. Journal of anatomy. e of the liver depending between the two. The bodyand elongated right process are suspended on the great omentum (lesser sac),being related to the greater curvature of the left limb as far to the right asthe bend in the stomach. The process is less closely attached than the short, wide left dorsal process is outside the lesser sac, being connectedto the mesocolon of the distal colon by the triangular fold, the left lateral 8 Dr W. Colin Mackenzie or lieno-mesocolic, which is more developed in some specimens than inothers. It is free from the dorsal wall and ventr
. Journal of anatomy. e of the liver depending between the two. The bodyand elongated right process are suspended on the great omentum (lesser sac),being related to the greater curvature of the left limb as far to the right asthe bend in the stomach. The process is less closely attached than the short, wide left dorsal process is outside the lesser sac, being connectedto the mesocolon of the distal colon by the triangular fold, the left lateral 8 Dr W. Colin Mackenzie or lieno-mesocolic, which is more developed in some specimens than inothers. It is free from the dorsal wall and ventrum of the left (^th as regards its shape and the disposition of the left lateral fold, thespleen of the Macropod presents the primitive Mammalian type, and re-sembles closely that of the Monotreme. Opossum (Trichosurus—Pseudochirus). In Trichosurus a marked advance towards the human type of spleen isto be noted, and light is thrown on the formation of the lieno-renal ligament Bile duct MESENTSRILEAL JUNCTION. O-MESOCOLIC rOLDWITHRENAL ATTACHMEHT, ESOCOLON MESENTERy Fig. 6. —The gastro-intestine and spleen in Trichosurus. and the mode of fixation of the distal colon and spleen. Although threeportions of the spleen are noted, viz. body, right and shoit left processes,the organ is more compact and the processes less defined than in the preced-ing mammals (fig. 9). The body is directed towards the resophagus and issuspended—like the right ventral process, which is directed along the greatcurvature of the stomach—on the great omentum, lesser sac. The width of the great omentum (gastro-splenic) at the extremity ofthe body is 15 cm., and at the extremity of the right process the width is55 cm., so that the narrowing gastro-splenic omentum is here well short left dorsal process is outside the lesser sac in relation with the The Spleen in Monotremes and Marsupials 9 left lateral fold. Its average length is only 1-5 to 2 cm The total averagelength of the
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Keywords: ., bookcentury1800, bookdecade1860, booksubjectanatomy, bookyear1867
