64 BIBLIOGRAPHY OF PUBLICATIONS OF ISAAC LEA, LL. U. 



1854. Lea, Isaac — Contiuiied. 



" As much of Mr. Conrad's Synopsis involves the names and claims of Mr. Katinesqvie, it 

 becomes necessary to say something in explanation of my having iu my papers adopted but 

 few of his names." 



Here follow four or five pages, in which Mr. Lea, by quoting the opinions of many con- 

 chologists, clearly shows that the descriptions of Mr. Kaflnesque's species arc so incomplete 

 that they are worthU'SS iu determining species. 



"We come now to by far the most important part of Mr. Conrad's Synop.sis, the dates." 



"In order to occupy as little space as possible, I will endeavor to tabulate these errors. 

 To take up my species in the order in which they occur in his Synopsis and correct them, 

 seriatim, would require great space. I commence with my first memoir, in 18'27, and proceed 

 chronologically to 1852. 



f Published in Memoir read before 

 I and deposited with the Am. Phil. 

 Soc, Nov. 2, 1827, and printed iu 

 <J Trans., vol. iii, p. 259. Distributed 

 early in 1828.+ Noticed in Silli- 

 man's Jour., Oct., 1820, and the 

 Trans, cited for 1827. 



Unio lanceolatus, Lea. 

 " irroratus. Lea.* 



Dated by Mr. Conrad, 



1832 

 tl852 



Unio occidens, Lea. Dated by Mr. Conrad, 1832 1 



" rubiginosus, Lea. " " 1832 



" heterodon. Lea. " " 1833 



" multiradiatus, Lea. " " 1832 



" Becuris, Lea. " " 1832 



Published in Memoir read befoie 

 and deposited with the Atu. P. S., 

 March Cth, 1829, and printed iti 

 Trans., vol. iii, p. 401. Distributed 

 in May or June, 1829. The le- 

 ceipt of it, with comments, is 

 acknowledged in a letter from 

 Cincinnati, June 27th, 1829, and it 

 is noticed in Silliman's Journal, 

 vol. xvi, 1829. 



Published in Memoir read be- 

 fore and deposited with the Am. 

 P. S., May 7th, 1830, and printed 

 in Trans., vol. iv., p. 63. Dis- 

 tributed in the latter end of 1831, 

 and acknowledged by correspond- 

 ents as received in that year. -A 

 long review of this, and the sup- 

 plement read May 20, 1831, ap- 

 peared in Silliman's Jour, for 

 Jan., Feb., and March, 1832. It 

 will be observed that Mr. Conrad 

 makes three dates for the species 

 described iu 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 following 

 supplement having eighteen 

 plates and nearly fifty species, all 

 colored, required a long time to 

 finish, hence the delay between 

 reading the memoir and the issu- 

 ing of it complete. 



*The four other species of this memoir are given by Mr. Conrad without any date. 



t This may be a typographical error and intended to be 1832, the same as lanceolattts, above it. Giving 

 Mr. Conrad the benefit of this, it will still be found that he has dated these two species /tc years after 

 they were read to the Society, four years after they were printed and issued, and t2vo years after the 

 date of the title-page of the whole volume. 



J A correspondent in Cincinnati, under date of April 25th, 1828, acknowledges the receipt of this 

 paper, and commcnt.s on the descriptions and the plates, and particul.arly the anatomical parts. He 

 had received impressions of the plates in the previous December. 



