326 



THE EVOLUTION OF MAN. 



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ALPHABETICAL LIST 



Of the Meaning of the Letters in Flates IV. and V. ^ 



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

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

 layer by green. 



a, anal opening 



ah, amnion-cavity 



al, allantois (urine sac) 



am, amnion 



h, ventral muscles 



hh, breast-bone (stermim) 



c, body-cavity (ccBloma) 



c,, breast-cavity (^cavitas pleura:) 



c^^, ventral cavity (cavitas peritonei) 



ch, notochord {chorda) 



d, intestinal tube (tractus) 



dc, large intestine (coZojr) 



dd, small intestine (ileum) 

 dSf yelk-sac (navel. vesicle) 



e, embryo or germ 

 /, matrix (litems) 



g, mesentery (mesenterium) 



h, horn-plate (ceratind) 



hh, urinary vesicle (vesica urince) 



hk, ventricle of heart 



hi, left (arterial) heart 



hr, right (venous) heart 



hv, auricle (atrium) 



hz, heart (cor) 



i, gall-bladder (vesica fellea) 



Ic, germ-glands (sexual glands) 



Ics, gill-openings (throat-openings) 



I, leather-plate {cerium') 



Ih, liver (hepar) 



Ir, windpipe (trachea) 



In, lung (pulmo) 



m, medullary tube {tuhus medul- 

 laris) 



Wi — m^, the five brain-bladders 



wij, fore-brain 



TO2, twixt-brain 



rjis, mid-brain 



?n4, hind-brain 



VI 5, after-brain 



vIq, spinal cord (medulla spinalis) 



md, milk-glands (mammce) 



mg, stomach 



mh, mouth-cavity 



mp, muscle-plate (muscularis) 



V, principal veins 



0, mouth-opening (osculum) 



ventral salivary gland (pancreas) 



organ of sense 



muscles of the back 



ribs (costoe) 



skull (cranium) 



OS puhis 



throat -cavity (pharynx) 



gullet ((esophagus) 



aorta (main artery) 



primitive kidney {proton ephron) 



embryonic vertebra (metameron) 



intestinal vein (primitive vein) 



vagina 



vertebra 



vertebral arches 



vertebral bodies 



legs, or limbs 



space between the amnion and 

 the yelk-sac 

 z, midi-iff (diaphragma) 



g» 



r, 

 rp, 



s, 

 sh, 

 sh, 

 sr, 



t, 

 u, 



UIV, 



vg, 

 w, 

 ivh, 

 ■u-k, 



X, 



