Foure of these are called Gemini or Twins, by reason of the similitude of their thicknesse, originall inserrion and action; the two other are called Obturatores, be∣cause they stop the hole which is common to the share and backe-bones.
Now one of the two Flexores, being round, descends on the inside with fibers of an unequall length from all the transverse processes of the loines, above the hinde com∣missure of the hanch and share-bones, and is inserted into the little Trochanter; the other broader and larger from the originall passes forth of the whole lippe, and inner brow of the hanch-bone, and filling the inner cavity thereof, is inserted above the fore part of the head of the thigh, into the little Trochanter by a thicke tendon, which it with the follow muscle lately described, produces, even from the fleshy part thereof, wherefore you neede to take no great paines in drawing, or plucking them away.
The three Tensores or extenders, make the buttocks, of which the first being the thicker, larger, and externall, arising from the rumpe, the holy-bone, and more than halfe of the exteriour and hinder lippe of the hanch-bone, is inserted by ob∣lique fibers, some foure fingers breadth from the great Trochanter at the right line, which we said, resembled an Asses backe.
The second, which is the middle in bignesse and site, descends from the rest of the lippe, and from the for•• and outward ribbe of the hanch-bone, and above the midst of the bone, is inserted into the upper part of the great Trochanter by a triangular insertion above the upper and exteriour part thereof.
The third being lesser, shorter and thinner, lying hidde under these former, pro∣ceeds from the middle of the externall surface of the hanch-bone, and then is ins••∣ted into the greater part of the right line of the great Trochanter.
These three muscles have a great and large originall, but a narrow insertion, as it were by oblique fibers.
Then follow those three muscles which move the thighes inwards, straiten and crosse then, so that the knee stands forwards or outwards, but the heele is drawne in∣wards, as you may understand by their insertion, although some thinke otherwise; But these three muscles by their originall, partly fleshy, and partly membranous, arise from the upper and fore part of the circumference of the share-bone, and thence are in∣serted into the hinde line of the huckle-bone, some higher than othersome; for the lesser and shorter stayes at the roots of the little Trochanter, the middle descends a lit∣tle deeper, the 3. with the longest of his fibers, descends even to the midst of the line.
This if it be so, that is, these muscles proceeding from the fore and upper part, to be inserted into the hinder line of the huckle-bone, whilest they alone performe their action, and draw the thighs together, they will turne them outwards, just so as when we put them acrosse, but they will not draw one heele to another, and put t•…•… heele outwards, for such like motion is performed by the inner Vaste muscle of the thigh, moving the legge. Now follow the sixe which move the buttocks.
The first, and higher of the Quadrigemini, or the foure twin muscles, passes forth of the commissure of the holy-bone, with the bone of the rumpe, or rather from the lowest extreme of the holy-bone, and thence it is inserted into the cavity of the great Trochanter by a tendon of a sufficient largenesse.
The second proceeding from the hollow part or fissure, which is betweene the ex∣tremity of the huckle-bone, and the tuberositie, or swelling out of the same, is inser∣ted in like manner into the cavity of the great Trochanter.
The third, ascends from the inner part of the swelling out of the huckle-bone, a little above, betweene the two Trochanters, into the cavity of the greater of them.
The fourth, and last, the lowest and broadest of them all proceeds from all the exteriour protuberancie of the huckle-bone, and thence is inserted into the great Trochanter, and these foure muscles lie hid under the thicke and more eminent part of the buttocks; wherefore that you may the better shew them, they must be turned up towards their originall.
The two Obturatores remaine to be spoken of, that is, the internall and ex∣ternall, both which arise from the circuite and circumference of the hole which they stoppe, which as wee said is common to the share and huckle-bone,