290 



BIBLIOGRAPHY OP 



[part II. 



Page 



Name. 



Dated by 

 Mr. Conrad. 



10 



TJnio acutissimus Lea. 



Aug. 1834. 



10 



asper Lea. 



1832. 



10 



pustulosus Lea. 



1832. 



10 



obesus Lea. 



1832. 



10 



castaneus Lea. 



1832. 



10 



varicosus Lea. 



1832. 



10 



Congaraeus Lea. 



1832. 



10 



decisus Lea. 



1832. 



10 



glans Lea. 



1832. 



10 



fabalis Lea. 



1832. 



10 



lens Lea. 



1832. 



10 



cuprinus Lea. 



1834. 



10 



pustulatus Lea. 



1832. 



10 



ebenus Lea. 



1832. 



10 



stapes Lea. 



1832. 



10 



trapezoides Lea. 



1838. 



10 Unio angulatus Lea. 1832. 



10 subovatus Lea. 1832. 



10 arcaeformis Lea. 1832. 



10 pileus Lea. 1832. 



10 trigonus Lea. 1832. 



10 subrotundus Lea. 1832. 



Published in memoir read 

 before and deposited with 

 the Am. Phil. Soc. May 7, 

 1830, and printed in Trans. 

 IV, 63. Distributed in the 

 latter end of 1831, and 

 acknowledged by corre- 

 spondents as received in 

 that year. A long review 

 of this, and the supplement 

 read May 20, 1831, appear- 

 ed in Silliman's Journ. for 

 Jan.,Feb.,andMarch,1832. 

 It will be observed that 

 Mr. Conrad makes three 

 dates for the species de- 

 scribed in this memoir, not 

 one of which is correct on 

 his own principle of the 

 issue of printed copies 

 being the time of date. 

 This memoir and the fol- 

 lowing supplement having 

 eighteen plates and nearly 

 fifty species, all colored, 

 required a long time to 

 finish, hence the delay be- 

 tween reading the memoir 

 and the issuing of it com- 

 plete. 



Published in memoir 

 (supplement) read before 

 and deposited with the 

 Am. Phil. Soc, May 20, 

 1831, and printed in Trans. 

 IV, 105. This supplement 

 was issued with the me- 

 moir. Therefore all these 

 dates of Mr. Conrad's are 

 one year after the memoir 

 • was distributed. 



