GEOLOGY AND MINERALOGY. 297 
From this exposure, the following fossils were obtained in the township of 
Windham :— 
Zaphrentis prolifica .......0.ccevecececssccee Billings, 
Euomphalus (not named ; a very beautiful species.) 
Orthoceras (one species, not named.) 
In the township of Middleton :— 
Stenopora (resembles S. petropolitana.) 
Histulipora Canadensis ...ccccecceccssaccs .-. Billings. 
Zaphrentis prolificd ....600 veveeee sisiacie sfelsterel SULLA 
Heliophyllum Oanadense,.......000000 eleietate Billings, 
Michelinea convetd....ccsceccecscvssevee --.. D’Orbigny. 
Crinoids (two or three species.) 
Orthis (apparently two species; imperfect speci- 
mens only were obtained.) 
Strophomena (two species, not named.) 
Athyris rostrata, or a closely allied species, .... Hall. 
Atrypa reticularis (very abundant) ............ Linn, 
Pentamerus aratus. 
Spirifera accwminata (common)..........+-.... Conrad. 
QTEGATID oo cevssccccccevcvccssecces Clapp. 
— (not named.) 
MCIRG LlIplicd 26. acccee vseseuves bin Maen «<i tall, 
(one species, not named, found in Wind- 
ham.) 
Conocardium trigonalis........ pret Wart oe ay ELIE 
Platyceras (?) 
Loxonema (two species, not named.) 
Lituites (?) (one specimen. ) 
Phacops bufo. 
Dalmannites (not named.) 
The surface of the area between this exposure and the one in the north-east. 
angle of Windham is covered with fine sand in which boulders rarely occur. 
Cayuga, C. W. J. DeCEW, P.LS. 
ERUPTIVE SERPENTINES OF TUSOANY. 
The origin of Serpentine Rock is still a somewhat debateable point in 
Geology. Whilst most observers look upon this rock as partly of eruptive and 
partly of metamorphic origin, according to locality, others, and especially those 
of the more modern school, appear inclined to consider it in all cases as a meta- 
morphic product. Careful records of its conditions of occurrence, therefore, in 
different regions, become of general interest and value. In this view, we have 
embodied in our Geological Notes, the following extract from an interesting 
memoir communicated by W. P. Jervis, Esq., F.G.S., to the Geological Society of 
