326 



THE EVOLUTION OF MAN. 



ALPHABETICAL LIST 



Of the Meaning of the Letters in Plates IV. and V, 



N.B. — The skin-sensory layer is indicated by orange, the skin-fibrocB 

 layer by blue, the intestinal-fibrous layer by red, and the intestinal-glandular 

 layer by green. 



a, 



anal opening 



m x — m s , the five brain. bladders 



ah, 



amnion-cavity 



m Xi 



fore-brain 



al, 



allantois (urine sao) 



m 2 , 



twixt -brain 



am, 



amnion 



m 3 , 



mid-brain 



h, 



ventral muscles 



m 4 , 



hind-brain 



bb, 



breast-bone (sternum) 



™ 5 , 



after-brain 



c, 



body-cavity (cceloma) 



m 6 , 



spinal cord (medulla spinalis) 



<v 



breast -cavity (cavitas pleurce) 



md, 



milk-glands (mammae) 



C n> 



ventral cavity (cavitas peritonei) 



1*9, 



stomach 



ch, 



notochord (chorda) 



mh, 



mouth-cavity 



d, 



intestinal tube (tractus) 



mp, 



muscle-plate (muscularis) 



dc, 



large intestine (colon) 



«> 



principal veins 



dd, 



small intestine (ileum) 



o, 



mouth-opening (osculum) 



ds, 



yelk-sac (navel-vesicle) 



P, 



ventral salivary gland (pancreas) 



e, 



embryo or germ 



q, 



organ of sense 



U 



matrix (uterus) 



r, 



muscles of the back 



9, 



mesentery (mesenterium) 



rp, 



ribs (costce) 



h, 



horn-plate (ceratina) 



s, 



skull (cranium) 



hb, 



urinary vesicle (vesica urince) 



sb, 



os pubis 



hk, 



ventricle of heart 



ah, 



throat-cavity (pharynx) 



hi, 



left (arterial) heart 



9T, 



gullet (oesophagus) 



hr, 



right (venous) heart 



*, 



aorta (main artery) 



hv, 



auricle (atrium) 



u, 



primitive kidney (proton ephron) 



hz, 



heart (cor) 



uw, 



embryonic vertebra (metameron) 



h 



gall-bladder (vesica felled) 



v, 



intestinal vein (primitive vein) 



h, 



germ-glands (sexual glands) 



vg, 



vagina 



fcs, 



gill-openings (throat-openings) 



w, 



vertebra 



I, 



leather-plate (corium) 



wb, 



vertebral arches 



lb, 



liver (hepar) 



wk, 



vertebral bodies 



lr, 



windpipe (trachea) 



X, 



legs, or limbs 



lu, 



lung (pulmo) 



y, 



space between the amnion and 



m, 



medullary tube (tubus medul- 





the yelk-sac 





laria) 



*, 



midriff (diaphragma) 



