64 



UNIO. 



Unio PfeifFeri. Dimker. 

 Unio Philippii. Dup. 

 Unio pinax. Ben. 

 Unio plagiosoma. Ben. 

 Unio planivalvis. Morelet. 

 Unio plombarivxs. Villa. 

 Unio porrectns. Co7i. 

 Unio prasinatus. Con. 

 Unio preciosus. Fer. 

 Unio pruneostis. Zie(j. 

 Unio psoricus. Morelet. 

 Unio Pugio. ^e?z. i?/aM. 

 Unio pulchellus. Fer. 

 Unio purpuriatus. >S'a?/. 

 Unio radula. Ben. Blcin. 

 Unio rectilinearis. Sow. 

 Unio Eeyniesii. J/tc/i. 

 Unio Eothi. Boiirg. 

 Unio Eousii. Bnj). 

 Unio rugosus. Anton. 

 Unio Schlegelii. Martens. 

 Unio Schwerzenbachii. Bourg. 

 Unio Scobina. i?em. Blan. 

 Unio scutnlatus. Morelet. 

 Unio scntum. /S'oiy. Reeve. 

 Unio semiplicatus. Troschel. 

 Unio semiquadrata. a^om;. 

 Unio Seneltensis. (?ass. 

 Unio Sennaarensis. Alisi!. 

 Unio simonis. ^ri's^;. 

 Unio Sitifensis. Morch. 

 Unio smaragdites. i?e«. 

 Unio solidnlus. Phili. 

 Unio spheniopsis. Morelet. 

 Unio Steveniana. Krynicld. 



Unio Tamnilapanus. Ccrt. 



Unio testudineus. Morelet. 



Unio testudinarius. Sjxng. 



Unio Tbeca. ^en. 5Za«. 



Unio triembolus. ^e?i. 



Unio trirostris. i?ew. 



Unio truncatosus. Potier. 



Unio truncatus. Speng. 



Unio uber. Con. 



Unio Valdivianus. Phili. 



Unio venustus.' J/ore. 



Unio vellicatus. Reeve. 



Unio Teylieri. Menke. 



Unio Zimermani. Stentz. Potier.^ 



Unio ■ . Adams. 



The following species are from tlie Cretaceous, 

 Tertiary, &c.: — 



Unio abbreviatus.^ Goldfuss. 



Unio abductus. Phili. 



Unio acutus. (Antliracosta. King.") Sow. 



Flem. 

 Unio aduncus. Soiu. Mart. 

 Unio agTestis. Broivn. 

 Unio alseformis. Broiun. 

 Unio alatoides. iea. 

 Unio Alpinns. Matlie. Broivn. 

 Unio ambiguus. Soio. 

 Unio amygdala. Brown. 

 Unio angustatus. Bronn. Mus. Stras- 



burg. 

 Unio anodontodes. N'oul. 

 Unio Ansticei. (Myacites. Bronn.) Soto. 



1 This name being preoccupied by me, and the name of Morelet being already used by Deshayes, I 

 propose the name of oblitus for it. 



= Deshayes, in Jacquemont's Voy. to India., t. xviii. Pig. 3, gives an Iridina (new), and the Unio 

 coj-rugatus, marginalis and cce.ruleus ? without names or descriptions 1 



In a catalogue of fresh water and land shells, Ferussac says that a Unio (species uncertain) was 

 found in Berg River near the Cape of Good Hope. 



' M. De Koninck, Foss. de Carb. de Belgique, has made a new genus (Cardinia) in which he places 

 abbreviatus, robustus, carbonarius, antiquus, subconstrictus, uniformis, acutus, atratus, phaseolus, and 

 tellinarius. Pictet, in Traite Palseontologie, says he has never found the family anterior to the Wealden, 

 V. iii. p. 528. 



* Mr. King formed this genus in 1844, for the Uniones of the Coal Formation. It is supposed there 

 are forty species known. 



