XXU LIST OF ENGRAVINGS. 



Fig. Page 



29 Striated surface of the scale of the Cyprinus alhurnus, 



(Heisinger) 1 05 



30 Ditto of the Perca Jiuviatilis, (Carus) 105 



31 Imbricated arrangement of the scales of fishes (Heisinger) . . 105 



32 Section of the bulbs of hair, magnified 106 



33 Quill of Porcupine, (F. Cuvier) 109 



34 Transverse section of the same, (id.) 109 



35 Longitudinal section of the root of ditto, (id.) 109 



36 Capsule of bulb of ditto laid open, (id.) 109 



36* Groups of vibrating cilia in action, (Farre) 116 



37 Muscle in a state of relaxation 120 



38 The same muscle contracted 120 



39 Diagram illustrating the action of obhque muscles 120 



40 Semi-penniform muscle 120 



41 Penniform muscle 120 



42 Complex muscle 120 



43 Tendon of muscle 120 



44 Trapezius muscle 120 



45 Muscular structure of the Ear-drum, (Home) 125 



46 Orbicular muscle of the Eye-lids, (Albinus) 125 



47 Muscular structure of the Iris, (Home) 125 



48 Muscular fibres of a sucking disk 125 



49 Longitudinal muscular fibres of a blood vessel . . , 127 



50 Transverse muscular fibres of ditto 127 



51 Muscular fibres of the human stomach, (Cooper) 127 



52 Muscular fibres of the Heart, (id.) 127 



53 Magnified view of a Sponge, (Grant) 136 



54 Spicula in the texture of a Sponge, (id.) 136 



55 Gemmule of a Sponge, (id.) 136 



56 Lobularia. Alcyoniujn j^elasgica, (DeterwiWe) 147 



57 Detached polype of ditto, (id.) 147 



58 Zoanthus, (Actinia sociata), (Ellis) 147 



59 HTjdra viridis, (Trembley) 147 



60 Sertularia pelasgica, (Deterville) 149 



6 1 Tubipora musica, (EUis) 149 



62 Section and polypes of ditto, magnified, (id.) 149 



63 Flustra carbasea, (id.) 149 



64 Cells of ditto, magnified, (id.) 149 



Q5 Corallium rubruni, (id. ) 150 



66 Polypes of ditto, magnified, (id.) 150 



