BIBLIOGRAPHY OK PUBLICATIONS OF ISAAC LEA, LL. D. Gl 



1854. Lea, Isaac — Coutiiuied. 



Published in Memoir read be- 

 fore ;ind dojiosited with tlie xVnier. 

 Phil. Soc, Aiij;. 18th, 1843. Per- 

 mission piveu by the Society to 

 print the descriptions. They were 

 printed and issued the followinj; 

 day, Aug. 19th, 1843. Iteceipt of 

 these printed descriptions ac- 

 knowledged by the Society Sept. 

 15th, 1843. Therefore six of these 

 are dated l)y Mr. Conrad three 

 years after- they were printed and 

 issued ! ! 



Anodonta tetragona, Lea. Dated by Mr. Conrad, 1846 



Published in Memoir read be- 

 fore and deposited with the Amer. 

 Phil. Soc, May 2. 1845. Print.-d 

 descriptions issued in the Pro- 

 ceedings of that month, No. 33, p. 

 ( 165, issued Aug., 1845. Generally 



I the new si)ecies of this memoir 

 are dated correctly (in 1845) by 

 j Mr. Conrad. The tetragona is one 

 I year wrong, and M. minor has no 

 I. date. 



"In my last Memoir read before and deposited with the American Philosopliical Society, 

 March 5th, 1852, there are over fifty descriptions of new species. Two of these Mr. Conrad 

 has omitted, viz. : V. Orcgonensis Lea, and V. succissus Lea. Twelve he inserts without date ; 

 the remainder are dated correctly — 1852. 



"This finishes the corrections of the numerous errors of dale in Mr. Conrad's Synop.sis, 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 lie has, under his own rule of the time of issuing them 

 printed, erroneously dated about ninety (,f my species. I do not pretend in this rectification 

 to correct the synonymy of the Synopsis, as I have stated before. It would require too much 

 space and time. Those interested in the subject must judge between the two synopses." 



102. 



1855. Lea, Isaac. [Exhibition of the tanntMl skiu of the Walrus used for polishing 

 cutlery.] <^Proc. iicad. Nat. Sci., Phila., vii, p. 265. 

 Exhibited February 20, 1855. 



103. 



1855. Lea, Isaac. Description of a new Mollusk from the Red Sandstone near Potts- 

 ville, Pa. <^rroc. Acad. Nat. Sci., Phila., vii, pp. 340-341. No. 9, May and 

 June, 1855, with pi. iv. For separate see No. 104. 



Read before the Academy Natural Sciences, Phila., May 22, 1855. (See Proc. Amer. 

 Philos. Soc, vi, p. 135.) 



Cypricardia Lcidyi, Lea, n. s 341 



104. 



1855. Lea, Isaac. Description | of a | New Mollusk | from | The Red Sandstone, near 



Pottsville, Pa. | [Read before the Academy of Natural Sciences, May 22, 



1855.] I By I Isaac Lea. | — | Philadelphia, | Merrihew and Thompson, Priut- 



' ers, I Merchant Street, above Fourth. | l!:?55. This is a separate of No. 103. 



Eeceived by the Academy Natural Sciences, Phila., on or before September 4. 1855. (See 



Proc. Acad. Nat. Sci., Phila., vii, p. xxxiv.) 



