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The embryology of the human eye has been dealt with more or less superficially in the past. This work by Dr. Mann, which is thoroughly handled as are her other studies, will clear some of the vague points on this particular subject. The book is divided into different stages, beginning with the primary optic vesicle, and then takes the development through to that of the orbit and its contents. At the end of each chapter the author deals with many abnormalities in the development of the eye.
The most interesting division from a neurologic standpoint is that which deals with the neural ectoderm. Here she traces the development of the path from the inner or nerve fiber layer of the optic cup to the brain. In this particular chapter, Dr. Mann shows the early development of Müller's fibers and proves that these supporting fibers are among the first to make