528 THE ORIGIN OF VERTEBRATES 



Limulus appendages, prosomatic, 381 



„ brain, 54 



,, circulation, 174, 176 



„ classification, 26, 249 



,, ccelomic cavities, 252, 328 



„ coxal glands, 321, 389, 397, 403, 429 



,, eyes, median, 62, 74, 81 



,, entosternite or plastron, 142, 143 



„ flabellum, 360, 362, 363, 380, 381 



,, generative organs and ducts, 189, 202, 208, 209, 380 



,,. heart, 180 



,, musculature, branchial, 170 



,, „ prosomatic, 247 



„ veno-pericardial, 177, 297, 309, 313 



,, nerves, appendage, 140, 157 



,, ,, cardiac, 314 



,, ,, segmental, tripartite division of, 157, 235, 267, 355 



,, segments, branchial, 152 



,, ,, first mesosomatic, 188 



,, ,, prosomatic, 233 



„ operculum, 189, 202, 235, 295 



,, sense-organs, poriferous, of appendages, 359 

 Lip, lower, of Ammoccetes, 246, 289, 297, 458 

 „ upper, „ 228, 243, 303, 336 



Liver, Ammoccetes, 452 

 „ Limulus, 209, 211 

 Lizard, pineal eye, 80 

 ,, suprarenals, 424 

 ,, tail, 50 

 Lobes, optic, 101 

 Lobster, 489 

 Lungs, 148 



Lung-books of scorpions, 150 

 Lymph, 474 



Lymph-corpuscles, 463, 490 

 Lymphocytes, 472 



Malapterueus, 470 



Mammal, dominance of, 21 



Man, dominance of, 17 



Marsipobranchs, 23, 35 



Medullation of nerve-fibres, 20, 267, 467, 477. 



Membranes, basement, 436 



Meroblastic egg, 485 



Merostomata, 25, 249, 321 



Mesencepalon, 48 



Mesoblast, 444, 455, 459 



Mesoglcea, 474 



Mesonephros, 389, 400, 424, 429 



Mesosoma, 52 



Mesotheliurn, 472, 477 



Metanephros, 389 



