66 



u K^ I o . 



Unio Nilssoni. Koch. 



Unio nucalis. Meek & Hay. 



Unio nuciformis. Ilihb. 



Unio Oriovacensis. Horn. 



Unio ortlionotus. Con. 



Unio ovalis. (Anthracosia, King) Turton. 



Unio paradoxus. Fisch. Bronn. 



Unio parallelns. Soiu. 



Unio penultimus. Gabb. 



Unio peregrinus. Phill. 



Unio petrosus. Mort. 



Unio phaseolus. Soiv. 



Unio Phillipsii. Williams. Bronn. 



Unio Pianensis. /S*. Wood. 



Unio pictorum. ic(?7i. 



Unio pinguis. Sand. 



Unio planus. Homer. Bronn. 



Unio porrectus. *S'oi4'. J/a?z<. 



Unio primigenius. Con. 



Unio prisons. Meek & Hayden. 



Unio problematicus. Klip. Bronn. 



Unio radiatoides. Zea. 



Unio Eoanokoides. Lea. 



Unio robustus. Soto. 



Unio Eomeri. Dunk. Bronn. 



Unio rostratus. ^S*. TUood 



Unio Eouxii. Noul. 



Unio saxulum. i/br^. 



Unio Slavonicus. Horn. 



Unio Solandri. Soiu. Flem. 



Unio splenclens. Goldf. Bronn. 



Unio Staffinensis. Forbes. 



Unio striatus. Ooldf. Bronn. 



Unio Stricklandii. P/u7Z. 



Unio strictiplicatus. iVoi/J. 



Unio Sturi. Horn. 



Unio subconstrictus. (Antbracosia, King.) 



Sow. Flem-. 

 Unio subporrectus. Romer. Bronn. 

 Unio subrotundoides. iea. 



Unio subrugosus. Matlie. Bronn. 



Unio subsinuatus. Koch. 



Unio subspatulatus. J/ee/;; & Hayden. 



Unio subtetragonus. /S*. Wood. 



Unio subtriangularis. Brown. 



Unio subtrigonus. Z>es/i. Bronn. 



Unio subtruncatus. Fitton. 



Unio subtumidus.i JD^Orb. 



Unio sulcatus. Fichw. Bronn. 



Unio suprajurensis. Homer. Bronn. 



Unio tellinarius. Goldf uss. 



Unio terrenus. Jfbri. 



Unio Toulouzanii. Mathe. Bronn. 



Unio transversalis. J/. & /Serr. 



Unio transversus. Brown. 



Unio trigonus.^ Romer. Koch. 



Unio truncatosa. J/{c/i. 



Unio tumidus. ^oty. 



Unio tumulatis. Mort. 



Unio turgida (Carbonicola). J/' Coy. 



Unio umbonatus. i^wc/i. Bronn. 



Unio uniformis. x^ow. i^'Zejw. 



Unio Urii. Flem. 



Unio Valdensis. Mantell. 



Unio ventricosus. Bouil. Bronn. 



Unio Verse-Pacis. Tristram. 



Unio vetusta. Jfee/i;. 



Unio Voltzii. ^oc/i. 



Unio Vukontinovici. Horn. 



Unio "Walteri. Ifawif. Bronn. 



Unio Wetzeleri. Dunk? 



Unio Zelebori. iZb'rw. 



Unio . Sow.*' 



DesLayes, Trait. Flem., vol. ii. p. 215, saj^s 

 M. ISToulet found, in the Middle Tertiary of the 

 Sub-Pyrenean basin, nineteen species of fossil 

 Uniones; but he does not give their names, nor 

 the work of M. Noulet. 



1 D'Orbigny's Prod. Palaeonto., vol. ii. p. 306, substitutes subtumidus for tumidus, Sow., it beino- pre- 

 occupied. ° 



'- U. trigonus was described by Romer in Nord. Ool. 1836. I published my trigonus in Trans. Am. 

 Phil. 1831, and therefore have precedence. 



"" In Pictet, Traits, vol. ill. p. 529. 



' Referred to by figure in 3Iag. Nat. Hist., vol. ii. p. 617. It has the form of littoralis, and is found 

 at "Gray's." 



