78 THE NAUTILUS. 



With the tremendous traffic going on for nearly two years in 

 the conveyance of troops and provisions we may confidently 

 look for other introductions of European species. 



PBATICOLELLA CAMPI, SP. NOV. (PLATE VI, FIOB. 1 TO 4.) 



BY GEO. H. CLAPP AND JAS. H. FERRI8S. 



Shell narrowly umbilicated, globose, shining, opaque white 

 with translucent corneous bands, usually one just above the 

 periphery, one just below and numerous bands down to the 

 umbilicus, or the shell may be all opaque or all translucent be- 

 low the periphery. Whorls 4 with well impressed suture, body 

 whorl rounded, periphery high some shells showing a slight 

 angularity at the periphery. Aperture lunate-rounded, slightly 

 oblique, somewhat dilated above, lip thickened within and 

 widely dilated at the columellar insertion; there is a distinct, 

 though thin, callous deposit connecting the ends of the lip. 



Diameter 6, altitude 4 mm. There is a slight variation in 

 size but above is about the average. Animal not observed. 



Type locality. Fort Brown, Brownsville, Texas. " In sandy 

 soil from 1 to 6 inches below the surface, at the foot of the brick 

 piers" (J. H. F. ). It was also found in the "axils of banana 

 plants " and in the soil on the eastern side of the parade ground, 

 in both- instances with a number of other snails. Collected by 

 Jas. H. Ferriss and R. D. Camp in midwinter, 1913-1914. 

 Camp reports, Nov., 1918, that "the old building where we 

 found it has been removed and the parade ground torn up by 

 changes for the war." 



We take pleasure in naming this species after Mr. R. D. Camp 

 •who, for several years, has been collecting in the Brownsville 

 region. 



Mr. Ferriss noticed this form when first collected and insisted 

 that it was not the young of either P. berlandieriana or griseola 

 which were found with it; there was too much evidence of 

 maturity and its subsequent detection in drift from the Rio 

 Grande confirms this opinion. 



It differs from the young of the other species in being more 



