CYCLEPTUS ELONGATUS. 



189 



" The pbaryngeal bones are strong, their anterior surface being flattened and the 

 itest diameter being the transverse one, as in Bubalichthys, and not laterally com- 



and thin as in Carpiodes and Ichthyobus. 

 "The symphysis is short and its peduncle flat and square, separated from the curved 

 ih by a deep semicircular emargination. The teeth are also stronger and stouter 

 lan in Carpiodes and Ichthyobus, as is also the case in Bubalichthys, and they are grad- 

 illy increasing in size, and relative thickness from the upper part of the arch to the 

 iphysis, but they are much fewer and farther apart than in the latter genus. Their 

 mer edge is transverse, rather blunt, though the middle ridge is somewhat project- 

 ig ; the lower teeth are so shaped that their inner angle is hardly higher than tho 

 iter, while in the middle aud upper teeth it is gradually more projecting, and from 



middle of the arch upwards forms a prominent point aiched outwards. 

 " The scales are considerably longer than high, with a rather prominent posterior mar- 

 in; numerous radiating furrows upon the anterior and posterior fields, some across 

 lateral fields; the concentric ridges of the posterior field are not only broader than 

 of the other fields, but instead of running parallel to the margin of the scales 

 3y are curved in concentric gothic arches between each two radiating furrows, 

 [eckel mentions this genus under the name of Ehytidostomus, but Rafinesque's name 

 leptus has the priority. Properly it ought to be called Leptocyclus, according to its 

 rmology, (see my Nomenclator Zoologicus ; Index Universalis, p. 109,) but under this 

 >rm nobody would recognise it as Rafinesque's name. I shall therefore not urge the 

 lange." (AGASSiz, Am. Journ. ScL Arts, 1855, p. 197.) 



CYCLEPTUS Copo & Jordan, 1877. "Body much elongated, subcylindrical forwards : 

 sal elongate, falciform, of 30 or more rays; fontanelle obliterated by the union of 

 parietal bones ; mouth small, inferior, with papillose lips." (JORDAN, Proc. Ac. 

 t.Sc.Phila.l87~,p.8L) 



ANALYSIS OP SPECIES OF CYCLEPTUS. 



Depth 4 to 5 in length : head 6 to 6 : eye small, 6 to 7 in length of head : longest 

 dorsal rays a little longer than head : pectorals rather longer than head : dorsal 

 rays 30 ; anal 7 or 8 : scales 9-56-7 : coloration very dark, the males almost black ; 

 size large; length of adult 1^ to 2| feet ELONGATUS, 42. 



42. CYCLEPTUS ELONGATUS (Le Sueur) Agassiz. 

 Black Horse. Gourd-seed Sucker. Missouri Sucker. Suckerel. 



517 Catostomus elongatus LE SUEUR, Journ. Ac. Nat. Sc. Phila. 103. 

 Catostomits elongatus RAFIXESQUE. Ich. Oh. CO, 1820. 

 Catostomus elongatus KIRTLAND, Rept. Zool. Ohio, 168, ia38. 

 Catostomus elongatus DEKAY, New York Fauna, part iv, Fishes, 203, 1842. 

 Catostomus elongatus CUVIER & VALENCIENNES, Hist. Nat. des Poiss. xvii, 455, 



1S44. 



Catostomus elongatus KIRTLAND, Boston Journ. Nat. Hist, v, 267, 1845. 

 Catostomus elongatus STORER, Synopsis, 422, 1846. 



Cycleptus elongatus AGASSIZ, Am. Journ. Sc. Arts, 2d series, six, 197, 1855. 

 Sclerognalhus elongatus GUNTHER, Cat. Fishes Brit. Mus. vii, 23, 18C8. 



