AUTHOR’S ABSTRACT OF THIS PAPER ISSUED 
BY THE BIBLIOGRAPHIC SERVICE, DECEMBER 28 
THE DEVELOPMENT OF THE ANTERIOR LYMPHATICS 
AND LYMPH HEARTS IN ANURAN EMBRYOS! 
OTTO F. KAMPMEIER 
Department of Anatomy, College of Medicine, University of Illinois, Chicago 
THIRTY-FIVE FIGURES INCLUDING EIGHT COLORED PLATES” 
THE LYMPHATIC GROUND-PLAN OF THE TADPOLE 
As is well known, the vessels which collect the lymphatic fluid 
and convey it to the lymph hearts and thus to the veins in the 
fully developed anuran Amphibia are in the form of extensive 
subcutaneous sacs and deep sinuses. This condition, however, 
is a relatively late acquisition in development, appearing during 
the metamorphosis of the individual. Before this period, the 
lymphatic conduit system consists of narrower ducts and capil- 
lary networks, similar to those found in the higher vertebrates. 
In fact, we can recongnize three periods in the development of 
the lymph channels in Anura: firstly, the initial formative period, 
secondly, a phase of specific ducts and plexuses, and, thirdly, 
the final condition, characterized by broad lymph sacs and sin- 
uses—periods which in a general way coincide with the three 
into which we arbitrarily divide the embryogeny of frog and toad, 
namely, early embryonic, larval or tadpole, and metamorphic 
phases. To follow intelligently the nature of events which occur 
during the formation of the anuran lymphatic system fromits 
inception to its final configuration, as well as to emphasize par- 
ticular components and to propose a terminology which will facili- 
tate comparison with other vertebrates, it seems expedient to 
1The present communication represents a portion of a monograph intended 
for publication in 1918. Other papers which will follow complete the subject- 
matter of this monograph. The reason why it was broken into a number of 
separate parts is explained in a footnote of the first installment which appeared 
in The Anatomical Record, vol. 19, July, 1920. 
2 The cost of illustrations in part borne by the Anatomical Laboratories. 
61 
