INDEX 



[The names of species, genera, families, orders, etc., are printed 

 in Italics.] 



Abbreviation in development, 262 

 Abdomen, of crayfish, 113 



of cockroach, 155, 157 

 Abdominal pores, 204 

 Acanthias vulgaris, 203 

 Acicula, 49 



Acmcea, 84 



Acromion, 292 



Actinotrichia, 217 



Afferent branchial arteries, 225, 272 



Aloe cordis, 101, 129 



Albumen gland, 81 



Alimentary canal, of Distomum, 



3, 7 



of Earthworm, 21 



of Anodonta, 58 

 - of Helix, 76 



of cockroach, 157 



of Amphioxus, 179 



of dogfish, 218 



of mammals, 288 

 Allantoidean placenta, 304 

 Allantois, 304 



Alternation of generations, 14 

 Ametabold) 170 



Amnion, 166, 301 



Amniotic cavity, 301 



Amphicoelous vertebrae, 210 



Amphioxiis, 172 



Annelida, 45 



Annuli, 91, 94 



Anodonta cygnea, 53-68 



Antennae, 95, 100, 107, no, 117, 



123, 142, 152, 168 

 Apus cancriformis, 92-111 



glacialis, 105-106 



spitzbergensiS) 105 

 Appendages of Apus, 95 

 Appendicular skeleton, 209, 216 

 Aqueductus vestibuli, 211 

 Archenteron, 190 



313 



Archiannelida, 45 



Archigcetes, 2 



Arterial arches, of frog, 272 



of mammals, 294 

 Arteries, of crayfish, 129 



of dogfish, 225 



Arthrobranchioe, 131, 132 

 Arthropoda, 91, 150 

 Ascidia, 202 



Asymmetry in Amphioxus, 196 

 Atrial folds, 197 

 Atriopore, 175, 197 

 Atrium, 175, 181 

 Auditory capsules, 211 



nerve, 238 



organs, 124, 136, 245, 279, 286 



ossicles, 291 

 Auricle, 224 

 Axial skeleton, 209 

 Azygos nerve, 136 



vein, 296 



Basibranchial cartilage, 215 



Basihyal cartilage, 215 



Basi-occipital bone, 290 



Basipodite, 117 



Basipterygium, 216 



Basisphenoid bone, 290 



Bilateral symmetry, I 



Bile duct, 219 



Blastoccele, 48, 190, 250, 254, 256 



Blastocyst, 300 



Blastoderm, 165 



Blastopore, 38, 141, 166, 192, 247, 

 250, 254 



Blastula, 36, 190, 247 



Blood - vascular system, of earth- 

 worm, 27 



of crayfish, 129, 132 



of Amphioxus, 184 

 Botryoidal tissue, 49 



