UN 10. 



31 



y. 



c 



H 



OVAL. 



MI/II (Itiilitnna. Lin. Schreil). 



Unio spuria. Lam. 



Unio triradiata. MSS. in Museum at 



Paris. 



Unio fulmineus. Phili. 

 Potamida corruyata. Swain. 

 Ndia corruyata. Swain. 



Burtoni. Woodw. Reeve. 

 Indicus. Sow. Reeve. 



*Tavoyensis. Gould. Blan. 

 Unio parma. Ben. 



*crespisulcatus. Ben. Blan. 

 *occatus. Lea. Blan. 

 *asperulus. Lea. 



*plioiferus. Lea. Chenu. Han. 

 Unio carlonarius. 1 Lea. Chenu. 

 Unio plexus. Con. 

 Unio crocodilorum. More. 



*rusticus. Lea. Mart. 



diminutus. Lea. 

 *laticostatus. Lea. 

 *kippopseus. Lea. 



OBLOKO. 



*SlostUUltUL Lea. Chenu. 

 Unio aralus. Con. 

 Unio plectoforus. Con. 



*rufofuscus. Lea. 

 navigioliformis. Lea. 

 plicatulus. Lea. 



hylaeus. D'Orb. Schom. 

 Unio Ouarianus. 



*trapezoides. Lea. Chenu. linn. 

 Unio crassidens. Lam. Var. a. 

 Unio inlerruptus. 1 Say. 



Homsensis. Lea. 



SUBROTUXD. 



*Brazosensis. Lea. 



*Lincecumii. Lea. 



WIDE. 



*ellipticus. Spix. Mori. 

 Diplodon elfipticum. 3 

 I ii to multistriatus. Lea. D'Orb. 



Han. 

 Unio psammactinus. Phili. 



*Japanensis. Lea. 

 *cucumoides. Lea. Clf 



I'ni'n Ciinniijii. Dunk.* 



1 U. carbonariua is the old arid eroded of /y//V- 



* Mr. Say, in his "Synonymy," claims precedence in this species, although my Memoir bears date 

 May, 1830, while his is December, 1831. (See Tran^i/h-iuna Juiiriinl. vol. v.) The reader will nut. alter 

 this, be surprised to be told that Mr. Say does not allow me, in his very incorrect "Synonymy," to be the 

 discoverer of a single new species of Uuio from our western waters!! I may be allowed also to state, that 

 I do not understand why he gives the same name to two of his different numbers: thus, he calls No. IT, 

 U. interruptus, Kafin.; and No. 47, U. in/crni/iti/*, S:iy. The S()ecies are evidently distinct. 



' I have no doubt of D. elliplicum being the same with my / '/<>" iniilti.-tfriiifuif-j and it is a true 

 Mr. Barnes gave the same specific name to an American (W", but it had been previously described by 

 Lamarck as liyamrntinux. 



4 Comes from Richmond River, Australia. Zeitschrift fiir Malak.. l^ti, p. 10P. 



