18S5.] PROCEEDINGS OF UNITED STATES NATIONAL MUSEUM. 13 



1. Iiepidosteus osseus, L. 



2. Leptops olivaris, Kafinesque. Flat-head Cat. 



3. Amiurus melas, Eafinesqne. 



4. Amiurus uatalis, Rafinesque. ' 



5. Ictaltirus punctatus, Rafiueeque. 



6. Ictalurus furcatus, Raiiuesque. 



7. Ictiobus cyprinella, Cuv. & Val. Common Buffalo. 



8. Ictiobus urus, Agassiz. Razor-back Buffalo. 



9. Ictiobus bubalus, Rafiueeque. Sucker-mouth Buffalo. 



There appear to be three species represented among the Buflfalo fishes 

 taken at Saint Joseph, and these seem to correspond to the three spe- 

 cies given in the Synopsis Fish. N. A. The whole group is much in 

 need of thorough revision, but sufficient material does not yet exist in 

 any collection. I. bubalus can generally be distinguished, but we can- 

 not yet discriminate the young of I. cyprinella and I. urus, and more 

 than three species may perhaps exist. 



10. Ictiobus carpio, Rafinesque (35883). 



A specimen 1 foot long is rather dusky in color. Head, 4f in length; 

 depth, 3^^; the form, subfusiform; the back somewhat arched behiud 

 nape ; anterior rays of dorsal about half length of the fin ; eye about 

 4^ in head ; muzzle short, rather conic, somewhat projecting ; D. 27 ; 

 scales, 40-14 ; opercle, coarsely striate. 



11. Hybognathus nuchalis placita, Girard. 



We have compared our specimens with the original types of Hybog- 

 nathus pUtcita and can find no differences. The specimens look some- 

 what unlike the ordinary nuchalis, but no difference of importance 

 seems to exist. The eye in placita is a little smaller than the average 

 in nuchalis, the sides are more silvery, and the caudal peduncle possi- 

 bly a little deeper. 



12. Notropis deliciosus, Girard. 



Described from Saint Joseph as Hybopsis missuriensis, Cope. 



13. Platygobio gracilis, Richardson. 



Abundant in the current of the river. Platygobio pallidus, Ffrbes^ 

 (Synopsis Fish. N. A., 220) is probably the young of this species. 



14. Hybopsis gelidus, Girard. 

 Abundant in the river channel. 



In life Gverywhere very pale, the sides silvery, without dark spots or 

 punctulatious, the lower lobe of the caudal blackish. 



Head, 4 in length ; depth, 5^ ; Lat. 1. 44 ; length, 2 inches. 



Body slender, somewhat compressed. Head short, spongy in texture, 

 it8 anterior profile bluntish, the thick snout overhanging the mouth. 

 Mouth rather large, slightly oblique, the lower jaw included. Maxillary 



