File:On the anatomy of vertebrates (electronic resource) (1866) (14564066948).jpg

Identifier: b20416039_003 (find matches)
Title: On the anatomy of vertebrates (electronic resource)
Year: 1866 (1860s)
Authors: Owen, Richard, 1804-1892
Subjects: Anatomy, Comparative Vertebrates Fishes Reptiles Mammals Birds
Publisher: London : Longmans, Green
Contributing Library: Wellcome Library
Digitizing Sponsor: Wellcome Library

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also that of the tibialis posticus. § 195. Muscles of Lissencephala.—The Rodentia closely re-semble the Marsupialia in their muscular system; with likemodifications according to the absence or presence of clavicles,and to the gradatory, saltatory, scansorial, and fossorial move-ments of the species respectively. They have not the marsupialmodifications of the cremaster and abdominal muscles, nor therotatory muscle of the tibia; but certain Rodents show pecu-liarities of the masseter which will be noticed in connection withthe organs of mastication. MUSCULAR SYSTEM OF MAMMALIA. 17 The Insectivora afford examples of special muscular develope-ment in the fore part of the trunk and pectoral limbs of the Mole,fig. 6, and in the muscles which act upon the prickly skin ofthe Hedgehog, figs. 7 and 8. The dermal muscles are powerful and extensive in all Insec-tivora: in the Mole (Talpa eitropcea), fig. 6, the insertion ofone of these is seen at a : it assists in retracting the trowel-like 6
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Muscles of the fore part and limbs of a Mole (Talpa europcea). xlhi. fore limb ; and, when this is the fixed point, draws forward thepelvis and thigh. The muscles of the scapula are singularly de-veloped and modified: the trapezius operates upon the short basedff the elongate bone with great advantage. The anterior portion,d, arising from the occiput, derives further strength from the ossi-fied nuchal ligament, and is inserted at e: the part answering tothe posterior fibres of the muscle, ff arises as far back as thelumbar vertebrae to be similarly inserted into the base of the sca-pula, antagonising the former. The (splenius capitis? h, derivesfibres from the nuchal style, as well as from certain dorsal andcervical vertebras: it is inserted into the paroccipital region of thecranium. The sterno-mastoid, g) joined by a f cleido-mastoidfrom the cubical clavicle, is a very powerful muscle which expandsto be inserted into the lateral part of the superoccipital and fasciacovering the mand

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