XXIV BUL1MULUS. 



Section Ataxas Albers, 1850. 



Long-conic, with 7-1 1 whorls coiled around a large, deep umbili- 

 cus. Type B. umbilicaris. Peru. 



B. umbilicaris Soul., x, 130. B. huayaboensis Dautz., J. de C., 



B. infundibuliformis Jay. 1902. 



B. infundibulum Pfr., x, 131. v. attenuata and rudis. 



v. umbilieatellus Pils., x, 131. B. moniezi Dautz, xiv, 136. 

 B. tubulatus Morel., x, 132. f. albescens Dautz. 



B. scalaricosta Morel., x, 132. 



Section Bostryx Troschel, 1847. 



Turreted, wrinkled, the last whorl or two free or separated by deep 

 sutures ; umbilicus inconspicuous. Type B. solutus. Peru, Chili. 



B. solutus Trosch., x, 133. B. holostoma Pfr., x, 134. 



Section Geopyrgus Pils., 1896. 



Turreted, tapering, rimate, composed of 9-10 whorls. Peru. 

 B. turritus Brod., x, 135, 200. 



Section Geoceras Pilsbry, 1896. 



Column-shaped, composed of 16-19 narrow whorls. Type B. 

 columeHaris. Andes of Peru. 



B. columeHaris Rve., x, 136. B. veruculum Morel., x, 137. 



B. cuspidatus Morel., x, 137. 



Section Peron&its Alb., 1850. 



Rimate or perforate, long-fusiform, slender, with 7-11 whorls. 

 Type B. pupiformis. 



(Group of B. pupiforims. Chili, Peru.) 



B. pupiformis Brod., x, 138. B. baeri Dautz., xiv, 135. 



B. anachoreta Pfr., x, 139. B. iocosensis Dautz., xiv, 135. 



B. lactiHuus Pfr., x, 140. B. emaciatus Morel., x, 143. 



B. atacamensis Pfr., x. 140. B. spiculatus Morel., x, 144. 



B. longnrio Crosse. B. acromelas Morel., x, 144. 



B. nanus Rve., x, 141. B. lichenorum Orb., x, 145. 

 B. Icucostictus Phil., x, 141. lichnorum Orb. 



B. scabiosus Sowb., x, 142. licheninn Beck. 



B. terebralis Pfr., x, 142. B. subcactorum Pils., x, 145. 



B. bisculptus Pfr., x, 142. B. tschudii Trosch., x, 146. 



