96 
E. DE C. Clarke, C. Teichert and J. R. H. McWhae. 
of the shells have been lost. The other oaterops are less fossiliferous, con- 
taining but a few si)ecies of gastropods, peleeyiiods, Bryozoa^ and some 
echinoid s])ines. On the north shore of the bay the Hinestone is very massive 
and rather similar lithologically to the algal limestone of Locality A but 
algal concretions are rarer. 
The gastropods in this deposit seem to belong to such genera as 
Margntelhi, Xatica, Fhsu.h, Fullarid, itnd possibly others as well. Among 
the t^elet'Vpods Bdiinftia (lissiwilis (Tate), and Cardiam (O'caeformis Chap- 
man and Cres|)inj could be recognized. Some CuJtfris spines are also present. 
At. Loctditfi C limestotie is (*.\posed alniosi continuously for a distance 
of about 1-h) yards iii a clilf rising in jdaces to 20 feet abo\e the lake tloor. 
It shows the usual lateral variation in fauna ami some lensing of the beds. 
Text tig. 7. 
Locality C, on the Beiiinsnla, Lake Cowan. 
The beds are generally horizontal except at llie western end where for a 
few feet there is a dip to the south of 30° probably due to the action of 
groMuiig roots and of slumping consequent on undercutting. 
The lowest layer of the limestone is about eight feet thick and contains 
very numerous complete pectinid shells, the lower one or two feet being grey 
