406 GEOLOGY OF OLD HAMPSHIRE COUNTY, MASS. 



Cope, who referred it to the Triassic Dinosauria and called special attention 

 to the very peculiar ischium. 



In 1876 I.can-ied the bones to New Haven, where they were studied 

 by Professors Huxley and Marsh, and casts of them were taken by the 

 latter. Professor Huxley was inclined to think them identical with one or 

 other of two genera of reptiles found by Stutchbury in the Trias near 

 Bristol, England, and preserved in the museum of that city — Paleosauras 

 and Thecodontosaurus — but because of some loss or change of labels it 

 was not possible to tell which of the bones preserved in the museum should 

 be called by the first of these names and which by the second. At a later 

 time Professor Marsh gave a new name to the genus, as indicated in the 

 synonymy above, and still later, finding that this name had been preoccu- 

 pied, he gave the fossil another name. 



The bones include a nearly perfect foot, the ischium, femur, caudal ver- 

 tebrae, and many imperfect fragments. A few very imperfect fragments of 

 the bones of a similar species were found earlier, and are preserved in the 

 museum, but without locality ; and I have found many imperfect fragments 

 of bone in the indurated sandstone of the contact zone of the easternmost 

 volcanic core in Belchertown. This induration has prevented the percola- 

 tion of water, which has doubtless carried away many bones formerly 

 embedded in these coarse sandstones. 



