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. 

 Mesodon clausa Say. 

 Mesomphix l?evigatus Pfr. 

 Gastrodonta suppressa Say. 



Vitrina limpida Gld. 

 Vertigo bollesiana Mse. 

 Pupa corticaria Say. 



A NEW PAPUINA. 



BY CHARLES HEDLEY, SY'DNEY', 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 Sl^, 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 135, major, diam. 16, min. diam. 14 mm. 

 Hab. Bloomfield River, North Queensland. 



ON THE SPECIES OF MACTKA 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 



