Proceedings of the Association of American Anatomists XI 



NORMAL PLATES OF THE DEVELOPMENT OF THE RABBIT. By 

 EwixG Taylor. Emhryological Laboratory, Harvard Medical School. 



The standard plates of the deveh^pment of the rabbit will form 

 one of the series of " Xormentafeln zur Entwickelungsgeschi elite der 

 AVirbeltiere *' edited by Prof. Franz Keibel of Freiburg in Breisgan. 

 The work will have three plates. Two of these will show, on a uniform 

 magnification of five diameters, the entire series of embryos, extending 

 from the stage of the blastodermic vesicle with a circular embryonic 

 shield up to the twenty day condition. The third plate will show the 

 young stages up to and including the ten and a half day embryo on a 

 magnification of twenty or ten diameters. A description of the embryos 

 corresponding to the figures on the plates, will constitute the text of the 

 JSTormentafeln. A tabulation of the internal development of the rabbit, 

 based on a study of the serial sections, will be included in the work. 

 Three series, cut in three different planes, but measuring approximately 

 the same, were studied for each period of development, except in the 

 younger stages of eight and a half days and under. The specimens 

 for each period were obtained, except as otherwise noted, by selection 

 from several litters of the same age. The entire work is practically 

 completed, excepting the bibliography, which now contains more than 

 five hundred titles. 



THE ANATOMY OF THE INGUINAL AND FEMORAL REGIONS WITH 

 SPECIAL REFERENCE TO THE ARRANGEMENT OF THE FASCIA. 

 By ARTHrR S. Vosburgh. Department of Anatomy. Columbia Univer- 

 sity, New York City. 



The subject was presented from two standpoints : 



1st. A description of the structures, layer by layer, illustrated by 

 diagi'ams, charts and drawings. 



2nd. The same structures were shown in a series of sagittal and 

 transverse sections through the groin and proximal portion of the 

 thigh. 



(Sections and Drawings.) 



The following points were emphasized: 



1. Formation of triangular ligament from fibers derived from medial 

 pillar of opposite side. 



2. Absence of anything that can consistently be described as " Con- 

 joined tendon." The structure usually so described is a small dorsal 

 lamina of the internal oblique split off from the main muscular mass 

 by the passage of the abdominal nerves. The structure often mistaken 

 for ''■ conjoined tendon "' is tlio trnnsvcrsalis fascia forming the dorsal 



