XIV CONTENTS. 



BICTtO* 



9. Organs of Secretion 255-266 



L Urinary Organs, 255 



n. Organs of Special Secretions, 256 



10. Organs of Generation, 257-261 



Introductory JVote to the Crustacea. 

 XH. THE CRUSTACEA. 



Classification and Bibliography, 262 



1. External Envelope, and Cutaneous Skeleton 263-266 



2. Muscular System, and Organs of Locomotion, 267-269 



a Nervous System, 270-273 



4. Organs of Sense, 274-277 



6. Digestive Apparatus, 278-281 



6. Circulatory System, 282-284 



7. Respiratory System 285-287 



g. Organs of Secretion, 288-289 



J. urinary Organs 288 



11. Organs of Special Secretions, 289 



:9. Organs of Generation, 290-294 



I. ilermaphrodite Crustacea, 291 



II. Female Crustacea, 292 



III. Male Crustacea, 293 



Xlir. THE ARACHNOIDAE. 



Classification and Bibliography, 295 



1. External Envelope, and Cutaneous Skeleton, 296-397 



■2. Muscular System, and Org.ans of Locomotion, 298-299 



3. Nervous System, 300-302 



4. Organs of Sense, 303-305 



Ö. Digestive Apparatus, 306-308 



6. Circulatory System 309-310 



7. Respiratory System, 311-313 



8. Organs of Secretion, 314-315 



I. Urinary Orgms, 311 



II. Oi'g.uis of S|iecial Secretions, 315 



9. Organs of Generation, 316-320 



I. Hermaphrodite Arachnoidae, 317 



II. Female Arachnoidae 318 



III. M.ile Arachnoidae, 319 



XIV. THE INSECTA. 



Classification and Bibliography, 321 



1. External I'nvelope, and Cutaneous Skeleton, 322-323 



2, Muscular System, and Locomotive and Soniferous Organs, 325-327 



8. Nervous System 328-331 



4. Organs of Sense 332-336 



5. Digestive Apparatus, 337-339 



6. Circulatory System, 340 



7. Respiratory System, 341-344 



8. Organs of Secretion, 345-347 



I. Urinary Organs, 345-346 



II. Organs of Special Secretions, 347 



9. Organs of Generation, 348-355 



I. Female Genital Organs, 349-351 



II. Male Genital Organs, 352-354 



Index 



