PERCID2E. 
501 
than the others, which are nearly equal in size ; pelvic and third 
a nal fin-spines as long as the hiuderraost dorsal spine. 
Form, if Loc. Oligocene : Canton Glarus, Switzerland. 
1956, P. 3934. Fragmentary fish in counterpart, displaying the 
characteristic anal fin-spines, erroneously labelled Acanus 
oblongus by Agassiz and apparently noticed tom. oil. 
p. 126 ; Engi. Egerlon if Enniskillen Colls. 
Acaims regleysianus (Blainville). 
1618. Zens regleysianus , H. 1). de Blainville, Nouv. Diet. dHist. A at, 
vol. xxvii. p. 316. 
1818. Zeus platessa, H. D. de Blainville, ibid. p. 317. [Imperfect fish ; 
dim Brongniart Collection.] 
1838-39. Acanus regley , L. Agassiz, Poiss. Foss. vol. iv. pp. 5, 125, 
pi. xvi. fig. 2. 
1838-39. Acanus oblongux, L. Agassiz, ibid. pp. 5, 126, pi. xvi. fig. 3. 
[Imperfect fish ; Neuehatel Museum.] 
1838-39. Acanus arcuatus, L. Agassiz, ibid. pp. 5, 127. [Imperfect 
fish ; British Museum.] 
1886. Acanus regley , A. Wettstein, Fischfauna Tertiaer. Glamer- 
schief. p. 65, pi. iii. figs. 4, 7. 
Type. Imperfect distorted fish ; oiim ltegley Collection. 
Esually smaller than the type species, with relatively deeper 
trunk and smaller spines. The three foremost dorsal fin-spines 
shorter than those following ; pelvic and anal spines shorter than 
those of the dorsal fin. 
Form, if Loc. Oligocene : Canton Glarus, Switzerland. 
!*• 3933. Type specimen of so-called Acanus arcuatus, briefly 
described by Agassiz, tom. cit. p. 127 ; Engi. > 
Enniskillen Coll. 
33966. Imperfect deepened trunk, displaying large pelvic fin-spine ; 
Engi. Presented by Hiss Elizabeth Warns, 1859. 
I*. 3935. Imperfect deepened specimen ; Engi. Enniskillen Coll. 
4950. Another deepened specimen ; Plattenberg. 
Presented by John Edward Lee, Esq., 188o. 
The following species have also been recognised, but are not 
represented in the Collection 
(?) Acanus aquispina, A. Wettstein, Fischfauna Tertiaer. 
Glarnerschief. (1886), p. 67. Acanus obloiu/us, G. vom 
Rath, Zeitschr. deutsch, geol. Ges. vol. xi. (1859), 
