THE NAUTILUS. 



VOL. XXX. MARCH, 1917. No. 11 



LOBOA BRUNOI N. G., N. SP., A LAND SHELL FROM THE BRAZILIAN 



ISLAND OF TRINITY. 



BY DR. HERMANN VON IHERING. 



The present Director of the Brazilian National Museum at 

 Rio de Janeiro, Dr. Bruno Lobo, has rendered to science an 

 excellent service in accompanying, with some employees of that 

 museum, the expedition which in the present year was under- 

 taken by the Admiralty for political and military reasons. It 

 will be a matter of great interest to know the geological and 

 biological results of the expedition. 



Dr. Bruno Lobo has kindly charged me with the study of the 

 Mollusca which have been collected by the expedition. I shall 

 give information on the matter in the official publication, but 

 there is one point which I desire to communicate immediately 

 to my competent friend, Mr. H. A. Pilsbry, hoping to hear his 

 opinion. Among the marine shells I have found also a small 

 land shell, which evidently inhabits this island. The shell is 

 quite intact and not worn in its sculpture, but of a chalky white 

 aspect not rare in shells exposed to an arid environment. The 

 shell is of a stenogyroid habitus and seems to me the represen- 

 tative of a new genus of the family Achatinidae. I give here 

 the description accompanied by a figure. 



LOBOA BRUNOI n. g., n. sp. PI. IV, fig. 7. 



The shell has a conic-turreted form and is of rather solid 

 texture, perforate, of a dirty chalky-white color. The whorls, 



