324 . THE GEOLOGIST. 
in liis first gathering, are the readily distinguishable Flicatula pecte- 
noides and Ostrea RauUniana. 
He will also meet with one or two other species of Plicatula and 
Oysters. 
Ligii. 32. — Li)na parulleta. 
Liy:n. 33. — Area carhiata. 
Tlie species of univalve shells of the Gault are few, although of 
two or three species the individuals are numerically abundant. Very 
Lign. a. — Turritella vil/raj/eaim. 
rarely a delicate Turritella (T. Vibrayeana, or T. Ilugardiwm) may 
be seen on the face of a newly cleaved block, and now <ind then a 
