. Animals of the past, an account of some of the creatures of the ancient world. of Mosasaurs in fine collection is in, the Museum of the StateUniversity of Kansas, at Lawrence. The best Zeuglodon, the first to show the vestigial hindlegs and to make clear other portions of the structure, isin the United States National Museum. The great sharks are known in this country by theirteeth only, and, as these are common in the phosphate RULERS OF THE ANCIENT SEAS 69 beds, specimens may be seen in eUmost any collection. Inthe United States National Museu/m, the jaws of a twelve-foot
. Animals of the past, an account of some of the creatures of the ancient world. of Mosasaurs in fine collection is in, the Museum of the StateUniversity of Kansas, at Lawrence. The best Zeuglodon, the first to show the vestigial hindlegs and to make clear other portions of the structure, isin the United States National Museum. The great sharks are known in this country by theirteeth only, and, as these are common in the phosphate RULERS OF THE ANCIENT SEAS 69 beds, specimens may be seen in eUmost any collection. Inthe United States National Museu/m, the jaws of a twelve-foot blue shark are shown for comparison. The largesttooth in that collection is 5% inches high and 5 inchesacross the base. It takes Jive teeth of the blue shark tofil the same numier of inches. The Mosasaurs are descried in detail by Professor WUliston, in Vol. IV. of the University GeologicalSurvey of Kansas^ There is a technical—and, conse-quently, uninteresting—account of Zeuglodon in of the « Proceedings of the United States Na-tional Museum^ po^e Fig. 12. — A Tooth of Zeuglodon, one of the YokeTeeth, from which it derives the name. BIRDS OF OLD With head, hands, wings, or feet, pursues his snmis, or sinks, or wades, or creeps, orjlies. When we come to discuss the topic of the ear-liest bird—not the one in the proverb — ourchoice of subjects is indeed limited, being re-stricted to the famous and oft-described Archse-opterpi from the quarries of Solenhofen, whichat present forms the starting-point in the his-tory of the feathered race. Bird-like, or atleast feathered, creatures, must have existedbefore this, as it is improbable that feathersand flight were acquired at one bound, andthis lends probabihty to the view that at leastsome of the tracks in the Connecticut Valleyare reaUy the footprints of birds. Not birds aswe now know them, but stiU creatures wearingfeathers, these being the distinctive badge andlivery of the order. For we ma
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectpaleontology, bookyea
