246 



[December, 



Unio Brumbyanus* Lea. Dated by Mr. Conrad, 1841 



1841 

 1841 - 

 1841 

 1841 



Unio amygdalus Lea. 

 " Buekleyi Lea. 

 Buddianus Lea. 

 fuscatus Lea. 

 minor Lea. 

 Monroensis Lea. 

 neglectus Lea. 



a 

 tt 



a 



Published in Memoir 

 read before and depo- 

 sited with the Amer. 

 Phil. Soc. June 18th, 

 1841. issued in Pro- 

 ceedings, No. 19, for 

 October, 1841. These 

 dates of Mr. Conrad's 

 are therefore correct. 



Published in Memoir 

 read before and depo- 

 sited with the Amer. 

 Phil. Soc. Aug. 18th, 

 1843. Permission giv- 

 en by the Society to 

 print the descriptions. 

 They were printed and 

 issued the following 

 1846 { clay, Aug. 19th, 1843. 

 Receipt of these print- 

 ed descriptions ac- 

 knowledged by the So- 

 ciety Sept. 15th, 1843. 

 Therefore six of these 

 are dated by Mr. Con- 

 rad three years after 

 they were printed and 

 issued ! ! 



Published in Memoir 

 read before and depo- 

 sited with the Amer. 

 Phil. Soc. May 2,1845. 

 Printed descriptions is- 

 sued in the Proceed- 

 ings of that month, No. 

 33, p. 165, issued Aug., 

 1845. Generally the 

 new species of this me- 

 moir are dated cor- 

 rectly (in 1845) by Mr. 

 Conrad. The tetra- 

 ffona is one year wrong, 

 and M. minor has no 

 date. 



Tn my last Memoir read before and deposited with the American Philo- 

 sophical Society, March 5th, 1852, there are over fifty descriptions of new 

 species. Two of these Mr. Conrad has omitted, viz. : U. Oregonensis Lea, 

 and U. sticcissus Lea. Twelve he inserts without date ; the remainder are 

 dated correctly, 1852. 



This finishes the corrections of the numerous errors of date in Mr. Conrad's 

 Synopsis, as regards the long series of my memoirs in the Trans. Am. Phil. 

 Soc. It will be seen by the above tables of corrections, that he has, under his own 

 rule of the time of issuing them printed, erroneously dated about ninety of my 

 species. I do not pretend in this rectification to correct the synonomy of the 



Anodonta tetragona Lea. Dated by Mr. Conrad, 1846 



* At page 245 of Mr. Conrad's Synopsis in M Proceedings," this is given as a 

 species ; at p. 250 it is made a synonym to glans Lea. 



