LATERAL MUSCLE IN TELEOSTET. 337 
ventral portion and a (ventral) mesio-ventral portion. The fibres 
of the latter, at first oblique, as they approach the middle line 
become straight, and resemble a rectus. 
5. The above divisions of the dorsal and ventral moieties 
suffice for descriptive purposes; but, pending further evidence, 
they inust be regarded as essentially empirical in nature. 
6. Small cylindrical longitudinal muscles are frequently cut off 
from the mesio-dorsal portion, along the mid-dorsal line in the 
interspaces of the dorsal fins. ‘These are the supracarinales of 
Owens 
Similar muscles are frequently cut off from the mesio-ventral 
portion along the mid-ventral line. ‘These are the infracarinales 
of Owen. 
7. A small muscle, whose fibres are usually distinguished by 
their red colour, is cut off from the latero-dorsal portion and 
occupies the slope of the furrow in which the lateral nerve is 
situated. 
A corresponding muscle is cut off from the latero-ventral 
portion immediately below the lateral line. 
LITERATURE. 
1. Curyret, R.—“ Essai sur la morphologie et la physiologie 
du muscle latéral chez les Poissons osseux.” Arch. Zool. 
Expér., Tome 52, fasc. 8, 1913, p. 478. 
2. Dinrz, P. A.—‘Over den vorm der Myotomen bij de 
Teleostei.” Tijdschr. Ned. Dierk. Vereen. ser. 2, vol. ii. 
1910, Appendix, pp. xxv—xxvil. 
3. GEGENBAUR, C.— Elements of Comparative Anatomy. 
Translated by Mr. Jeffrey Bell and revised by Sir Ray 
Lankester, 1878, p. 493. 
4. Humpury, P.—‘‘ On the Disposition of Muscles in Vertebrate 
Animals.” Journ. Anat. and Phys. vol. vi. 1871-72, 
p. 293. 
5. Knauer, K.—“ Die Bauchmuskulatur der Fische.” Arb. 
Zool. Inst. Univ. Wien, vol. xvi, No. 3, 1909-10, p. 207, 
3 plates. 
6. Maurer, F.—“Der Aufbau u. die Entwickelung der ven- 
tralen Rumpfmuskulatur bei den urodelen Amphib. 
deren Beziehung zu den gleichen Musk. der Selach. 
Teleost.” Morph. Jahrb. xvii. 1892. 
7. McMurricu, J. P.—‘* Myology of Amiurus catus.” Proc. 
Canad. Inst. vol. ii. No. 3, 1884, p. 60. 
8. OwEN, R. — Comparative Anatomy and Physiology of 
Vertebrates, vol. 1. 1886. 
9. WiEDERSHEIM, R. — Comparative Anatomy of Vertebrates. 
Adapted from the German by Prof. W. N. Parker. 3rd 
English edition, 1907. 
