xviii 
Fig. Page 
72. View of Liver-Fluke 140 
73. Development of Distomum 
Hepaticum 141 
74. Sporocyst 142 
75. A Redia .. 142 
76. A Cercaria : 143 
77. Cercaria and Distomum | 143 
78. Tania Saginata 145 
79. Head of Tzenia Solium - 146 
80. Transverse Section of a Pro- 
glottis of Tania - 146 
81. Semi-diagrammatic View of a 
Single Proglottis of a Tania 147 
82. Proglottis of Tznia Saginata 147 
83. Development of Tznia Solium 147 
84. ‘‘Measly” Pork 148 
85. Ventral View of Hydatina 
Senta... I51 
86. Dissection of Female Ascaris 
Megalocephala from the 
Dorsal Side af . 152 
87. Diagrammatic Transverse Sec- 
tion of Ascaris Megalocephala 153 
88. Magnified View of ‘“‘ Trichi- 
nosed” Pork - 155 
89. Asterias Rubens 156 
go. Transverse Section of the Arm 
of Asterias Rubens 157 
gx. Median Longitudinal Section 
through the Starfish in the 
Plane of its Symmetry iy ESS 
92. Aboral Dissection of a Common 
Starfish . 159 
93. Diagram of the Water-Vascular 
System of Common Starfish 160 
94. Semi-Diagrammatic View of 
Balanoglossus from the Dorsal 
Surface .. -. 162 
gs. Anatomy of Balanoglossus « 163 
96. View of Entire Colony of 
Lophopus 167 
97: Ventral (A) and Dorsal (B) Shell 
of Waldheimia Australis .. 169 
98. A Brittlestar ‘ «172 
99. A Common Sea-urchin 173 
too. Diagram of Dorsal View of 
Echinus . i - - 1736 
ror. Echinus Microstoma |. 174 
toz, View of Interior of Bisected 
Sea-Urchin . «+ 174 
103. The Rosy Feather Star | - 175 
zoq. A Holothurian .. oat E75, 
105. Polygordius Neapolitanus + 179 
106. Transverse Section of Poly- 
gordius . 180 
107. Coronal Longitudinal | Section 
of Polygordius 180 
108. Lateral View of Front End of 
Polygordius 181 
1og. Lateral View (Left Side) of the 
Lobworm ‘ - 182 
rro. Dissection of Arenicola - 182 
111. A Magnified View of a single 
Gill-Segment of Arenicola .. 184 
Fig. 
r12. 
a ey 
. Second Dissection of Leech .. 
. Transverse Section through the 
. A Nephridium of the Leech °. 
. Magnified View of Two Conse- 
. The Common Earthworm... 
. First Dissection of the Earth- 
LIST OF ILLUSTRATIONS. 
Page 
Transverse Section of Arenicola 185 
View of Nerve-ring and Brain 
of Arenicola_ .. 187 
. Section through the Otocyst of 
Arenicola -. 188 
. A Nephridium of Arenicola .. : 189 
. The Medicinal Leech + 190 
. Ventral View of the Leech 191 
. First Dissection of Leech 192 
Leech 193 
. Dorsal View of the Anterior 
End of a Leech 
cutive Segments of the Leech 
worm 
. Second Dissection of the Earth- 
worm 
5 Transverse Section of an Earth- 
worm in the Intestinal Region 
128. A Nephridium of Lumbricus .. 202 
z29. The Norway Lobster .. + 205 
130. Lateral View of Norway 
Lobster .. Bs »» 206 
131. An Abdominal ” Segment of 
Nephrops oe ++ 207 
132. A Chela tf Nephrops se +» 209 
133. A Chelate Leg of Nephrops . 209 
134. A pee rset Leg of 
Nephrop: 209 
135. The Fi ret "Maxilipede (left) of 
Nephrop: 210 
136. The Second Maxillipede of 
Nephrops +. 210 
137, A Third Maxillipede of 
Nephrops 210 
138. A, First Maxilla, “and B, Second 
Maxilla of Nephrops.. 21 
139. The Antennule of Nephrops .. 212 
140. The Mandible of Nephrops .. 212 
141. Left Antenna of Nephrops 212 
142. The First Pair of Swimmerets 
f in Nephrops ae 2ES 
143. The 2nd Swimmeret of 
Nephrops as ee ++ 213 
x44. A Typical Swimmeret of 
Nephrops 213 
. Section across the Abdomen of 
. Lateral View of ‘Nephrops 
. The Common Cockroach a 
. The Mouth Appendages of the 
. Transverse Section of Blatta | 
. Lateral 
. A Median Sagittal Section 
through Nephrops .. 214 
Nephrops 
Common Cockroach 
. Dissection of Cockroach from 
the Dorsal Side 226 
View of Peripatus 
Capensis 5‘ 
