74 THE NAUTILUS. 



Longest diam. about 2 mm. 



Locality. De Soto, Miss. Claibornian. 



Eemarks. This singular little species is doubtfully placed in 

 Adeorbis. It might just as well be put in Valvata. It is hardly an 

 embryonic shell, but in any event it is an interesting development 

 wherever it really belongs. 



Adeorbis sotoensis n. sp. PI. IV, figs. 7, 8. 9. 



Shell small, whorls five; spire pointed, smooth; whorls covered 

 with spiral lines which are nearly obsolete just below the suture, 

 growing more prominent on the body whorl as they approach the 

 periphery. The effect is to make a broad, nearly smooth band on 

 the whorls to the eye; under a glass this space shows exceedingly 

 fine spirals. Body whorl strongly keeled, base smooth, umbilicus 

 moderate. Aperture ovate. Diameter a little less than 2 mm. 



Locality. De Soto, Miss., just above the Ostrea selloeformis bed. 

 Claibornian. 



Lima harrisiana n. sp. PI. IV, figs. 10, 11. 



Shell oblong, slightly oblique, radially sculptured, covered with 

 close-set lines slightly nodular; between them in the sunken spaces 

 are fine dotted lines which die out towards the hinge line and umbo. 

 The ribs are very numerous, near the umbo on one side they appear 

 quite nodulous; ears very unequal, hinge nearly straight, but some- 

 what inclined to the central axis. In a young specimen the outer 

 ribs appear to be nodulous and the inner margin denticulated. 



Longest axis 17 mm. 



Locality. Smithville, Texas. Claibornian. 



Remarks. This species seems to be rather close to L. vicksburg- 

 iana Dall, but has many more ribs, over 50 in all. 



Named in honor of Prof. G. D. Harris, who has kindly furnished 

 the illustrations. 



Errata. 



In Bulletin of American Paleontology, No. 8, 1897, p. 10, PI. II, 

 fig. 5, I described a small shell as Actaeon cossmanni. This should 

 have been v/rhten Acteoniria (Crenilabium) cossmanni, nobis. A 

 mistake was made in transcribing. It was however manifest as the 

 writer placed it in the proper subgenus. 



