478 
ACTINOPTERYGir. 
1834. Anenchelum latum, L. Agassiz, ibid. p. 302 (name only). 
1834. Anenchelum isopleurum, L. Agassiz, ibid. p. 302 (name oulj). 
1834. Anenchelum heteropleurum, L. Agassiz, p.^02 (name only). 
1842-44. Anenchelum glarisianum, L. Agassiz, Poiss. Foss. yoI. v. pt. i. 
p. 70, pi. xxxvii. figs. 1, 2. 
1842-44. Anenchelum isopleurum, L. Agassiz, ibid. p. 71, pi. xxxvii. 
fig. 3. [Immature distorted fisli; Britisli Museum.] 
1842-44. Anenchelum dorsale, L. Agassiz, ibid. p. 72, pi. xxxvii. fig. 4, 
pi. xxxvii a. figs. 1, 2. [Fragmentary distorted specimen ; British 
Museum.] 
1842-44. Anenchelum heteropleurum, L. Agassiz, ibid. p. 73, pi. xxxvii a. 
fig. 3. [Distorted large fish; British Museum.] 
1842-44. Anenchelum latum, L. Agassiz, ibid. p. 74, pi. xxxvi. [Im¬ 
perfect anterior half of fish ; Zurich Museum.] 
(:') 1844. Anenchelum longipenne, L. Agassiz, ibid. p. 74 (name only). 
(?) 1847-48. Anenchelum breviceps, C. G. Giebel, Neues Jahrh. 1847, 
p. 665, and Fauna d. Vorw., Fische, p. 80, [Imperfect distorted 
fish ; University Geological Museum, Halle.] 
1859. Anenchelum latum, G. vom Rath, Zeitschr. deutsch. geol. Ges. 
vol. xi. p. 122, pi. iii. fig. 6, pi. iv. 
1859. Anenchelum dorsale, G. vom Rath, ibid. p. 122, pi. iii. fig. 8. 
1869. Anenchelum glarisianum, G. vom Rath, ibid. p. 122, pi. iii, fig. 5. 
1859. Anenchelum heteropleurum, G. vom Rath, ibid. p. 123. 
(?) 1859. Anenchelum breviceps, G. vom Rath, ibid. p. 123. 
1859. Anenchelum isopAeurum, G. vom Rath, ibid. p. 123. 
1886. Lepidopus glaronensis, A. Wettstein, Fischfauna Tertiaer. 
Glarnerschief. (Denkschr. schvveiz. Palaeont. Ges. vol. xiii.), 
p. 42, pi. V. figs. 1, 3, 5, 9, 10, pi. vi. figs. 1, 3, 5-8. 
Type. Imperfect fish. 
A slender species attaining a length of over one metre. Length 
of head with opercular apparatus contained eight times, maximum 
depth of trunk about nineteen times in the total length of the fish 
to the base of the caudal fin. About 12 teeth on the margin of 
each jaw above and below ; one enlarged at anterior end of pre¬ 
maxilla ; those of middle of dentary twice as high as those in front 
and behind ; the largest more or less recurved. Vertebrae 32 to 35 
in the abdominal, 72 to 75 in the caudal region. Pectoral fins un¬ 
usually large, the length of the two lowest rays equalling twice the 
depth of the trunk ; dorsal fin arising above first vertebra, termina¬ 
ting over sixth from caudal fin, and its anterior 10 or 12 rays the 
longest; anal fin terminating opposite end of dorsal; caudal fin 
larger than in the existing species. 
This is the tj^pe species of Anenchelum. The known examples 
are very variously distorted, and it is difficult to determine its 
exact proportions. 
Form. ^ Loc. Oligocene : Canton Glarus, Switzerland. 
•’ i-v'O , 
