historicalbookimages:page 347 of “Introduction to zoology; a guide to the study of animals, for the
historicalbookimages:page 347 of “Introduction to zoology; a guide to the study of animals, for the use of secondary schools;” (1900) -- source link
historicalbookimages:page 347 of “Introduction to zoology; a guide to the study of animals, for the use of secondary schools;” (1900) -- source link