Vol. 30, pp. 9-12 January 22, 1917 



PROCEEDINGS 



OF THE 



BIOLOGICAL SOCIETY OF WASHINGTON 



NEW BULIMULUS FROM THE GALAPAGOS ISLANDS 



AND PERU. 



BY WILLIAM HEALEY DALL. 



Among some alcoholic specimens collected by the "Albatross" 

 at the Galapagos Islands in 1887-8, were two small specimens 

 belonging to the section Naesiotus which were overlooked at the 

 time of Dr. Stearns' report of 1893.* Being engaged on a report 

 on a collection made during the California Academy of Sciences 

 Galapagos Expedition of 1905-6, it seemed proper to describe the 

 above mentioned species in order that they might be included 

 in the general summary of the landshell fauna. 



Bulimulus (Naesiotus) saeronius n. sp. 



Shell very small, smooth, short-conic, the last whorl much the largest, 

 five-whorled, the apex dimpled, the apical whorl delicately transversely 

 striated, the suture deep, widening and becoming channelled on the last 

 whorl; the whorl in front of it minutely crenulately marginated; color 

 pale straw yellow, with an obscure, darker, narrow peripheral band on 

 the last whorl; base rounded, more or less transversely wrinkled, with a 

 narrow umbilical perforation; margin of aperture continuous, sharp, 

 expanded, internally thickened; pillar lip white, very solid, with a 

 prominent median tubercle; body with a relatively large, prominent 

 tooth, which is but little prolonged into the interior of the whorl; the 

 outer lip has no callosity. Height, 7.0; max. diameter. 4.5; height of 

 last whorl, 4.5; of the aperture, 3 mm. 



Indefatigable Island, Galapagos group. U. 8. Str. Albatross. Cat. No. 

 TJ. S. Nat. Mus. 274,097. 



Of the group of species with a denticulated aperture which is peculiar 

 to this island, this is the smallest. 



* Proc. U. S. Nat. Mus., vol. XVI. No. 942. 



4— Proc. Biol. Soc. Wash., Vol. 30, 1917. (9) 



