162 Cochercll and AUison. — The Scales of American Cyprinidge. 



Nuclear area broad, apical radii almost parallel; inner apical cironli 



angulate Nocomis kentuckiensis (Rafinesque). 



■Stone R., Tenn. 

 Nuclear area narrow, apical radii convergent 1. 



1. Scale very large, more than oA mm. broad and long; radii 14 to Ki 



(about 11 complete) Hyhopsis storerianus {KhiX&nd). 



Red Lake River, Crookston, Minn. 

 Scale .smaller 2. 



2. Apical radii numerous, about 16 to 25 (in this resembling kentuck- 



iensis), but only about 10 complete; most of the scales ridged like 

 lateral line scales; circuli not in the least angled ajjically 



H. gclldus (Girard). 

 Platte R., Grand Is., Neb. 

 Apical radii fewer than 1(> 3. 



3. Scale relatively firm, closely and distinctly sculptured; basal area 



larger ; radii 10 or 11, no short inner ones; distance between radii 

 not so great as in watanga, but considerably greater than in gelidus 



H. alius (Jordan). 

 Salamanca, Mexico. 

 Scales relatively thin, feebly sculptured, with the apical radii far 

 apart 4. 



4. Sculpture more distinct; radii to 14, broad, so that they appear as 



double lines under the microscope 



H. watauga Jordan ct Evennann. 

 Tippecanoe R., Belong, Indiana. 

 Very thin scale, with weakest sculpture; radii short and irregular 



IF. amblop!^ (Rafinesque). 

 Wolf R., Tenn. 

 Hybopsis gelidus does not accord with the subgenus Erimystax; it may 

 be regarded as the type of a new subgenus Macrhybopsis, the name sug- 

 gested by the elongated form. 



Semotiius Rafinesque. 



S. atromaculatus (]\Iitcliill) has the apical radii very luunerous (20 to 

 25), whereas in »S'. corporalis (Mitchill) they are fewer (12 to 15). 



Ericymba buccata Cope. 



This curious little lisii (ours from Wild Cat Creek, Indiana), has a 

 broad scale, somewhat triangular in form, with al)Out 10 apical radii. 

 The scales, however, difler much in shajie on different parts of the body. 

 A lateral line scale from caudal ))eduncle is approximately round; while 

 a subdorsal scale from al)out 5 nun. anterior to the dorsal lin is very 

 broad, with 22 nearly parallel radii going to a very broad nuclear area. 



The circuli are broadly depressed in the apical middle, in the general 

 manner of Plychochellus, not in the least angulate. 



According to the scales, with due regard also to otiier characters, the 



