1897

Oxford

HORACE HART, PRINTER TO THE UNIVERSITY

CONTENTS

PAGE
CHAPTER I.
The Pocket Lens, the Dissecting Microscope, andsome simple Appliances[11]
CHAPTER II.
Arthropods and their Classes.—The MarginedWater Beetle; the Great Water Beetle; theCocktail Beetle[27]
CHAPTER III.
Cockroaches; Earwigs; the Great Green Grasshopper;the Water Scorpion; the Water Boatman; Corixa[63]
CHAPTER IV.
Spiders, Mites, and Myriapods[96]
CHAPTER V.
Crustaceans.—Prawn, Shrimp, Mysis, Crabs; Amphipods; Isopods[128]
CHAPTER VI.
Aquatic Insect Larvae[157]
Index[189]

LIST OF ILLUSTRATIONS

FIG.PAGE
Ptychoptera paludosa. Limnobia replicata[Frontispiece]
1.Hand Magnifier and Stand[14]
2.Zeiss’s Dissecting Microscope[16]
3.Leitz’s Dissecting Microscope[17]
4.Two Leitz Lenses in holder (open)[18]
5.Two Leitz Lenses in holder (closed)[18]
6.Home-made Dissecting Microscope[19]
7.Beakers[21]
8.Glass Capsule[21]
9.Glass Block, with cover[22]
10.Glass Box, with cover[22]
11.Forceps[23]
12.Three forms of Dipping-tube. Method of using it[24]
13.Mounted Needles[25]
14.Cape Peripatus (natural size)[30]
15.Margined Water Beetle (male)[32]
16.Shells of Molluscs broken up by Dytiscus[33]
17.Outline of Dytiscus[38]
18.Male Dytiscus in flight[39]
19.To show fold of (right) wing of Dytiscus[40]
20.To show fold of (right) wing of Dytiscus[40]
21 and 21 A.Head of Dytiscus[42]
22.Disposition of mouth parts[43]
23.Leg of Cockroach[44]
24.Tarsus of Dytiscus (magnified)[45]
25.Female Dytiscus swimming[46]
26.Upper surface of abdomen of typical Beetle[47]
27.Spiracle of Dytiscus (magnified)[48]
28.Tracheal tubes of Dytiscus (magnified)[48]
29.Great Water Beetle[51]
30.Female Hydrophilus constructing a cocoon. (After Lyonnet)[55]
31.Cocktail Beetle[58]
32.Cockroaches[66]
33.Mouth parts of a Cockroach[69]
34.Cockroach, showing Spiracles[71]
35.Alimentary Canal of Cockroach[73]
36.American Cockroach (male)[75]
37.Larva and Pupa of Earwig[77]
38.Earwig (male)[78]
39.Great Green Grasshopper (female)[81]
40.Tibial ear of Great Green Grasshopper[85]
41.Land Bug (magnified)[86]
42.Water Scorpion[87]
43.Organs of Water Scorpion, Egg, and Parasitic Mite. (After Swammerdam)[90]
44.Raptorial leg of Water Scorpion[92]
45.Water Boatman[93]
46.Water Boatman swimming[94]
47.Corixa, with wings expanded[95]
48.Scheme of under surface of Wolf Spider (female). Pedipalp of male (enlarged)[98]
49.Garden Spider and Web[99]
50.Threads of Spider’s Web[100]
51.Anchorage of Web[101]
52.Foot of Garden Spider[104]
53.Spinnerets of Garden Spider[104]
54.Jumping Spider[106]
55.Falces of Male Jumping Spider[106]
56.Foot of Jumping Spider. Scopula much enlarged[108]
57.Diving Spiders[109]
58.Cell of Diving Spider[112]
59.Red Water Mite[114]
60.Larva of Water Mite[117]
61.Nymph of Water Mite[117]
62.Beetle Mite[119]
63.Lithobius forficatus. Mouth parts seen from below. (After Graber)[124]
64.The Common Millepede[126]
65.Segments of Millepede (magnified)[127]
66.Prawn[132]
67.First walking leg of Shrimp (enlarged)[134]
68.Mysis, or the Opossum Shrimp[135]
69.Maxillipedes and Maxilla of Shore Crab. (After Savigny)[138]
70.Stomach of Crab laid open[139]
71.Gammarus. (After Sars)[142]
72.Maxillipedes of Gammarus marinus (magnified)[146]
73.Nest-building Amphipod (from life)[148]
74.Water Woodlouse[153]
75.Mouth-lock. (After Burgess)[161]
76.Dytiscus Larvae[162]
77.Pupa of Dytiscus[164]
78.Larva of Limnobia replicata[167]
79.Forked spine of Limnobia (enlarged)[168]
80.Pupa case of Limnobia[169]
81.Fore wing of Bee, showing marginal fold (×7)[170]
82.Larva of Paraponyx stratiotata (enlarged)[173]
83.Diagram of segment of Paraponyx, showing arrangement of tracheal gills[175]
84.Gill of Paraponyx larva. (After De Geer)[176]
85.Larva of Sialis (enlarged)[179]
86.Diagram of Sialis larva, showing arrangement of gills[181]
87.Pupa of Sialis[181]
88.Larvae of Ptychoptera paludosa (from life)[184]
89.Ptychoptera Larva (enlarged). Tail. (After Lyonnet)[186]
90.Pupa of Ptychoptera. (After Lyonnet)[187]

THROUGH A POCKET LENS

CHAPTER I
THE POCKET LENS, THE DISSECTING MICROSCOPE, AND SOME SIMPLE APPLIANCES