SCHEME OF THE CLASSIFICATION 



XXI 



PHYLUM IX. MOLLUSC A 243 



Class I. AMPHINEURA . 

 Order i . POLYPLACO- 



PHORA 



" 2. APLACOPHORA 

 Class II. GASTROPODA . 

 Subclass I. Streptoneura 

 Order i . ASPIDOBRAN- 

 CHIA . . 

 " 2. PECTINIBRAN- 



CHIA . . 



Subclass II. Euthyneura . 

 Order i . OPISTHOBRAN- 

 CHIA . . 



PAGE 

 2 5 I 



2 5 I 

 252 

 252 

 2 5 8 



2 5 8 



Order 2. PULMONATA . 258 



Class III. SCAPHOPODA . . 261 



Class IV. PELECYPODA . .261 

 * Order i . PROTOBRAN- 



CHIA . . . 262 



'" 2. FlLIBRANCHIA . 262 



*' 3- EULAMELLI- 



BRANCHJA . 262 

 " 4. SEPTIBRANCHIA 262 



Class V. CEPHALOPODA . . 264 

 Order i . TETRABRAN- 



CHIA . . 268 



" 2. DlBRANCHIA . 268 



PHYLUM X. ARTHROPODA .... 274 



Class I. CRUSTACEA . . . 



Subclass I. Branchiopoda . 



Order i. PHYLLOPODA . 



2. CLADOCERA 

 Subclass 1 1. Ostracoda . . 



3. Copepoda. . . 

 " 4. Cirripedia 



" 5. Malacostraca 



Order i . NEBALIACEA 



" 2. ANASPIDACEA . 



" 3. MYSIDACEA . . 



" 4. CUMACEA . . 



" 5. TANAIDACEA . 



" 6. ISOPODA . . . 



" 7. AMPHIPODA 



" 8. EUPHAUSIACEA 



" 9. DECAPODA . . 



Suborder i . Natantia 



" 2. Reptantia 



" 10. STOMATOPODA . 



Class II. ONYCHOPHORA . 



Class III. MYRIAPODA 



276 Order i. PAUROPODA 



292 2. DIPLOPODA . 



292 " 3. CHILD PO DA . 



294 " 4. SYMPHYLA . 

 294 Class IV. INSECTA . . 



294 Order i. APTERA . . 



294 2. EPHEMERIDA 



294 " 3. ODONATA . 



294 " 4. PLECOPTERA 



294 " 5. ISOPTERA . 



294 " 6. CORRODENTIA 



294 " 7. MALLOPHAGA 



297 - 8. THYSANOPTERA 342 



297 '' 9. EUPLEXOPTERA 342 



297 " 10. ORTHOPTERA 



297 " ii. HEMIPTERA 



297 " 12. NEUROPTERA 



297 " 13. MECOPTERA 



297 " 14. TRICHOPTERA 



297 " 15. LEPIDOPTERA 



305 " 16. DIPTERA. . 



308 



309 

 309 

 310 

 311 

 312 

 337 

 338 

 339 

 340 

 340 



341 



341 



343 

 345 

 349 

 349 

 350 

 350 

 356 



17. SlPHONAPTERA 359 



