286 PROCEEDINGS OF THE ACADEMY OP 



in utroque valvulo duplicibus ; lateralibus longis subrectisque ; margarita vel 

 alba vel aurea et valde iridescente. 



Hab. Tigris River, near Mardin Pashalic of Orpha, Asiatic Turkey. C. M. 

 Wheatley. 



Unio Mardinensis. Testa laevi, suboblorga, incequilaferali, antice rotundata, 

 postice obtuse angulata, ; valvulis subtenuibus, antice crassioribus ; natibus 

 prorainulis, ad apices crebre et minute undulatis ; epidermide luteola, valdd 

 radiata ; dentibus cardinalibus parvis, acuminatis crenulatisque ; lateralibus 

 6ublongis subrectisque ; margarita aurea et valde iridescente. 



Hab. Tigris River, near Mardin, Asiatic Turkey. C. M. Wheatley. 



Unio Emesaensis. Testa, laevi, subrotunda, inaequilaterali, ad utnbones sub- 

 tumida, antice rotundata, postice obtuse subbiangulata ; valvulis crassiusculis, 

 antice aliquanto crassioribus ; natibus prominentibus, ad apices corrugatis ; 

 epidermide rufo-fusca et obsolete radiata. ; dentibus cardinalibus subcrassis 

 crenulatisque ; lateralibus brevibus subrectisque ; margarita aurea et valde 

 iridescente. 



Hab. Lake Horns, River Orontes, North Syria. C. M. Wheatley. 



MoNOCONDYLOiA Makdinensis. Testa laevi, arcuata, valde inaequilaterali, ad 

 latere compressa, antice et postice rotundata ; valvulis crassiusculis, amice 

 crassioribus ; natibus subprominentibus, recurvis, ad apices minute undulatis ; 

 epidermide tenebroso-fusca, ; dentibus cardinalibus parvis, erectis compressis- 

 que; margarita caeruleo-alba, et iridescente. 



Hab Near Mardin, in a stream falling into the Tigris River, Asia. C. M. 

 Wheatley. 



Notes on some Species of BIRDS from South America. 



BY JOHN CASSIN. 



I. Calliste Laving, Cassin, (Plate 1, fig. I.) 



Calliste Laviniae, Cass. Proc. Acad. Philada., 1858, p. 178. 



This bird was described by me as above from a specimen procured in New 

 Grenada, and which is yet the only adult that I have seen. In the museum 

 of the Smithsonian Institution there is another specimen from the mountain 

 region of the Rio Truando, a tributary of the Rio Atrato, New Grenada. The 

 latter specimen is not in mature plumage, but has the outer webs of the quills 

 and the greater coverts of the rufous-orange color, which, on those parts, so 

 strongly characterizes this species, and distinguishes it at once from its allies 

 of the subgroup Gyrola. The adult bird is represented of the natural size, in 

 plate 1, fig. 1, of the present volume. 



Of this group or subgenus Gyrola, four species are now known, which, 

 though resembling each other in general colors, may be readily distinguished, 

 and inhabit, apparently, distinct regions. 



These species are : 



1. Calliste Gyrola, (Linnaeus.) 



Fringilla Gyrola, Linn., Syst. Nat. i. p. 181 (1758.) 



2. Calliste Gyroloides, (Lafresnaye.) 



Aglaia Gyroloides, Lafres., Rev. Zool. 1847, p. 277. 



3. Calliste Desmarestii, G. R. Gray. 



Calliste Desmarestii, G. R. Gray, Gen. ii. p. 366 (1844.) 



4. Calliste Lavini^, Cassin. 



Calliste Lavinia, Cass., Proc. Acad. Philada., 1858, p. 178. 



[Dec. 



