136 THE NAUTILUS. 
In addition to the above the following species were collected by 
Mr. Geo. H. Clapp; these complete to the present date all the 
species found in Allegheny County, Pennsylvania. 
Strobila labyrinthica Say. | Vitrina limpida Gld. 
Mesodon clausa Say. | Vertigo bollesiana Mse. 
Mesomphix leevigatus Pfr. Pupa corticaria Say. 
Gastrodonta suppressa Say. 
A NEW PAPUINA. 
4 BY CHARLES HEDLEY, SYDNEY, AUSTRALIA. 
Papuina cerea Hedley. 
Shell thin, translucent; contour trochoidal, color waxen white, 
becoming yellowish on the 3rd and 4th whorls, encircled below 
the suture by an opaque white thread, nowhere are translucent lines 
or spaces visible. Sculpture; surface of 
a waxen polish; transverse growth 
lines can be detected by the unaided 
eye, and spiral grooves, almost effaced 
above but plainer on the base, may be 
deciphered with a lens. Whorls 53, flattened, regularly increasing, 
the last constituting five-eighths of the shell’s height, angled at the 
periphery, descending considerably and abruptly at the aperture, 
gibbous at the point of flexure. Suture impressed. Aperture very 
oblique, anterior margin waved ; columella oblique; wide, extending 
nearly to the angle of the aperture, subtruncate below. A thin, trans- 
lucent, shining callus extends over the imperforate axis to the inser- 
tion of the anterior margin of the lip. 
Height 133, major. diam. 16, min. diam. 14 mm. 
Hab. Bloomfield River, North Queensland. 
ON THE SPECIES OF MACTRA FROM CALIFORNIA. 
BY WM. H. DALL. 
In revising the Tertiary Mactracea of the southeastern United 
States, it became necessary to examine the recent species and work 
