AUTHOB S ABSTBACT OF THIS PAPER ISSUED 

 BY THE BIBLIOGRAPHIC SERVICE, SEPTEMBER 26 



THE STRUCTURE AND DEVELOPMENT OF THE 

 INTEGUMENTAL GLANDS OF THE CROCODILIA 



A. iM. REESE 



Zoological Laboratory of the University of West Virginia 



SIX PLATES (forty-three FIGURES) 



MATERIAL 



The greater part of the material upon which the embryological 

 portion of this paper was done was collected by the author some 

 years ago in Georgia and Florida, under a research grant from 

 the Smithsonian Institution; several other papers have al- 

 ready been published with this material as the foundation. The 

 caiman material here used was collected by the author in British 

 Guiana during the summer of 1919, under a grant from the 

 Carnegie Institution of Washington; the species of caiman that 

 laid the eggs could not be determined. 



The embryos were fixed in various ways (in sublimate-acetic 

 more than in any other fluid), were stained mostly with borax 

 carmine and Lyons blue, and were cut transversely, sagit tally, 

 and frontally. 



The structures to be described are the dorsal glands and the 

 musk glands. 



THE DORSAL GLANDS 



The dorsal glands of the alligator extend from the cloacal 

 region to about the midcervical region. As seen in figure 1, 

 they lie beneath the anteromesial corner of the second row of 

 scales from the middorsal line. When a piece of the skin of a 

 young animal, preserved in fluid, is viewed by transmitted 

 light, the glands appear in the form of circular areas, as seen in 

 figure 1, which represents two rows of dorsal scales from the 

 back of a 200-mm. alUgator, in the region of the pelvic legs. 



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JOURNAL OF MORPHOLOGY, VOL. 35, NO. 3 



