Mordacia mordax 

 Gut 

 Larva 

 Anatomy 



Intestinal juices and enzymes 



Larva 

 Ovarian cycles 

 Fecundity 

 Spermatogenesis 

 Reproductive season 

 Mordacia praecox 

 Ovarian cycles 

 Fecundity 

 Spermatogenesis 

 Sperm 



Ultrastructure 

 Caryotype 



Reproductive season 

 Petromyzon marinus 



General structure and behavior 

 Pigments 



Biochemistry 



Enzymology 

 Melanin 



Ultrastructure 

 Pigment chemistry 

 Melanin 



Developmental analysis 

 Brain 



Oxidative metabolism 

 Biochemistry 

 Larva 

 Telencephalon 

 Anatomy 

 Histology 

 Function 

 Metencephalon 

 Anatomy 

 Histology 

 Nose 



Anatomy 

 Function 

 Development 

 Narial water-moving devices 

 Narial lamellae 

 Histology 



Ultrastructure 



Chemical sensitivity and acuity 

 Sclera and cornea 

 Ultrastructure 

 Water content 

 Ultrastructure 

 Experimental analysis 

 Thyroid hormone 

 Effect on fish 

 Metamorphosis 

 Lymphatic system 

 Anatomy 

 Function 

 Development 

 Heart 



Hemodynamics 



Experimental analysis 

 Spleen 



Biochemical blood constituents 

 Serum transferrin 

 Serum proteins 

 Hemoglobin 

 Ultrastructure 



Biochemistry 

 Isoenzymes 

 Reticuloendothelial system 



Experimental analysis 

 Immunological reactions 



Biochemical blood constituents 

 Liver 



Amine oxidase 

 Enzymology 

 Biochemistry 

 Descriptive evolution 

 Bile 



Biochemistry 



Descriptive evolution 

 Rate of growth 



Energy conversion efficiency 



804518 

 804395 

 804395 

 804395 

 804395 



804395 

 804395 

 807633 



804395 

 807633 

 804395 



808641 

 808641 



803957 

 803957 



803957 



803957 

 803957 



803957 



Seasonal changes 

 Inorganics in water 

 Effect on fish 

 Developing egg 



805210 



805210 



804506 

 805642 

 808027 

 805642 

 805643 

 808027 



Distribution 



Population changes 



Age class distribution 



Larva 

 Length frequency 

 Larva 



Seasonal changes 

 Orcadian rhythms 

 Seasonal abundance 

 Spatial orientation 

 Nose 



Experimental analysis 

 Feeding 

 Nose 



Experimental analysis 

 Habitat preference 

 Anadromy 

 Effect on fish 

 Ovarian cycles 

 Testicular cycles 

 Neoplastic diseases 



Descriptive evolution 

 Stress reactions 

 Adrenaline 



Experimental analysis 

 Noradrenaline 



Experimental analysis 

 Dams and barriers 

 Fish control agents 

 Effect on fish 

 Larva 



Larva 



Experimental analysis 

 Breeding and rearing 

 Pteraspidomorpha 



General structure and behavior 



Descriptive evolution 

 Armor 

 Anatomy 

 Histology 



Descriptive evolution 

 Extinction 



Descriptive evolution 

 Bone 



Descriptive evolution 

 Cartilage 



Descriptive evolution 

 Nose 



Anatomy 

 Function 

 Development 

 Descriptive evolution 

 Narial water-moving devices 

 Anatomy 

 Function 

 Oniscolepis 

 Armor 

 Distribution 

 Cyathaspidiformes 

 Americaspis claypolei 

 List of types 



New York State Museum 

 Tolypelepis undulata 

 Silurian 

 Distribution 

 Vernonaspis vaningeni 

 Synonymy 

 List of types 



New York State Museum 

 Drepanaspidiformes 

 Tesseraspis tessellata 

 Pteraspidiformes 

 Distribution 

 Pteraspidiformes 

 Ptcraspis 



Hydrodynamics 

 Traquairaspidiformes 

 Traquairaspis 

 Armor 

 Distribution 

 Thelodontomorpha 

 Scales 

 Silurian 

 Distribution 

 Amaltheolepis 

 Scales 



806415 



Petromyzontomorp] 



805642 



(continued) 



805634 





808497 





808498 







Mordacia 



804722 



to 





Petromyzon 



804722 





803957 





808027 



Pteraspidomorpha 



803957 







Thelodontomorpha 



805966 

 805966 



806568 

 805642 



805642 

 805643 

 805581 

 807537 

 807587 



807940 

 808939 

 803863 

 806283 

 803863 

 803863 



806899 

 806899 

 806899 



804193 

 804193 



807329 

 807329 



804837 

 804837 



805713 

 804193 

 804193 



175 



