. L. u 
jd THE 
QUARTERLY JOURNAL 
GEOLOGICAL SOCIETY OF LONDON. 
EDITED BY 
THE ASSISTANT-SECRETARY OF THE GEOLOGICAL SOCIETY, 
Quod si cui mortalium cordi et curz sit non tantum inventis hzerere, atque iis uti, sed ad ulteriora 
penetrare; atque non disputando adversarium, sed opere naturam vincere; denique non belle et probabiliter 
opinari, sed certo et ostensive scire; tales, tanquam veri scientiarum filii, nobis (si videbitur) se adjungant, 
—Novum Organum, Prefatio. 
RE RE ne te 
VOLUME THE THIRTY-FIFTH. 
(28 + S61 y 2 
AT ORAL wuser 
LONDON : amen 
LONGMANS, GREEN, READER, AND DYER. 
PARIS: FRIED. KLINCKSIECK, 11 RUE DE LILLE; FB. SAVY, 24 RUE HAUTEFEUILLE. 
LEIPZIG: T. 0. WEIGEL, 
1879. 
SOLD ALSO AT THE APARTMENTS OF THE SOCIETY, 
MDCCCLXXIX. 
