144 THE NAUTILUS. 



Errata. — Numbers 8, 9 and 10 of Vol. xxi were marked by 

 error " Vol. xxii " on the date lines, pages, 85, 97, 109, but not 

 on the cover of those numbers. This note is published to obvi- 

 ate errors in binding Vol. xxi. 



The following corrections should be made in Vol. xxii : 



P. 47, end of line 4, delete 7. 



P. 78, 7th line from foot, for plate vi, read vii, viii. 



P. 82, top line, for Nautilus xxii, read xxi. 



P. 101, under Quadrula coccinea, in place of ^^ Found gravid 

 on June 18,'''' etc., it should read : Found gravid by the writer on 

 June 18, ^08, in Neshannock Greek, Lawrence Co., and received 

 gravid from the Allegheny River, McEean Co. {collected by Mr. 

 Dennis Dally on June 22, ''08). 



The marriage is announced of Miss Elizabeth J. Letson, Di- 

 rector of the Buffalo Academj- of Natural Science, to Mr. Wil- 

 liam Alanson Bryan, of the Pacific Institution of Science, on 

 March 16th. Mr. and Mrs. Bryan will be at home in Honolulu 

 after May 4th. 



Dr. V. SiKRKi is spending the month in studying Sphaerium 

 and Fisidium in the museums of Boston, Cambridge, Philadel- 

 phia and Washington. 



Mr. a. a. Hinkley, who returned from a collecting trip in 

 Mexico last month, reports good collecting, especially in fresh- 

 water mollusks. 



An interesting biographical memoir of William More Gabb, the 

 palaeontologist and conchologist, read by Dr. W. H. Dall at the 

 November meeting of the National Academy of Sciences, has just 

 been published. A bibliography of Gabb's scientific works is ap- 

 pended. 



