360 INDEX-GLOSSARY. 



Anura, 4. 



Anus (anus, in modern sense) The opening by which the undigested pro- 

 ducts are ejected from the food-canal, 14, 29, 48, 86, 94, 113, 123, 269, 

 286, 313. 



Aorta, 128, 164, 197, 227, 246, 265, 308; Anterior, 115; Cardiac, 142; 

 Dorsal, 142 ; Posterior, 115. 



Apertures, pores, &c. Abdominal p., 154; Auditory a., 89, 269; Auriculo- 

 ventricular, 162, 196, 245; Cloacal, 48, 111, 154, 175, 191, 230, 242; 

 Eustachian, 241 ; Excretory, 28, 31, 48, 55, 61, 76, 80, 89, 112 ; 

 Exhalent, 111 ; Genital, 28, 32, 62, 63, 76, 80, 87, 99, 112 ; Renal, 89, 

 112; Urinogenital, 269, 298, 299. 



Apodeme (iirJ^jj/xos, absent from home), in the Crayfish One of the elements 

 of the endophragmal system, 90. 



Aponeurosis (aTroi/ei^otoo-is, used with the modern meaning) The connective 

 tissue sheath of a muscle, 208. 



Appendages, 83, 84, 87, 89, 90, 108. 



Appendicular, of skeleton Belonging to limbs, 178, 239, 280, 326. 



Appendix, Vermiform, 286, 330. 



Apteria (a-, negative ; in-epov, a feather), in the Bird Featherless patches, 

 229. 



Aqueduct, Sylvian, 169. 



Aqueductus vestibuli, 173. 



Arachnoid (apax^X, a spider's web ; i5-El5os, IS-, appearance, 210. 



Archoplasm (PX*J> a beginning; TrXaT/ua, anything formed) The proto- 

 plasm composing the centrosoma, 73. 



Archenteron (apx ? J, the beginning ; ev-repov, an intestine) The digestive 

 cavity of the gastrula, 68, 106, 148, 224, 260, 307. 



Arch Gill a., 141; Hamal a., 158; Neural a., 158, 184. 



Arches Arterial or Aortic, 197, 246, 265, 290, 308 ; Carotid, Pulmo- 

 cutaneous, Systemic, 197. 



Arches, Visceral, in Chordata Thickenings in the wall of the pharynx 

 between which are the visceral clefts, 141, 157, 225, 227, 262, 264, 308 ; 

 Mandibular a. : The first bar of the visceral skeleton, 157, 225, 227, 

 264, 331 ; Hyoid a. : The second bar of the visceral skeleton, 157, 225, 

 227, 236, 264, 276, 331 ; Branchial a. : The third and succeeding bars 

 of the visceral skeleton, 157, 225, 227, 236, 276, 308, 331. 



Area a. opaca, in the Bird and Mammal The part of the blastoderm 

 outside the area pellucida, 257, 260 ; a. pellucida (embryonic area), in 

 the Bird and Mammal That part of the blastoderm from which the 

 body of the embryo is mainly formed, 257, 260, 307. 



Areas of distribution, 349. 



Arm, 175, 230, 269. 



