CYCLEPTUS ELONGATUS. 189 



" The pharyngeal boues are strong, their anterior surface being flattened and the 

 greatest diameter being the transverse one, as in I!nhaJichihys,iin(\. not laterally com- 

 pressed and thin as in Carpiodes and Ichthyobus. 



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

 arch by a deep semicircular emargiuation. The teeth are also stronger and stouter 

 than in Carpiodes and Ichthyobus, as is also the case in Bubalichlhys, and they are grad- 

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

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

 iuner edge is transverse, rather bluut, though the middle ridgo is somewhat project- 

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

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

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



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

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

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

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

 they are curved in concentric gothic arches between each two radiating furrows. 

 Heckel mentions this genus under the name of Ehyiidostomus, but Rafinesque's name 

 Cydeptus has the priority. Properly it ought to be called Leptocydus, according to its 

 etymology, (see my Nomenclator Zoologicus; Index Universalis, p. 109,) but under thii 

 form nobody would recognise it as Eafinesque's name. I shall therefore not urge the 

 change." — (Agassiz, Am, Joiirn. Sci. Arts, 1855, p. 197.) 



Cycleptus Cope, & Jordan, 1877. — "Body much elongated, subcylindrical forwards : 

 dorsal elongate, falciform, of 30 or more rays ; foutanelle obliterated by the union of 

 the parietal bones ; mouth small, inferior, with papillose lips." — (Jordan, Proc. Ac. 

 Xat. Sc. Phila. 1877, p. 81. ) 



ANALYSIS OF 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 bead : pectorals rather longer than head : dorsal 

 rays ^^0 ; anal 7 or 8 : scales 9-56-7 : coloration very dark, the males almost black ; 

 size large; length of adult H to 2^ feet elongatus, 42. 



42. CYCLEPTUS ELONGATUS {Le Sueur) Agassiz. 



Black Horse. Gourd-seed Suclcer. Missouri Sudcer. Suckerel. 



1817— Catostomus elouyatus Le Sueur, Journ. Ac. Nat. Sc. Phila. 103. 

 Catostomus elongatus Rafinesque. Ich. Oh. 60, 1820. 

 Catostomus elongatus Kirtland, Kept. Zool. Ohio, 168, 1838. 

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

 Catostomus elongatus Cuvier & Valenciennes, Hist. Nat. des Poiss. xvii, 455, 



1844. 

 Catostomus elongatus Kirtl.vnd, Boston Journ. Nat. Hist, v, 2G7, 1845. 

 Catostomus elongatus Storer, Syu -psis, 422, 1846. 



Cydeptus elongatus Agassiz, Am. Journ. Sc. Arts, 2d series, xix, 197, 1855. 

 Sclerognalhus elongatus GUntiier, Cat. Fishes Brit. Mus. vii,23, 1SC8. 



