: 
; 
: 
< Following the terminology of Milne- 
NOL. Xvn.—no xi. 84 
- 1883.] Geology and Paleontology. 1275 
unmistakable tracks, in the judgment of Professor Parker, who, 
rom long residence at Amherst, Mass., has become familiar with 
the thousands of footprints found in the Connecticut valley, and 
constituting the feature of the Amherst College museum, 
In 1880, Mr. R. C. Hills, of this city, found a few Triassic 
tracks on the western slope of the Rocky mountains, and the 
are now in the museum of Yale College. — Rocky Mountain 
News, 
Locomotive APPENDAGES OF Tritopites.—In the autumn of 
1882 the trilobite, Asaphus megistos (Fig. 1), was sent me for ex- 
amination. In the delay of correspondence with palzontologists, 
fortunately no report was made, for in the spring of 1883, twelve 
months after finding the first specimen, the same party found the 
second, which proved to be the matrix of the ventral surface of 
the first specimen. It was found about one hundred meters from 
the point where the first was obtained. 
About two-thirds of the cephalic shield is broken off. That 
part of the head anterior to a line drawn obliquely through the 
left eye to the middle of the pleura of the second thoracic somite 
on the right, is entirely wanting. With the head restored, the 
specimen would be about 18.5 centimeters (73g inches) long; in 
width, 11.5 centimeters (about 4% inches). On the ventral sur- 
enti 
thoracic, and four centimeters that of the abdominal portion of 
, Directly beneath the eight somites of the thorax, ‘ex pairs of 
Jointed limbs are distinctly seen; the two anterior pairs of append- 
ages are situated directly under the first two thoracic segments ; 
but from the character of these appendages, as well as the relation 
oral aperture certainly existed, and presumably they were joo 
Mts ar : i oove. 
€ not preserved at the median e awards for the several 
ee 
