226 LTROPUPA. 



The figure represents a shell from the Lowe collection. 

 It is smaller than saxicola, length 1.55, diam. 0.8 mm. In 

 his second description Lowe gives the length as 114 to l 1 /^, 

 diam. % mm. His description, translated above, was from 

 a shell without the upper palatal fold, perhaps not fully 

 mature. Wollaston remarks that "the P. seminulum Lowe, 

 which was detected by Mr. Leacock at the Cabo Garajao 

 or Brazen Head, does not appear to me to differ specifically, 

 in any single particular, from the present species [i. e.. 

 saxicold]." 



Genus LYROPUPA Pilsbry. 

 By H. A. Pilsbry and C. Montague Cooke. 



Lyropupa PILS., Proc. A. N. S. Phila. 1900, p. 432 (as a sub- 

 genus of N esop'U-pa-} , type Pupa- lyrata Gould. ANCEY, Proc. 

 Malac. Soc. London vi, 1904, p. 124 (as a genus). 



The shell is openly rimate, often perforate, the shape from 

 broadly ovate to cylindric ; embryonic 1^ whorls microscopi- 

 cally granulose, sometimes spirally striate, the following 

 whorls abruptly becoming strongly sculptured with axial or 

 oblique ribs narrower than their intervals. Aperture trun- 

 cate above, rounded below, the peristorne continuous, free and 

 expanded. Angular lamella emerging to the margin ; parietal 

 strong, somewhat immersed. Columellar deeply placed, 

 strongly developed, axial or oblique. Two palatals the upper 

 very long, emerging to the lip, defining a sinulus. A deeply 

 placed basal fold often developed. Axis hollow and rather 

 large. Immature stages toothless. 



Type Pupa lyrata Gould. Distribution, Hawaiian Islands. 



There are no inferior tentacles. The head has rounded 

 lateral processes and a somewhat prominent median convexity 

 above. The sole is almost white in species examined, the back 

 and face pigmented. 



Important specific characters are found in the form and ar- 

 rangement of the palatal folds, but they are so deeply im- 

 mersed that the shell must be broken to see them. Holding it 



