112 THE NAUTILUS. 



the axial edge narrower, not perceptibly angular; the other varices 

 are much smaller and les? prominent, about seven to twelve on each 

 half whorl between the larger series, sharp edged and subequal. 

 Height of ( decollate) shell 33, max. diameter 23 mm. 



Zeuglodon bed of the Jacksoniaa, near Cocoa P. O., Alabama, 

 Burns and Schuchert. 



This fine species is related to S. octolineata Conrad, which is found 

 in the same horizon, but has the large varices less conspicuous and 

 irregularly distributed. S. octolineata is also a smaller, more cylin- 

 drical shell. The present species is readily recognized by its pecu- 

 liar flattened aspect recalling Ranella. 

 Scala Mitchell! Dull. 



Shell rather large for the genus, thin, with rounded rather com- 

 pact whorls, well marked suture and elongated spire ; the color is 

 yellowish white, the basal area and a band somewhat above the 

 periphery dark reddish brown ; surface with numerous low spiral 

 ridges with wider interspaces covering the whorl, crossed by about 18 

 distant rather irregular low varical threads, slightly angulated just 

 in front of the suture ; the young whorls show a tendency to periph- 

 eral angulation ; basal area well marked, bordered by a low keel, 

 its spiral sculpture feeble but the varical ridges unchanged ; axis 

 imperforate ; aperture higher than wide, the peristome interrupted 

 over the body, the pillar lip strongly reflected, the outer lip narrow, 

 inconspicuously reflexed ; shell decollate but showing eight whorls, 

 and originally supplied with three or four more at least; height of 

 (decollate) shell 36, max. diameter 14, apical diameter at the decol- 

 lation 1'5 mm. 



Found on the beach of Matagorda Island on the Texas coast by 

 Hon. J. G. Mitchell, to whom it is respectfully dedicated ; the type 

 is in his collection. This is the finest recent species from shallow 

 water yet reported from the Gulf coast, and needs no comparison 

 with any other, as no American or exotic species has been figured 

 which is at all closely related to it. In a general way it is somewhat 

 like S. acuminata Sby. from Japan. 



SCULPTURE OF THE APICAL WHORLS, A NEW CHARACTER FOR DIS- 

 TINGUISHING GROUPS OF BULIMULI. 



BY HENRY A. PILSBRY. 



The classification of the American Bulimoid snails has been an 

 extremely intricate problem, but much has been done by Binni-y, 



