39. EEICYJIBA. 185 



ventrals. A dark dorsal stripe from ihc nape to the caudal ; a 

 greyish, diffuse, longitudinal band above the lateral line. Pharyngeal 

 teeth 4—4. 



Illinois ; Iowa ; Missouri. 



a-h. Adult. From Dr. ParneU's Collection. 



6. Young, 1| inch luug. Burlington, Iowa. Presented by Th. Moore, 

 Es*q. 



2. Hybognathus regius. 

 Hybognathus regius, Girard, 1 roc. Ac, Nnt. Sc. Philad. 185G, p. 209. 

 D, 11. A. 11. L. lat. 38. L. transv. 6/ ?. 

 Body elongated, compressed, its depth being one-fifth or rather 

 less than one-fifth of thu total length (without caudal) ; the length 

 of the head is one-sixth of the total. Mouth quite small. Origin of 

 the dorsal fin a little anterior to that of he ventrals, and nearer to 

 the tip of the snout than the base of the central rays of the caiulal. 

 There are four longitudinal series of scales between the lateral liuc 

 and the root of the ventral. Coloration uniform. (Girard.) 

 Pharyngeal teeth 4 — 4. 

 Maryland, U. S. 



3. Hybognathus perspicuus. 



Hvborh}'Tichus perspicuus, Girard, Proc. Ac. Nat. Sc. Philad. lf^56, 

 "p. 179 ; or U. St. ^ Pac. R. R. Exped. Fish. p. 231, pi. 52. ligs. l(;-20. 



D. 11. A. 9. 



Scales of moderate size. The height of the body equals the length 

 of the head, which is a little less than one-fourth of the total length 

 (without caudal). Snout not longer ihan the large eye, which is 

 about one-third of the length of the head. The origin of the dorsal 

 fin is opposite to that of the ventrals, and appears to be a little nearer 

 to the end of the snout than to the root of the caudal fin. A black 

 spot at the base of the caudal and on +be anterior margin of the 

 dorsal. {Girard.) 



Arkansas Eiver. 



39. ERICYMBA. 



Ericymba, Cope^ Proc. Ac. Nat. Sc. Philad. 1866, p. 87. 

 Scales of moderate size ; lateral line complete. Dorsal fin short, 

 without spine, not in advance of ventrals. Anal fin short ; mouth 

 inferior: intermaxillaries protractile; barbels none; mandibulary 

 and opercular bones with external muciferous cavities separated by 

 septary laminse. Pharyngeal teeth hooked 4 . 1 — . 4. 

 United States. 



1. Ericymba buccata. 

 Cope, I. c, and Journ. Ac. Nat. Sc. Philad. xiii. p. 361, pi. 13. fig. 4. 

 D. 9. A. 9. V. 8. L. lat. 33. L. transv. 5/?. 

 The height of the body is contained nearly five times in the total 

 length (without cauual), the length of the boad thrice and five- 



