REPOKT OF COMMISSIONER OF FISH AND FISHERIES. [18] 



165. Catostomus bernardini ' Girarrt. T. (136) 



166. Catostomus ardens Jordan & Gilbert. R. (139) 



167. Catostomus fecundus Cope & Yarrow. R. (140) 



168. Catostomus cypho Lockington. R. (141) 



169. Catostomus insignis" Baird & Girard. E. (142) 



170. Catostomus teres^ Mitcliill. R. (143) 



61.— HYPENTELIUM^ Ratiuesque. 



171. Hypentelium nigricans Le Sueur. Vw. (145) 



62.— CHASMISTE3 Jordan, (65) 



172. Chasmistes liorus Jordan. R. (140) 



173. Chasmistes brevirostris Cope T. (147) 



174. Chasmistes luxatus Cope. T. (148) 



175. Chasmistes cujus^ Cope. R, 



^ The type of Catostomus bernardini is closely related to C. occidenfalis, diftering 

 chiefly in the less conic form of the head and in the larger lower fins. Scales much 

 crowded forwards ; 31 before the dorsal (40 in C. occidentalis), 75 in the lateral line. 

 Fontanelle large ; lips broad, without cartilaginous sheath, formed as in C. occidentalis, 

 the lower deeply incised ; fins high, the dorsal longer than high, with 12 rays ; caudal 

 lobes equal ; head 4^ in length. 



'^ Catostomus insignis (type lately found) is closely related to C. teres, diflfering chiefly 

 in the broader upper lip, which has several rows of tubercles upon it. Fontanelle 

 rather small ; no cartilaginous sheath on lower lips ; scales considerably crowded 

 anteriorly, much more so than in C. clarki; 27 scales before dorsal; 56 in lateral line. 

 D. 11. 



'Called in the text, Catostomus commersoni. Although the Cyprinus commersoiii of 

 Lac^pMe is probably a sucker and may be this species, there is no certainty in so 

 identifying it, the description being very imperfect and the type said to have been 

 observed by Commerson in the East Indies ; a statement apparently derived from a 

 confusion of manuscripts of Commerson with those of Bosc. We think it better to 

 retain for this species the later name of teres, concerning which no doubt exists. To 

 this species apparently should be referred the small "June sucker" of the Adiron- 

 dacks, described by Mather as Catostomus utawana. Olivaceous, white below ; males 

 without red in the breeding season ; body slender ; head not small, flattened above ; 

 snout little prominent ; upper lip with two rows of papillae ; eye 4 in head ; 2 in snout; 

 dorsal as long as high ; pectorals nearly reaching front of dorsal ; head 4 ; D. 1,11; 

 A. 5 ; V. 9. Scales 9-67-8 ; length of adult 4^ inches. Blue Mountain Lakes, Adiron- 

 dack region. (Mather.) Apparently a mountain race of C <eres. (Mather. Twelfth 

 Rept., Survey Adirondack Region, N. Y., 35.) 



"This small fish I was at first disposed to consider as a dwarfed mountain form of 

 C. commersoni, but the fact that the latter fish is found in waters inhabited by this 

 species, and while it grows to a length of 12 or more inches there, this little sucker 

 barely reaches five. Added to this the fact that the larger species had finished spawn- 

 ing in the inlets in May, while this fish was found in masses in the swift mouutaiu 

 streams which tumble rapidly over rocks in the latter part of June, depositing their 

 eggs, thereby showing that they are adult fish." (Mather.) 



*In view of the peculiar form of the cranium in Catostomus nigricans, contrasting 

 with that seen in all the other Catosiomince, it is probably well to regard it as the type 

 of a distinct genus, Hypentelium Rafinesque. 



* Chasmistes cujus Cope. Couia. 



Pale olive; head broad and flat; upper lip very thin ; lower liji represented by 

 folds on each side, which do not connect around the symphysis ; eye Si in head ; in- 



