XX xii BULIMULUS. 



B. sarcochilus Pfr., xi, 80. B. pubescens Moric., xi, 81. 



B. constrictus Pfr., xi, 80. B. argentinus Anc., xiv. 147. 



tateanus Guppy. B. heterogrammus Mor., xi, 321. 



angostiirensis Grun. 



DIVISION III. Bulimuli with the nepionic whorls sculptured with 



regular j straight vertical riblets. 



Discontinuously distributed from the south-central United States 

 southward to the Galapagos and Peru in the west, and Argentina in 

 the east. Sufficient magnification usually shows delicate spiral stria? 

 between the riblets of the nepionic shell. In Neopetrceus and Drymceus 

 this sculpture becomes far more strongly developed. The shell is 

 dull, brown or white, sometimes streaked but very rarely banded. 

 The contour varies from ovate to pillar-shaped. The sections are 

 separated chiefly by their geographic distribution, and merely stand 

 for groups of species of common ancestry, none of which have 

 diverged much structurally from the precursor of the entire series. 



Section Protoglyptus Pils., 1897. 



Man. Conch, xi, p. 84. 



A group of northern and eastern South America, extending into 

 some of the Caribbean islands. The Peruvian species are whitish 

 and calcareous ; the others are thin, brown or corneous, and fre- 

 quently hairy. Binney found the jaw and teeth of B. durus similar 

 to those of typical Bulimulus. 



B. pilosus Guppy, xi, 85. B. crepundia Orb., xi, 90. 



B. sanctaeluciae Sm., xi, 86. constrictus Rve. 



v. lucias Pils., xi, 86. redditus Rve. 



B. chrysaloides Pils., xi, 87. B. rivasii Orb., xi, 91. 



B. durus Spix, xi, 87. B. trichodes Orb., xi, 92; xiv, 148. 



B. ovulum Rve., xi, 88. B. exornatus Rve., x, 171; xiv, 



B. pachys Pils., xi, 88. 137, 282. 



B. eudioptus Pils., xi, 89. * * * * # 



B. montivagus Orb., xi, 90. B. pileiformis Moric., xiv, 149. 



cutuculptus Anc., xiv, 147. ***** 



v. chacoensis Anc., xiv, 147. B. glyptocephalus Pils., xi, 93. 

 B. pollonerae Anc., xiv, 148. B. sarcochrous Fils., xi, 93. 



B. haematospira Pils., xiv, 149. 





