CONTENTS. 



Echinodermata (continued). Page 



Sea-baskets 50 



Snake-tailed Star-Fishes 51 



" Brittle-stars" 51 



Star-Fishes 52 



Cake-Urchins 53 



Sea-Eggs 53 



Their mode of climbing 54 



Complicated structure of Shell 54 



Sea-Cucumbers 54 



The Cotton-Spinner 5, 



Siphon-Worms 5^ 



Sipunculus Bernhardus 55 



CHAPTER VIII. 



PARASITIC WORMS. EXTOZOA -<"> 



Hydatid -6 



Tape-Worms 56 



Flukes 56 



Guinea-Worm 57 



Hair- Worm 57 



Turbellaria 57 



Planarias 57 



Long Sea-Worms 58 



CHAPTER IX. 



SECOND DIVISION OF INVERTEBRATE ANIMALS. 



ARTICULATED ANIMALS 59 



Includes Creatures existing under great 



diversity of circumstances 59 



Their external conformation the most 



obvious character of distinction 59 



Worms 59 



Centipedes 5; 



Insects 59 



Scorpions, Spiders, &c 60 



Crabs, Lobsters, &c 61 



FIRST CLASS OF ARTICULATED ANIMALS... 63 



WORMS. ANNELIDA 63 



Divided into three Orders 64 



Abranchia 64 



Dorsibranchiata 64 



Tubicola 64 



First Order 



Abranchiate Animals 64 



Divided into two Families 64 



Setigera and Suctoria 64 



Earth-Worms 64 



Their importance in the economy of 



Nature 



Naides ............................................. 65 



Leeches ............................................. 65 



Medicinal Leech ................................. 65 



Second Order 



Dorsibranchiate Annelidar.s .................. 66 



Their splendid appearance .................. 66 



Their variety of Weapons .................. 68 



Sand-Worm ....................................... 69 



Nereids ............................................. 70 



Singular structure of Mouth ............... 70 



Erroneous notions concerning Worms ... 70 



The Sea-Mouse ................................. 70 



Third Order 



Tubicolous Annelidans ........................ 71 



Serpulse ............................................. 72 



Shells of Serpulae .............................. 72 



Singular Trap-door ........................... 72 



Annelida (continued). Pas's 



Terebellae 72 



Construction of their Residencs 72 



Sabella alveolaris 72 



CHAPTER X. 

 SECOND CLASS OF ARTICULATED ANIMALS. 



CENTIPEDES. MYRIAPODA 72 



Intermediate between red-blooded Worms 



and Insects 73 



Structure of Myriapods 74 



Myriapoda remarkably distinguished 



from Insects properly so-called 74 



Two Families belong to the Class 74 



Millepedes and Centipedes 74 



Millepedes, how distinguished 71 



Their habits 74 



Centipedes 74 



Their formidable Mouth 75 



Giant Scolopendra 75 



Forked Centipede 75 



Electric Scolopendra 75 



CHAPTER XI. 

 THIRD CLASS OF ARTICULATED ANIMALS. 



INSECTS 7=; 



How to study Insects 77 



What is an Insect 77 



Three principal portions of Body 77 



Divisions of Leg of Insect 77 



Wings of Insect 78 



Diversity in construction in instruments 



for procuring nourishment 79 



Mouths of Insects divided into two 



Classes 79 



Their formation 79 



Organs of Sense in Insects 81 



Eyes of Insects 81 



Respiratory System of Insects 82 



Admirable contrivance for preserving the 



flexibility of their Air-tube-. 83 



Extraordinary strength of Insects 84 



No Insect in its winged condition per- 

 mitted to grow 85 



Metamorphosis of Insects 85 



SHIELD-WINGED INSECTS. ORDER Couc- 



OPTERA 88 



Characteristics of Coleopterous Insects.. 88 

 Divided into four Sections, according to 



number of joints in Feet 88 



First Section. PENTAMRRANS 88 



Tiger Beetles, their rapacity, beauty, 



and activity 89 



Dens of Larvae 89 



Ground Beetles, their habits 89 



Bombardiers 89 



The work intrusted to the Cannvora 



essential to the well-being of Nature.. 90 



Water-Beetles 90 



Their predatory excursions 90 



Their Larvae " Water-Tigers" go 



Equally active and ferocious 91 



Insect Scavengers 92 



Brachelytrous Pentamerans 92 



Rove-Beetles 92 



Serricornes, how distinguished 92 



