46 



UNIO. 



S i 



OVAL. 



*Vaniixemii. Zea. Chenu. 



*constrictus. Con. 



*placitus. Lea. 



*buxetis. Lea. 



*coiicaviis. Lea. 



*sucTus. Lea. 



*radians. Lea. 



*difScilis. Lea. 



punicens. Hald. 



*Gou]clii. Lea. 



*de]odontus. Z«w?. Chenu. Llupe. 

 Han. 

 TInio ladeohis. Lea. D^Ori. 



*piger. Lea. 



*fabaceus. Lea. 



*Urugiiayensis. Lea. 



*apprimus. Lea. 



*MoTissonianiis. Lea. 



lutetis. Lea. BJan. 



*Monroensis. Lea. 



( OVAL. 



Fellmani. Desh. 

 *Binueyi. Lea. 

 *utriculus. Lea. 

 *lamellatus.' Lea. Chenu. Blan. 



CTiratus. Lea. 

 *viridiradiatus. Lea. 

 *coiisobrinus. Lea. 



Layardii. Blan. 

 *Menzieni.^ Oray. 



Keraudreni. Eyd. Blan. 

 *Ferussacianus. Lea. 

 *Delesserti. Bourg. 



eucirrus. Bourg. 



Bagdadensis. Bourg. 



*Vescoi. Bourg. 



Unio Swerzenbackii. Bourg. 



versus. Lea. 

 Unio inornatus? Han. Reeve. 



*contradens. Lea. Han. 



Unio Javanus. Lea. Chenu. 

 Unio exilis.? Dunk. 

 Unio mutatus. Mouss. 



' Blanford considers this a variety of niarginalis, but thej' are certainlj^ distinct. I have some from 

 Madras, and I doubt if Mr. B. has ever seen the species. 



^ This remarkablj' compressed species was given to me by Mr. McAndrews, of Liverpool, under this 

 name. I am not aware where Mr. Gray has described it. 



' Lwrnahts being preoccupied by me, I change this to versus, not being able to call it after Mr. 

 Ilanlej' or Mr. Eeeve, both names being preoccuf)ied by me. 



