LIST OF PLATES 



1 . I'riodesmuK acits, male 57 



2-(). Species of Diplopoda from East Africa Ill 



1-H. East African Lepidoptera 279 



9. Mai> showing the distribution of pearly fresli- water mussels 343 



10. Tumbo armadillo, female 347 



11. Skull of Xenurus h ispidus 347 



12. Callinceies sapidus, male 375 



13. CaUiticfh's sapidus (iciitidens, male 375 



14. Callinectes sapidus, varying toward aciitidens. male 375 



15. ( 'aUinectes ornatus 375 



16. CaUi)i((les daua\ Smith, male 375 



17. ( 'allinrcfes larvatt<s, male 375 



18. CaUincctcs tinnidiis, male - 375 



19. ('aUinrctis bocourti ( ?), male 375 



20. ('alUnectfs arcttatus, male 375 



21. Callinectes toxotes, female 375 



22. Callinectes hellicosus, male 375 



23. Callinectes arcuatus, male, aud deformed claws of Callinectes sapidus 375 



24. Frontal outlines of Callinectes 375 



25. Abdominal outlines of Callinectes. male 375 



26. Abdominal appendages of CaUlnectes. nuile 375 



27. Abdominal outlines of Callinectes, female 375 



28. Fossil Callinecte-'^ 375 



29. Pseudothelph usa manna, male 379 



30. Fresh-water crabs of the genus Pseudoihelphusa 379 



31-32. Cambrian fossil Medusa- 014 



33. The Island of Margarita, Venezuela 685 



34. Cranium of Pallas' cormorant 719 



35. Crania of Pallas" cormorant 719 



XllI 



