LIST OF ILLUSTRATIONS. 



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View of Liver-Fluke . . 



Development of Distomum 

 Hepaticum 



Sporocyst 



A Redia 



A Cercaria 



Cercaria and Distomum 



Taenia Saginata 



Head of Taenia Solium 



Transverse Section of a Pro- 

 glottis of Taenia 



Semi-diagrammatic View of a 

 Single Proglottis of a" Taenia 



Proglottis of Taenia Saginata 



Development of Taenia Solium 



"Measly "Pork 



Ventral View of Hydatina 

 Senta .. .. .. .. 151 



Dissection of Female Ascaris 

 Megalocephala from the 

 Dorsal Side .. .. .. 152 



Diagrammatic Transverse Sec- 

 tion of Ascaris Megalocephala 153 



Magnified View of " Trichi- 

 nosed " Pork . . . . . , 155 



Asterias Rubens .. .. 156 



Transverse Section of the Arm 

 of Asterias Rubens . . . . 157 



Median Longitudinal Section 

 through the Starfish in the 

 Plane of its Symmetry 



Aboral Dissection of a Common 

 Starfish . . 



Diagram of the Water- Vascular 

 System of Common Starfish 



Semi-Diagrammatic View of 

 Balanoglossus from the Dorsal 

 Surface . . . . . . . . 162 



Anatomy of Balanoglossus . . 163 



View of Entire Colony of 

 Lophopus . . . . . . 167 



Ventral (A) and Dorsal (B) Shell 

 of Waldheimia Australis . . 169 



A Brittlestar . . . . . . 172 



A Common Sea-urchin . . 173 



Diagram of Dorsal View of 

 Echinus . . . . . . . . 173 



Echinus Microstoma .. ••174 



View of Interior of Bisected 

 Sea-Urchin .. .. ••174 



The Rosy Feather Star .. 175 



A Holothurian .. ^ .. ••175 



Polygordius Neapolitanus .. 179 



Transverse Section of Poly- 

 gordius . . . . . . _ .. 180 



Coronal Longitudinal Section 

 of Polygordius . . . . 180 



Lateral View of Front End of 

 Polygordius .. .. ..181 



Lateral View (Left Side) of the 

 Lobworm .. .. .. 182 



Dissection of Arenicola .. 182 



A Magnified View of a single 

 Gill-Segment of Arenicola . . 184 



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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 



The Medicinal Leech . . 



Ventral View of the Leech 



First Dissection of Leech 



Second Dissection of Leech 



Transverse Section through the 

 Leech 



Dorsal View of the Anterior 

 End of a Leech 



A Nephridium of the Leech . . 



Magnified View of Two Conse- 

 cutive Segments of the Leech 195 



The Common Earthworm . . 198 



First Dissection of the Earth- 

 worm . . . . . . . . 200 



Second Dissection of the Earth- 

 worm . . . . . . . . 200 



Transverse Section of an Earth- 

 worm in the Litestinal Region 



A Nephridium of Lumbricus . . 



The Norway Lobster . . 



Lateral View of Norway 

 Lobster . . 



31. An Abdominal Segment of 



Nephrops 



32. A Chela of Nephrops . . 



33. A Chelate Leg of Nephrops . 



34. A Non-Chelate Leg of 



Nephrops 

 35 The First Maxillipede (left) of 

 Nephrops 



36. The Second Maxillipede of 



Nephrops 



37. A Third Maxillipede of 



Nephrops . . - . . 



38. A, First Maxilla, and B, Second 



Maxilla of Nephrops. . 



39. The Antennule of Nephrops . . 



40. The Mandible of Nephrops , . 



41. Left Antenna of Nephrops . . 



42. The First Pair of Swimmerets 



in Nephrops 



43. The 2nd Swimmeret of 



Nephrops 



44. A Typical Swimmeret of 



Nephrops 



45. A Median Sagittal Section 



through Nephrops . . 



46. Section across the Abdomen of 



Nephrops 



47. Lateral View of Nephrops . . 



48. The Common Cockroach 



49. The Mouth Appendages of the 



Common Cockroach . . . . 224 



50. Dissection of Cockroach from 



the Dorsal Side . . . . 226 



51. Transverse Section of Blatta . . 228 



52. Lateral View of Peripatus 



Capensis .. .. .. 231 



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