162 BIBLIOGRAPHY OF PUBLICATIONS OF ISAAC LEA, LL. D. 



1870. Lea, Isaac— Coutiuued. 



edition was issued, I have had no reason to believe tbat any better arrapgement could be 

 devised in the present state of our knowledge. The tables have therefore been extended to 

 the present time, and have been so much enlarged with new matter as almost to entitle the 

 work to bo considered a new one. This lias been done with a faithful desire to recognize 

 every fellow-laborer in this group, and to render to each one full justice. Some may have 

 been omitted, for want of access to their works — none intentionally. 



The present edition is greatly improved and enlarged by additions to the geographical dis- 

 tribution tables, and by the habitat of each of the species ; and the Index referring to the 

 tables of species and synonymy has had the exact references fully made to the works where 

 they were originally announced. These two very important additions to the previous edi- 

 tions will facilitate the use of reference to all the works on the subject which this ' Synopsis ' 

 embraces. 



These tables were originally made for my own use. Subsequently I was induced to print 

 them, and they have now expanded to a large volume. "With all the care which has been 

 bestowed on them, I do not present them as a perfect and complete work, and 1 trust that 

 any omissions and errors may be pointed out to me. 



The Bibliographical Li.st of the JJnioiddce at the end of the volume will surprise the gen- 

 eral student by its enormous extent, comprising, as it does, aboiit eleven hundred references, 

 and yet I am i^erfectly aware that many works will be found to exist which have never come 

 under my notice." 



CONTENTS. 



Corrigenda et Addenda viii 



Synopsis of the Family IJnionidaB ix 



Division of the Family TJnionidae xxvi 



Genus Margaron - 25 



Subgenus Triquetra 25 



Subgenus Prisodon 27 



Subgenus Unio xiii, 28 



Subgenus Margaritana 67 



Subgenus Plagiodon 71 



Subgenus Monocondyloea 72 



Subgenus Dipsas 74 



Subgenus Anodonta 75 



Subgenus Columba 86 



Subgenus Byssanodonta 87 



Genus Platiris 88 



Subgenus Itidina 88 



Subgenus Spatha 89 



Subgenus Mycetopus 90 



Geographical Distribution of the Species of fhe Family Unionidse 93 



Genua Margaron 93 



Subgenus Triquetra '. ... 93 



Subgenus Prisodon 93 



Subgenus Unio 93 



Subgenus Margaritana 103 



Subgenus Plagiodon 104 



Subgenus Monocondylcea 104 



Subgenus Dipsas 104 



Subgenus Anodonta 104 



Subgenus Columba 107 



Subgenus Byssanodonta 107 



. Genus Platiris 108 



Subgenus Iridina 108 



Subgenus Spatha 108 



Subgenus Mycetopus 108 



Index of Species 108 



Alphabetical List of "Works referring to the Unionidae in this volume 149 



Chronological Bibliography of the Unionidas ; 157 



Appendix 183 



266. 



187L Lea, Isaac. Description of three new species of Exotic Unionidte. <^Froe. 

 Acad. Nat. ScL, Phila.. xxiii, p. 188. October, 1871. 



Read before the Academy of Natural Sciences .June 13, 1871, and ordered to be published 

 June 27, 1871. Presented to the meeting of the Academy October 24, 1871. (See Proc Acad. 

 Nat. Sci., Phila., xxiii, p. 6.) This forms part of No. 272. 



