348 AMERICAN JOURNAL 



are widely different. My most reliable friend, Mr. Arthur 

 Adams, collected specimens both of caeca and csecoides in the 

 Japanese waters. The shells collected by Dr. Stimpson in the 

 North Pacific Exploring Expedition (Hakodadi and Arctic 

 Ocean) were marked Lejpeta "cseca, var. concentrica, Midd." by 

 Dr. Gould: Smiths. Cab. no. 1718. 



Montreal, C. K, June 20th, 1866. 



