186 
ACTING PTERYGII. 
/fil/l-fr* . ^/> ??,/>// 
of Rhynchoncodes macrocephalus , 0. G. Costa, Atti Accad. Pontan. ^ /t ’ n 
vol. yiii. (1864), p. 102, pi. is. figs. 10, 11. They have already been 
placed in this genus by P. Bassani, Denkschr. k. Akad. Miss., 
math.-naturw. Cl. vol. xlv. (1882), p. 239. 
The so-called Propterus serratus, Munster MS. (L. Agassiz, Poiss. 
Boss. vol. ii. pt. i. 1844, p. 296), from the Lithographic Stone of 
Bavaria (type in Berlin Museum), is undefined. 
Genus BJOTAGOGUSj Agassiz. 
[Poiss. Foss. vol. ii. pt. i. 1833-44, pp. 10, 293.] 
Syn. Blenniomoeus, O. G. Costa, Atti Accad. Pontan. vol. v. 1850, 
p. 319. 
Calignathus, O. G. Costa, ibid. vol. vii. 1853, p. 37. 
A genus scarcely distinguished from P'ropterus, differing only 
in the non-elongation of the anterior rays of the dorsal fin, which 
are very widely spaced, and in the less deeply forked character of 
the caudal fin. The vertebral rings also appear to be more robust 
than in Propterus. 
Notagogus pentlandi, Agassiz. 
[Plate III. figs. 7, 8.] 
1833-44. Notagogus pentlandi, L. Agassiz, Poiss. Foss. vol. ii. pt. l. 
pp. 10, 294, pi. xlix. fig. 2. 
1833-44. Notagogus latior, L. Agassiz, ibid. pp. 10, 294, pi. xlix. fig. 3. 
[Distorted fish ; Paris Museum of Natural History.] 
1850. Notagogus pentlandi , 0. G. Costa, Atti Accad. Pontan. vol. v. 
p. 312, pi. v. fig. 2, pi. vii. fig. 5. 
1850. Notagogus erythrolepis, O. G. Costa, ibid. p. 314, pi. iv. figs. 6, 7. 
1850. Notagogus minor, 0. G. Costa, ibid. p. 315, pi. v. fig. 4. 
1850. Blenniomoeus longicauda, O. G. Costa, ibid. p. 319, pi. vi. fig. 2. 
1850. Blenniomoeus brevicauda, 0. G. Costa, ibid. p. 321, pi. v. fig. 3. 
1853. Blenniomoeus major, 0. G. Costa, ibid. vol. vii. p. 34, pi. ii. 
figs. 4-6. 
1864. Notagogus pentlandi , 0. G. Costa, ibid. vol. viii. p. 72, pi. xii. 
fig. 5. 
1864. Notagogus crassicauda , 0. G. Costa, ibid. p. 74, pi. xii. figs. 6, 7. 
1864. Blenniomoeus longicauda , 0. G. Costa, ibid. p. 99. 
1864. Notagogus erythrolepis, 0. G. Costa/ ibid. p. 102, pi. xi. fig. 11. 
1864. Notagogus gracilis, O. G. Costa, ibid. p. 103, pi. xi. fig. 8. 
1882. Notagogus pentlandi , F. Bassani, Denkschr. k. Akad. Wiss., 
math.-naturw. Cl. vol. xlv. pp. 237, 239. 
Type. Nearly complete fish ; British Museum. 
A species attaining a length of about 0T5, but usually smaller. 
