. Introduction to zoology; a guide to the study of animals, for the use of secondary schools;. FKJ. , one of the Le-dida*. Foot protruding size. Photo, by W. H. C. FIG. 175.— Oxtrea virg/niarta, the Eastern oyster. One-third nat. size. Photo, by W. H. C. P. cipal European species. In Japan there is a species occa-sionally gaining a length of three feet. The oysterwas formerly commoner and larger north of Cape Cod than 1 From Greek name for oyster. 2 Fig. 175. 188 ZOOLOGY it is now, for the great aboriginal shell-heaps (* Kitchen-middens) of the New England coast cont
. Introduction to zoology; a guide to the study of animals, for the use of secondary schools;. FKJ. , one of the Le-dida*. Foot protruding size. Photo, by W. H. C. FIG. 175.— Oxtrea virg/niarta, the Eastern oyster. One-third nat. size. Photo, by W. H. C. P. cipal European species. In Japan there is a species occa-sionally gaining a length of three feet. The oysterwas formerly commoner and larger north of Cape Cod than 1 From Greek name for oyster. 2 Fig. 175. 188 ZOOLOGY it is now, for the great aboriginal shell-heaps (* Kitchen-middens) of the New England coast contain shells ofenormous size. The cause of this gradual extinction ofthe oyster is uncertain, but is believed to be due partly togeneral climatic and geographic changes and partly toover-iishiiip\ o APPENDIX TO CHAPTER XII KEY TO THE PRINCIPAL FAMILIES OF MARINE LAMELLIBKAN-CHIATA OF THE EAST COAST OF THE UNITED STATES ADAPTED FKOM A. C. APUAK a\. Shell when closed at ventral side, gaping inure or less at the ends. bi. Without toothed hinge or proper ligament,often with accessory valves ; no distinct epi-dermis. ci. Length decidedly greater than heightCo. Length and height nearly equ
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectzoology, bookyear1900
