| Preface and Instructions | 1 |
| First Day | 4 |
| Second Day | 10 |
| Third Day | 14 |
| Fourth Day | 20 |
| Fifth Day | 30 |
| Sixth Day | 36 |
| Seventh Day | 42 |
| Eighth Day | 44 |
UNIVERSITY OF CAPE TOWN.
Zoological Department.
DISSECTION OF
The Platana and the Frog
BY
J. D. F. GILCHRIST, M.A., D.Sc., Ph.D.,
Professor of Zoology in the University of Cape Town,
AND
C. von BONDE, M.A.,
Lecturer in Zoology in the University of Cape Town.
1919.
CAPE TIMES LIMITED, CAPE TOWN.
PREFACE AND INSTRUCTIONS.
Owing to the fact that some of the types of animals available forthe study of Zoology in South Africa differ from those describedin text books for students in other countries, it has beenfound necessary to draw up special directions and diagrams forlaboratory use in this country. These are now put in the moreconvenient form of a text book, which, though intended primarilyfor the use of the students of the University of Cape Town, may,it is hoped, prove useful to others engaged in the teaching andstudy of Zoology in South Africa.
The general plan of the course intended to be followed is firstan introductory study of a type of vertebrate. The Platana orClawed Toad, Xenopus lævis, is the most convenient type for this inSouth Africa and in some respects is more instructive than the Frog.
Xenopus is therefore chiefly dealt with, but Rana can also beused, the differences in this type being indicated in italics. It isrecommended that both types be studied where possible.
Only these two types are dealt with here, but may be followedby descriptions of other South African types, such as the SouthAfrican Crawfish, Dogfish, Earthworm, etc.
It is intended that the student should make drawings of his dissectionson the blank page. He should not copy the diagrams, butdraw what he actually sees, and be prepared to demonstrate theparts to the teacher.
The instruments required are a large and a small pair ofscissors, a large and a small scalpel, moderately fine forceps, aseeker, and pins.
We are indebted to Mr. W. von Bonde, M.A., for the drawingof Figs. 3-5, 7-10.