Seymour.] 
182 
[Feb. 6, 
trurus. A great portion of the route is really gone over by a 
living species, and this fact, in connection with what is known of 
the effects of use and disuse from whatever causes, points in a very 
direct manner to the likelihood that the rattlesnakes have travelled 
one somewhat similar. 
EXPLANATION OF PLATES. 
Figs. 
PLATE I. 
1, 2. Sistrurus catenatus B af. ; Garm. X4. 
3, 4. Sistrurus catenatus. X 3£. 
5, ,6. Crotalus confluentus Say. X 2. 
Fig. 7. Crotalus horridus LinnA Nat. size. 
Fig. 8. 
Figs. 9, 10. 
“ 11 , 12 . 
“ 13, 14. 
Fig. 15. 
Figs. 16, 17, 18. 
PLATE II. 
Crotalus horridus. Nat. size. 
Bhinocerophis ammodytoides Leyb.-, Garm. X2£. 
Lachesis mutus L. ; Daud. X3. 
Ancistrodon piscivorus LaC. ; Cope. X 2. 
Ancistrodon contortrix L. ; B. & G. X3£. 
Ancistrodon contortrix. X2£. 
General Meeting, Feb. 6, 1889. 
Mr. J. H. Emerton in the chair. 
Mr. Geo. H. Barton read a paper on “ The Great Precipice of 
Oahu, Sandwich Islands.” He pointed out the physical features of 
this elevation by means of a map and a plaster model, and dis- 
cussed the theories of Dana and Dutton as to the method of its for- 
mation. 
The Secretary spoke of the resemblance of coral rocks from 
Oahu and the Bermuda Islands and discussed the evidences of ele- 
vation and submergence of coral islands. 
The following paper was then read : 
LIST OF FUNGI, COLLECTED IN 1884 ALONG THE 
NORTHERN PACIFIC RAILROAD. 
BY A. B. SEYMOUR. 
The fungi enumerated in this list were collected by the author 
in August and September, 1884, along the line of the Northern 
