1895. ] NEW YORK ACADEMY OF SCIENCES. 157 
PrRIMITIA (7) FUSIFORMIS, n. sp. Pl. viii., figs. 3 @ and b. 
Valve spindle-shaped, bluntly pointed in front, obtusely round- 
ed behind, tumid. It has a shallow furrow on the anterior third, . 
extending from the back halfway across; behind the furrow at 
the median line of the valve is a low tubercle. 
Sculpture. The surface of the test is finely granulated; at 
the posterior end of the valve the pits are arranged lengthwise 
of the valve,and give that end a striated appearance. 
Size. Length 7 mm.; height 3 mm. 
Horizon and locality. Sandstone of the upper part of Assise 
3, at Hanford Brook. Rare. 
SCHMIDTELLA, Ulich. 
ScHMIDTELLA CAMRRICA, Nn. sp. Pl. vii., figs.-10 @ and bd. 
Valves ovately circular, somewhat wider than long, quite 
tumid, with the greatest convexity towards the hinge-line. 
There is a very narrow fold at the anterior (7) and on the ventral 
margin. MHinge-line about half of the length of the valve. 
Sculpture. Surface of the valves minutely pitted. 
Size. Length and breadth each 25 mm. 
Horizon and locality. Sandstone of the upper part of Assise 
3, at Hanford Brook. Scarce. 
LEPERDITIA, Rouault. 
The following species are referred provisionally to Leperditia ; 
unfortunately the material is defective, and in no instance have 
both valves been preserved in contact so that one could see 
whether they overlap and are unequal; it is on account of the 
size and general form of these crustaceans that they are thought 
to be referable to the genus above named, or one closely allied. 
LEPERDITIA (7) VENTRICOSA PI. viii., figs. 5 a to d. 
Trans. Roy. Soc. Can., vol. vii., p. 159, pl. vii., figs. 12 @ to d. 
Found in the dark gray sandstones of Assise 1, at Hanford 
Brook. 
LEPERDITIA (?) Sreapr PI. viii,, figs. 7 a to ¢. 
Trans. Roy. Soe. Can., vol. vii., p. 160, pl. vii., figs. 13 @ to e. 
Found with the preceding. Prof. T. R. Jones in a letter to 
the writer suggests that these two species may be of the genus 
Tsochilina. 
