S. 
2 
D. Walcott, VDSS Condo ale 
S. Bees 
ae 
Geol. Survey, . 
“vor. L. es eta ‘JULY, 1895. 
_ Established by BENJAMIN SILLIMAN in 1818. 
THE 
AMERICAN 
JOURNAL OF SCIENCE. 
Epirorn: EDWARD S. DANA. 
ASSOCIATE EDITORS 
% el Proressors GEO. L. GOODALE, JOHN TROWBRIDGE, 
-H. P. BOWDITCH anv. W. G. FARLOW, or Camprines. 
| Proressors H. A. NEWTON, O. C. MARSH, A. E. VERRILL 
AND H. S. WILLIAMS, oF New Haven, 
Prorressor GEORGE F. BARKER, or Puinaperputa, 
THIRD SERIES. 
VOL. L—[WHOLE NUMBER, CL.] 
' No. 295.—JULY, 1895. 
WITH PLATES I-I, 
NEW HAVEN, CONNECTICUT. 
1895. 
TUTTLE, MOREHOUSE & TAYLOR, PRINTERS, 125 TEMPLE STREET. 
7 E Published monthly. Six dollars per year (postage prepaid). $6.40 to foreign sub- 
in _ seribers of countries in the Postal Union. Remittances should be made either by 
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