APHREDODERIDiE. CYTTID^?. 
417 
Asineops paudradiatus, E. D. Cope, Bull. U.S. Geol. Surv. Territ. 
v ol. iii. (1877), p. 813, and op. cit. 1884, p. 87, pi. xiv. 
fig. 1. — Eocene (Green River Shales); Twin Creek, 
Wyoming. [Imperfect fish ; National Museum, Wash- 
ington.] 
Asineops sqwamifrons, E. D. Cope, Proc. Amer. Phil. Soc. 
vol. xi. (1870), p. 381, and Ann. Rep. U.S. Gool. Surv. 
Territ. 1870 (1871), p. 426, and op. cit. 1884, p. 85, 
pi. ix. fig. 5, pi. xi. Asineops viridensis, E. D. Cope, 
Ann. Rep. 1870 (1871), p. 426. — Eocene (Green River 
Shales); Green River, Wyoming. [The type species. 
Ditto.] 
Family CYTTIDiF. 
Head without superficial cavities for mucus ; premaxilloc pro- 
tractile, and dentition feeble. Branchiostegal rays / or 8 in 
number. Vertebra: about 30 in number ; the posterior abdominal 
centra with downwardly bent, transverse processes. Pelvic fins with 
°ue spine and moro than five articulated rays ; dorsal and anal fins 
extended, the former at least with anterior spines, which are not 
80 numerous as the articulated rays. Sguamation either irregulai, 
very fine, or absent, often comprising only a few scutes ; lateral line 
inconspicuous. 
There do not appear to bo any fossils in the Collection referable 
this family. 
A distorted fish, with incomplete pelvic fins, too imperfect for 
Precise determination, has been compared with the existing genus 
^ yttus and described as follows : — 
Cyttoides glaronensis, A. Wcttstein, Fischfauna Tertiaer. Glarner- 
schief. (Denkschr. schweiz. Palmont. Ges. vol. xiii. 1886), 
p. 91, pi. viii. fig. 5.— Oligocene ; Glarus. [Imperfect 
distorted fish ; Glarus Museum.] 
Extinct species of the existing genus Zeus are also imperfectly 
known as follows : — 
'Zeus benoisti, R. Lawley, Nuovi Studi Pesci, &c., Colline Toscane 
(1876), p. 65, pi. iv. fig. 5.— Lower Pliocene ; Orciano, 
Tuscany. [Dermal plate.] 
Zeus hoernesi, D. G. Kramberger, Rad Jugoslav. Akad. vol. cvi. 
(1891), p. 86, pi. i. figs. 2, 4-7, pi. vi. figs. 1, 2.— Upper 
Oligocene ; Tiiffer, Steiermark. [Fragmentary fish.] 
pari iv. 2 E 
