CYCLEPTUS ELONGATUS. 189 



" The pharyngeal boues arc strong, their anterior surface being flattened anrl the 

 greatest diameter being the transverse one, as in IjithalichthySjiiud not laterally com- 

 pressed and thiu as in Carpiodes and Ichthyobiis. 



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

 arch bj' a deep semicircular emargination. The teeth are also stronger and stouter 

 than in Carpiodes and Ichthyohits, as is also the case in Buhalicliihyii, 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 

 inner edge is transverse, rather blunt, though the middle ridgo is somewhat project- 

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

 outer, while in the middle and upper teeth it is gradually more i)r(>jecting, and from 

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



"The scales arc 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 postei'ior 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 Bliyiidostomua, but Rafinesque's name 

 Cycleptus has the priority. Projierly it ought to be called Lcptocyclus, according to its 

 etymology, (see mj' Nomenclator Zoologicus ; Index Universalis, p. 109,) but under thin 

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

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



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

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

 the parietal bones; mouth small, inferior, with i)apillose lips." — (Joijdan, Froc. Ac. 

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



ANALYSIS OF SPECIES OF CYCLEPTUS. 



• Depth 4 to 5 in length : head G to 6^ : eye small, G 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 H to 2^ feet elongatus, 42. 



42. CYCLEPTUS ELONGATUS {Le Sueur) Agassiz. 



Black Horse. Gourd-seed Snclcer. Missotiri Sucler. Suckerel. 



1817 — Catostomiis eloiigatus Le Sukup., Journ. Ac. Nat. Sc. Phila. 103. 

 Catoslomus tlongatus Rafixesque. Ich. Oh. GO, 1820. 

 Catostomus elongatus Kiutland, Rept. Zool. Ohio, 1G8, 183S. 

 Catostomns cloiiijatits DeKay, New York Fauna, part iv, Fishes, 203, 1842. 

 Catostomus vlonyatus Cuvieu & Valenciennes, Hist. Nat. des Poiss. xvii, 455, 



1844. 

 Catostomus clongatus Kiutland, Boston Journ. Nat. Hist. v,2G7, 1845. 

 Catostomus clongatus Stokei;, Sympsis, 422, 184G. 



Cycleptus clongatus Agassiz, Am. Journ. Sc. Arts, 2d saries, xix, 197, 1855. 

 Sclerognalhus clongatus Gt'NTiiEH, Cat. Fishes Brit. Mus. vii, 23, 18C8. 



