246 AMERICAN JOURNAL 



11. GoNioBASis BULBOSA, Gould. — t. 24, f. 17. 



Description. — "Shell small, conically oblong, shining, eroded, 

 greenish-brown; spire of 2-3 rounded whorls (remaining); su- 

 ture profound; aperture ovatelj rounded, scarcely efiused. 



Dimensions. — Long 1-2, lat. 9-20 poll. 



Habitat. — Columbia River. 



The whorls are very cylindrical, so as to appear like a 

 succession of bulbs. It is much like M. perfusca, Anthony, 

 but in that the whorls slope gently to the suture. A broken 

 specimen shows that it often attains a considerable size." 



This species is exactly similar in outline to Mr. Lea's New- 

 herryi, but none of the specimens before me (including Dr. 

 Gould's types) exhibit the slightest indication of bands, while 

 Mr. Lea declares his species to be always banded. 



The shell figured is the largest I have seen, and considera- 

 bly exceeds the dimensions of Dr. Gould's type specimen. 



