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THE 



| AMERICAN 

 NATURALIST 



A MONTHLY JOURNAL 



DEVOTED TO THE NATURAL SCIENCES 



IN THEIR WIDEST SENSE. 



XXVI. FEBRUARY, 1892. No. 302. 



CONTENTS. 



)F Fecundation. j Geological Survey, 1890 — Geological Survey of 



H.J. Webber. I neral— Paleozoic 



Petrography. — Petrographical 



Teleosts ; (Ulus- 

 C. L. Herrick. 



A AM M AL, Notoryctes typklops; ( 1 I 



Zoology.-Tbe 



f Florida. Spermato 



Clarence Bloonifield Moore. 129 



Dog— Zoological 



^ TURE 147 ! Embryos 



d Paleontology. — The Crystalline Development of the Renal Organ 



«"="'=> '" M.'-acl.usetts— The Fauna Archeology and Ethnology.— 1 



. 





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