Further Work in Kansas Chalk 1 1 7 



mismarked some of them, and also made it im- 

 possible to either replace more than a few of the 

 marginal elements, or to determine the outlines of 

 any of the plastral elements. Such work is dif- 

 ficult enough in well-equipped laboratories. How- 

 ever, none of the bones of the limbs are broken, and 

 Mr. Sternberg redeemed himself by discovering and 

 securing in such excellent condition No. 1421, as 

 just related." 



I learn from one of the Museum's staff that this 

 specimen is to be mounted this summer of 1908, and 

 placed on exhibition. As long as the Carnegie 

 Museum stands, this splendid example of the great 

 sea-tortoise will be admired by lovers of nature. In 

 shape it is very like the present-day turtle of the 

 Mediterranean. Its huge front paddles, with a span 

 of ten feet, were armed with horrid claws. The 

 hind ones were stretched out parallel with the body 

 and used as sculls by this " boatman of the 

 Cretaceous." 



An account of my work in the Kansas Chalk 

 would not be complete without some mention of my 

 discovery, in several small localities, of the crinoid 

 Uintacrinus sodalis Grinell. According to Mr. 

 Frank Springer, our noted American authority on 

 this subject, only seven localities were known in 1901 ; 

 he did not know of my discoveries. I can bear wit- 

 ness with him, though, to the rarity of this species. 



