. The American journal of anatomy. l^.f 425 426 RANDOLPH WEST vacuolated mesenchyme just lateral to the caudal muscle plateand parallel to the axis of the notochord, and occasional verysmall longitudinal spaces may be seen in the most lateral portionof the caudal muscle plate. In one or two sections, one end ofthe strand of myoblasts was seen to be in connection with themuscle plate. Whether these cells were splitting off from themuscle plate b}^ delamination, or whether they were formingfrom the mesenchyme and being added to it by accretion, itwas not possible to determine in the material ava
. The American journal of anatomy. l^.f 425 426 RANDOLPH WEST vacuolated mesenchyme just lateral to the caudal muscle plateand parallel to the axis of the notochord, and occasional verysmall longitudinal spaces may be seen in the most lateral portionof the caudal muscle plate. In one or two sections, one end ofthe strand of myoblasts was seen to be in connection with themuscle plate. Whether these cells were splitting off from themuscle plate b}^ delamination, or whether they were formingfrom the mesenchyme and being added to it by accretion, itwas not possible to determine in the material available. 2. Morphogenesis Up to this point we have considered the histogenetic changeswhich take place in the developing lymphatic plexus, and weshall now consider the morphogenesis of the plexus. For thispurpose four wax reconstructions have been made by the methodof Born, three of which are here reproduced. Chick of 11 vim. Reconstructions of vessels and isolated spacesof the caudal region. X 150. Figure 12: Arteries black, veins
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectanatomy, bookyear1901
