XX 



LIST OF ENGRAVINGS. 



Fig. 



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



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



37 Muscle in a state of relaxation 



38 The same muscle contracted . 



39 Diagram illustrating the action of oblique muscles 



40 Semi-penniform muscle 



41 Penniform muscle .... 



42 Complex muscle .... 



43 Tendon of muscle . . 



44 Trapezius muscle .... 



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



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



47 Muscular structure of the Iris, (Home) 



48 Muscular fibres of a sucking disk 



49 Longitudinal muscular fibres of a blood vessel 



50 Transverse muscular fibres of ditto 



51 Muscular fibres of the human stomach, (Cooper) 



52 Muscular fibres of the heart, (id.) 



53 Magnified view of a Sponge, (Grant) 



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



55 Gemmule of a AS|po?2^e, (id.) 



56 Lobularia. Alcyonium pelasgica, (Deterville) 



57 Detached polype of ditto, (id.) 



58 Zoanthus, (Actinia sociata,) (Ellis) 

 .59 Hydra viridis, (Trembley) 



60 Sertularia pelasgica, (Deterville) 



61 Tuhipora musica, (Ellis) . 



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



63 Flustra carbasea, (id.) 



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



65 Corallium ruhriim, (id.) . 



66 Polypes of ditto, magnified, (id.) 



67 Section of Gorgonia Briareus, (id.) 



68 Isis hippuris, (id.) . 



69 Polype of Flustra carbasea, (Grant) 



70 Tentaculum of ditto, magnified, (id.) . 



71 Pennatula phosphor ea, (Ellis) 



72 Magnified view of the polypes of ditto, (id.) 



73 to 76 mode of progression of the Hydra viridis, (Trembley) 



77 Vorticella cyathina, (Muller) . 



78 Proteus dijjiuens, (id.) 



79 Volwx globator, (id.) 



80 Brachionus urceolaris, (id.) 



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