178 DEANE ON THE SANDSTONE FOSSILS OF CONNECTICUT RIVER. 
anterior claws ; and the one where there are three to the claw of one side, for it is 
very common for one claw to be larger than the other, and sometimes the difference 
of size is exceedingly great.” 
“I cannot say that g and e are Crustaceans, as some large Isopods have legs that 
would make as strong impressions. But in Isopods the three anterior of the seven 
pairs of legs are directed obliquely forward, and the four posterior pairs obliquely 
backward, so that there would hardly be with such animals the exact uniformity of 
direction these tracks present.” 
In bringing this paper to a conclusion, I must here express my acknowledgements 
to the gentlemen who have so politely responded to my request for information. I 
am also under peculiar obligations to Roswell Field, Esq., who is the discoverer of all 
the original specimens of the two plates and those of the diagram A, and who kindly 
loaned the specimen. The estate of Mr. Field is situated at Turner’s Falls, and by 
his sagacity and activity he has been very successful in developing the history of these 
sandstone fossils. He has made many very splendid discoveries. The fossils that 
constitute the originals of the plates and diagrams are exclusively from Turner’s Falls. 
Greenfield, March, 1856 . 
