PERCII)^. 
501 
than the others, which are nearly equal in size; pelvic and third 
anal fin-spines as long as the hindermost dorsal spine. 
Form. Sc Log. Oligocene i Canton Glams, Switzerland. 
P. 1956, P. 3934. Fragmentary fish in counterpart, displaying the 
characteristic anal fin-spines, erroneously labelled Acanus 
ohlongus by Agassiz and apparently noticed tom. cit. 
p. 126; Engi. Fgerion ERniskillen Colls. 
Acanus regleysianus (Blainville). 
1818. Zeus regleysianus^ H. D. de Blainville, Nouv. Diet. d’Hist. Nat. 
vol. xxvii. p. 316. 
1818. Zeus platessa, H. D. de Blainville, ibid. p. 317. [Imperfect fish ; 
olim Brongniart Collection.] 
1838-39. Acanus regley, L, Agassiz, Poiss. Foss. vol. iv. pp. 5, 125, 
pi. xvi. fig. 2. 
1838-39. Acanus ohlongus, L. Agassiz, ihid. pp. 5, 126, pi. xvi. fig. 3. 
[Imperfect fish ; Neuchatel Museum.] 
1838-39. Acanus arcuatus, L. Agassiz, ibid. pp. 5, 127. [Imperfect 
fish; British Museum.] 
1886. Acanus regley, A. Wettstein, Fischfauna Tertiaer. Glarner- 
schief. p. 65, pi. iii. figs. 4, 7. 
Type. Imperfect distorted fish; olim Begley Collection. 
Usually 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. 4' Log. Oligocene: Canton Glarus, Switzerland. 
P. 3933. Type specimen of so-called Acanus arcuatus, briefl}" 
described by Agassiz, tom. cit. p. 127; Engi. 
Emnislcillen Coll. 
33966. Imperfect deepened trunk, displa 3 dng large pelvic fin-spine ; 
Engi, Presented by Miss Elizabeth Warne, 1859. 
P. 3935. Imperfect deepened specimen ; Engi. EnnisTcillen Coll. 
P. 4950. Another deepened specimen ; Plattenberg. 
Presented by John Edward Lee, Esg., 1885. 
The following species have also been recognised, but are not 
represented in the Collection :— 
(?) Acanm cequispina, A. Wettstein, Fischfauna Tertiaer. 
Glarnerschief. (1886), p. 67. Acanus oblongus, G. vom 
Rath, Zeitschr. deutsch. geol. Ges. vol. xi. (1859), 
