. Notes on the North American ganoids [microform] : Amia, Lepidosteus, Acipenser, and Polyodon, with three plates. Ganoidei; Fishes; Ganoide; Poissons. -^.^.^,^, r\.: ,mmr m-^^ ^"^^i^M .^; n. WATURAL niSTORT. 117 lily tlint tlio tnilM of It'lerowical, it U not I of Amia nIioiiIiI l)t>. Ill CiiviiT IiikJ pIlKJcd I'V'''. ^iKpiihirhjindt«/», |f)iiioi!crc(il «« tlioso of >vc limy siii)|»oHc to |"t, distinctly lictero- '»y tlio clinngofl which y (15) and ua lately nils rod (called nolo- it upward hnt also M Lppithatum. \\y\\, niys the end of the ••^y, to the posterior condition
. Notes on the North American ganoids [microform] : Amia, Lepidosteus, Acipenser, and Polyodon, with three plates. Ganoidei; Fishes; Ganoide; Poissons. -^.^.^,^, r\.: ,mmr m-^^ ^"^^i^M .^; n. WATURAL niSTORT. 117 lily tlint tlio tnilM of It'lerowical, it U not I of Amia nIioiiIiI l)t>. Ill CiiviiT IiikJ pIlKJcd I'V'''. ^iKpiihirhjindt«/», |f)iiioi!crc(il «« tlioso of >vc limy siii)|»oHc to |"t, distinctly lictero- '»y tlio clinngofl which y (15) and ua lately nils rod (called nolo- it upward hnt also M Lppithatum. \\y\\, niys the end of the ••^y, to the posterior condition of tiiingg tftil docs not simply ictiially overlaps it; •esentcd by tlie tails IS lias been nircady of Ganoids, general an evident Iioniocorcal or fan- the progress of the us 80 far ns already 3al parallel to the ilier condition here •ison to the proto- it known fishes and Jbrates or manifest ' have received the FINS OK Amia and the name Sarchi- % p. 418. run bccauNO the pectorals consisted of a memlirano rising (Voiu a fleshy lobe. Agassiz (9, 360; 8, 5R) has shown that tills form of pectoral la ciiaractoristic of the young Lvjiiiti)nteug. Dumorll (i, 320) rpiotos Agassiz' observations but makes no comment noon them. No other systematic work, so fur as I know, contains any rcferonco to the fact. Since Iluxloy (6, 24), has proposed a now sub-order of Ganoids, Crossopterygla, mainly "in consideration of the peculiar manner in wliicli the fin rays of tlio paired fins (tlio pectorals and usually tlio vcntrals) are arranged so as to form a fringe round a central lobe," it is desirable to ascertain whotlier the early stages of othor Ganoids exhibit similar features. This is certainly thn case witli all the young Lepidosteus above described, including the largest. Moreover, in any minute de- scription of the adult L. platyatomus, the pectoral fins would be distinguished from tho ventrals by the existence of a dccidod fleshy rounded lobe at their base. In the s
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Keywords: ., bookcentury1800, bookdecade1870, booksubjectfishes, bookyear1876
