as the patella is developed in the tendon ofthe rectus femoris. I cannot, however, participate in the opinionof Laurent and De Blainville,1 that the marsupial bones are super-added to the abdominal muscles to aid in an unusually energetic 1 4 Bulletin des Sciences Medicales of Ferussac, 1827, No. 77, p. 112, and the Annales dAnat. et de Physiologie, 1839, p. Right os innominatum andbone, Wombat. SKELETON OF MARSUPIALIA. S57
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