Jordan and Evermann. — Fishes of North Atnerica. 199 



on the sides of the muzzle ; the crease between the lips extends down on 

 the under side of the head. System of muciferous tubes well developed. 

 Pharyngeal bones about as in Moxosioma, rather weak, with numerous 

 email teeth. Body elongate, not much compressed, not elevated. Fins 

 moderate, formed as in Moxosioma. Scales large, as in Moxosioma, the 

 lateral line well developed and nearly straight, with about 45 scales in 

 its course. Air bladder in 3 parts. Sexual peculiarities little marked. 

 {layuxeiTiOQ, hare-lipped.) 



325. LAGOCHILA LACERA, Jordan & Brayton. 



(Hare-lip SrcKER; Cut-lips; Split-mouth Sucker; May Sucker; Eabbit-mouth Sucker; 

 Pea-lip Sucker.) 



Head short, conical, with lengthened snout, the region between the 

 eyes flattened and with prominent mucous ridges. Cheeks and lower 

 part of head rather swollen. Opercle much reduced, its greatest length 

 scarcely greater than the diameter of the eye. Head about 4| in length. 

 Eye 4i in length of bead, about 2 in length of the snout, its situation 

 thus quite posterior. Length of the top of the head 2| in the distance 

 from the snout to the base of the dorsal. Body rather slender, the form 

 much as in Moxosioma cerv'mum, the depth 4| in the length. Dorsal fin 

 rather low, its rays 12. A. 7 ; V. 9. Scales 5-45-5. Color olive or bluish, 

 brown above; sides and belly silvery ; lower fins faintly orange. Clear 

 streams of the Mississippi Valley, abundant only in the Ozark Mountains, 

 thus far known from the Scioto, Wabash, Clinch, Cumberland and Chick- 

 amauga rivers, and the White Riverof Arkansas. (lacer; torn.) 



Lagochila lacera, Jordan & Brayton, Proc. Ac. Nat. Sci. Phila., 1877, 280, Chickamauga 



River, Ringgold, Georgia. (Type, No. 31129. Coll. .Jordan .t Brayton.) 

 QuassUabia lacera, Jordan, Man. Vert., Ed. 2, 406, 1878; Jordan & Gilbert, Synopsis, U4, 1883. 



Supplemental Note on Catostomid.e. 



Chasmistes brevirostris, Cope, should apparently be transferred to the 

 genus Catostoinus, standing next to Catostomus fectindits, Cope, and Yar- 

 row. The two seem to constitute a distinct section, or subgenus (Lip- 

 omyzon, Cope), intermediate between Catostomus and Chasmisies. 



Family XXXVII. CYPRINIDiE. 



(The Carps.) 



Cyprinoid fishes with the margin of the upper jaw formed by the pre- 

 maxillaries alone and the lower pharyngeal bones well developed, falci- 

 form, nearly parallel with the giJl arches, each provided with 1 to 3 series 

 of teeth in small number, 4 to 7 in the main row, and a less number in the 

 others, if more are present. Head naked; body scaly (except in Meda and 

 Plagopterus, of North America, PhoxhicUus and Aidopi/ge, of Europe, and 

 a few others). Barbels 2 or 4 ; absent in most of our genera, and not large 

 in any. Belly iisuallj' rounded, rarely compressed, never serrated. Gill 

 openings moderate, the membranes broadly joined to the isthmus. Bran- 

 chiostegals always 3. Gills 4, a slit behind the fourth. Pseudobranchiie 



