INDEX OF SUBJECTS 



Note. — References give the number of the page on which the term is first defined 

 or on which the consideration of the subject begins. Sometimes, when the topic occu- 

 pies several pages, the first and last pages are given. When a term is used a great many 

 times or when a species is referred to repeatedly throughout the book, only some of 

 the more important references are given. 



Amnion: amniotic connecting 

 canals, 52, 65; common amnion 

 in Dasypus, 51-57; origin of, in 

 Das y pus, 46. 



Annadillo: armor of, 27; corpus 

 luteum of, 32; food of, 29; 

 habits of, 28; hairy armadillo 

 (see Peludo), 77-83; mating of, 

 29; Miilita armadillo, 69-77; 

 nine-banded armadillo of Texas, 

 27; ovaries of, 32; ovogenesis 

 of, 32; quadruplets, 16, 24; 

 uterus of, 30. 



Atretic follicles, 30, 35. 



Bilateral: development, 5; divi- 

 sion, 5; doubling, 5; struc- 

 tures, 5. 



Blastocyst, i. See also Egg. 



Blastodermic vesicle, i, 12, 38. 

 See also Egg. 



Blastotomy, 91. 



Chromosomes in Dasypus, 36. 

 Corpus luteum (corpora lutea), 11, 



32. 

 Cosmohia, 19-21. 

 Co-twin, 6. 

 Cyclopic: eyes, 5; monsters, 5. 



Dasypus: gymnurus, 83; hybridus, 

 25, 118; novcmclnclus, 2, 6, 25, 

 118; sexcinclus, 83. 



Dasyurus, 34, 36, 37, 42. 



Deutoplasm: extrusion in arma- 

 dillo egg, 35; zone, 33. 



Diplopagi, 18, 23. 

 Diplotrophoblast, 45, 53. 

 Discus proligerus, 33. 

 Dizygotic, 3. 



Egg: binucleated, 16; eutherian, 

 40; use of word as equivalent of 

 blastocyst, etc., i. 



Embr>'ology : of Dasypus hybridus, 

 69-77; of D. novcmcinctus, 39- 

 67; of Euphractus villosus, 77- 

 83; of man, 17, 23. 



Embryos: earliest of Dasypus, 40; 

 number of in D. , hybridus, 69; 

 of ferret, 92; of Lupus, 92; 

 of mouse, 42, 92; of sheep, 92; 

 orientation of in uterus of 

 Dasypus, 61; pairing of in 

 Dasypus, 58; primary cmbr>os 

 in Dasypus, 47; rudimcntar>' in 

 D. hybridus, 75, 76; secondary 

 embryos in Dasypus, 49. 



Euphractus villosus, 3, 6, 77-83, 

 108, 118. 



Extra-embryonic cavity, 44. 46, 



47- 



Fertilization of Dasypus novcm- 

 cinctus, 36, 37. 



Formative zone, ^s. 



Freemartin: blood admixture in. 

 104; fertile, 96; hormone the- 

 ory of origin of, 104. 



Gastrulation in armadillo egg, 

 40-42. 



183 



