172 PROCEEDINGS OF THE ACADEMY OP 



Unio quadratus. Testa laevi, quadrata, compressa, ad latere planulata, 

 inaequilaterali, postice obtuse biangulata ; valvulis subcrassis ; natibus promi- 

 nulis ; epidermide vel rufo-fusca vel tenebroso-fusca et obsolete radiata ; denti- 

 bus cardinalibus subcrassis, corapresso-conicis, crenulatis. in utroque valvulo 

 duplicibus ; lateralibus longis, lamellatis, crassis curvisque ; margarita, vel 

 alba, vel purpurascente et iridescente. 



Hab. Carter's Creek. J. Postell ; and Factory Creek, Georgia. G. Hal- 

 lenbeck. 



Catalogue of Birds collected on the Rivers Camma and Ogobai, Western Africa, 

 by Mr. P. B. Duchaillu, in 1858, with notes and descriptions of new species. 



BY JOHN CASSIN. 



[Concluded.] 



197. Ncmida plumifera, Cassin. 



Numida plumifera, Cassin, Proc. Acad. Philada. 1856, p. 321. 



Journ. Acad. Philada. iv. pi. 2. 



Specimens of both sexes in the present collection have the head quite naked, 

 and appear to be in older plumage, than those described by me and figured as 

 above. They do not differ, however, in any important character. From the Og- 

 obai and Rembo. 



198. Phasidus niger, Cassin. 



Phasidus niger, Cassin, Proc. Acad. Philada. 1856, p. 322. 

 Journ. Acad. Philada. iv. pi. 3. 



Specimens quite similar to that described by me, and figured as above. From 

 the Camma and Ogobai. 



199. Francolinus squamatus, Cassin. 



Francolinus squamatus, Cassin, Proc. Acad. Philada. 1856, p. 321. 

 The only species of this genus received in Mr. Duchaillu's collections. From 

 the Ogobai, and formerly from the Moonda and Cape Lopez. 

 Related to F. ahantensis, Schlegel, Beydr. Dierk. pi. 14, but distinct. 



200. Peliperdix Lathami, (Hartlaub). 



Francolinus Lathami, Hartl. Cab. Jour. 1855, p. 210. 

 Francolinus Peli, Schlegel, Beydr. Dierk. i, p. 50, pi. 15. 



Numerous specimens of this little known and handsome bird are from the 

 Camma and Ogobai. This is a very changeable species in its specific charac- 

 ters, especially in the markings of the under parts and the shade of color of the 

 upper, and I am not quite sure that there are not two species in the present 

 collection. The most obvious variation is in the size of the white circular and 

 cordate spots on the under part of the body ; usually these are small and ter- 

 minal, but specimens occur, of both sexes, in which they are large, and enclose 

 a spot of black. 



Prof. Schlegel's beautiful plate of this bird, cited above, represents it as 

 lighter colored on the upper parts than is usual in the collections of Mr. Du- 

 chaillu. 



201. Synoicus Adansonii, (Verreaux). 



Ooturnix Adansonii, Ver. Rev. et Mag. Zool. 1851, p. 515. 

 One specimen only of this little species from the Ogobai, which is a female, 

 but readily identified from M. Verreaux's types in the Acad. Mus. This hand- 

 some little bird is strongly allied to the other species of the genus Synoicus, 

 Gould, and resembles several of them in general appearance. 



202. Oedicnemus senegalensis, Swainson. 



Oedicnemus senegalensis, Swains. B. of W. Afr. ii. p. 128, (1837). 



[June, 



