LIST OF ILLUSTRATIONS 
. Human Ear MoDELED AND DRAWN BY MR. WOOLNER . 
. FOETUS OF AN ORANG. : B. oes 
. VESTIGIAL CHARACTERS OF HUMAN Eas j 
. Harr TRACTS ON THE ARMS AND Hanps oF Man. 2 
. Morar TEETH OF LOWER JAW IN GORILLA, ORANG, AND Man 
. PERFORATIONS OF THE HUMERUS IN THREE SPECIES OF Quap- 
RUMANA . 
. First STAGES IN THE EMBRYONIC Game OF THE PonpD 
SNAIL, Lymnaeus 
. STAGES IN THE DEVELOPMENT OF THE PRAwn, Peneus potimirium 
. LaTER STAGES IN THE DEVELOPMENT OF THE Prawn, Peneus 
potimirium 
. METAMORPHOSIS OF A BARNACLE, Eefoe 
. EMBRYOS IN CORRESPONDING STAGE OF DEVELOPMENT OF 
SHARK, FowL, AND MAN 
. THREE AQUATIC TYPES OF VERTEBRATE, TO ILLUSTRATE Con- 
VERGENT ADAPTATION . 
. Fierasfer acus, PENETRATING THE ANAL Opened oF Hoto- 
THURIANS . 
. Kallima, THE ee Suen 
. DIAGRAM OF A CELL, SHow1Nnc VarRtous Parts ea 
. DIAGRAM SHOWING REPRESENTATIVE STAGES IN MITOTIC oR 
INDIRECT CELL-DIVISION . 
. Germ CELL SET APART IN THE ieee Since OF CLEAV- 
AGE IN Miastor americana . 
. CHROMOSOMES OF THE Mosquito AND OF THE Fruit FLy 
. DIAGRAM TO ILLUSTRATE SPERMATOGENESIS 
. DIAGRAM TO ILLUSTRATE OOGENESIS a ae 
. DIAGRAM SHOWING THE PARALLEL BETWEEN MATURATION OF 
THE SPERM CELL AND MATURATION OF THE Ovum . 
. DIAGRAM TO ILLUSTRATE FERTILIZATION a a 
. VARIATION IN Sedum canine Due To DIFFERENCES IN COLOR 
or LicHt . 
. TEMPERATURE PHASES OF THE rida uicccm meeeEy 
. MorpHoLocicaL Cycle or HEAD HeEIcuT In Hyalodaphnia. 
. SCHEMATIC CuRvES OF HEAD HeEicuT 1n Hyalodaphnia as 
GROWN IN MEprIA OF THREE DIFFERENT Foop VALUES 
. CLIMATIC EFFECTS UPON PLUMAGE IN PIGEONS 
. EFFEcTS OF INJECTIONS INTO Ovary OF Scrophularia. 
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