151 
References descriptive of the Figures of the Muscles. 
I, first segment of the ventral sub-branchial myotome musculature. JJ, 
eighteenth segment of the sub-branchial myotome musculature. III, first segment 
of the dorsal (supra-branchial) series of myotomes in the head region. JV, second 
segment of the dorsal (supra-branchial) series of myotomes in the head region. 
V, seventeenth segment of the dorsal (supra-branchial) series of myotomes in the 
head region. VI, anularis. VII, basilaris. VIII, spinoso-semianularis anterior. 
IX, spinoso-semianularis posterior. X, “ latero-semianularis ”. XI, copulo- 
glossus rectus. XII, hyoglossus. XIII, hyo-hyoideus posterior. X7V, hyo-hyoideus 
anterior. XV, hyobranchialis. XVI, anulo-glossus. XVII, spinoso-copularis, 
XVIII, copulo-glossus obliquus. XIX, “ rhombo-semianularis”. XX, pharyngeus. 
XXT, inner ventral band of basilaris muscle. XXII, hyomandibulari-glossus. 
XXIII, longitudinalis linguae. XXIV, semianularis. XXYV, tendino-glossus. 
X VI, hyomandibulari-semianularis. 
Literature referred to in Part I. 
1. Auen, B. M. Anatomischer Anzeiger, Bd. XXVI, p. 208. 
2. Autis, E. P. “On certain Features of the Cranial Anatomy of Bdello- 
stoma dombeyi.” Anat. Anzeiger, Bd. XXIII, 1903. 
3. Ayers, H. and Jackson, C. M. “Morphology of the Myxinoidei. I. Skele- 
ton and Musculature.” Journ. Morph., Vol. XVII, 1901 and Bull. 
Cineinnati University, Ser. 2, Vol. I. (Bull 2), 1900. 
Baurour, F. M. “Comparative Embryology.” Vol. II, 1881. 
5. Busor, P. “Note préliminaire sur la métamorphose de l’Ammocoetes 
branchialis en Petromyzon planeri.” Revue Biol. Nord France, Tome III, 
1891, p. 201. 
6. Coxe, F. J. “A Monograph of the Genera! Morphology of the Myxinoid 
Fishes, based on a Study of Myxine”. Parts 1, 2, 3. Trans. Royal 
Soc. Edinburgh, Vols. XLV, and XLVI, 1905—1909. 
7. Dean, Basororp. “On the Embryology of Bdellostoma stouti. A general 
Account of Myxinoid Development” &c. Festschr. zum 70, Geburtstag 
von C. v. Kuprrrr, 1899. 
8. Doury, A. “Die Entstehung der Hypophysis bei Petromyzon planeri.” Mit- 
theil. Zool. Stat. Neapel, Bd. IV, 1883. 
9. — „Studien zur Urgesch. des Wirbeltierk.“ Mittheil. Zool. Stat. Neapel, 
Bd. V and VI, 1884, 1885. 
9a.Footr, E. Anat. Anz, Bd. XIII, 1897. 
10. FürBRINGER, Max. “Über die Spino-occipitalen Nerven” &c. Festschr. 
von ©. GEGENBAUR, Bd. III, Leipzig, 1897. 
11. — Morph. Jahrb., Bd. XXVIII, 1900, p. 478. 
12. FÜRBRINGER, P. “Untersuchungen zur vergleichenden Anatomie der Cyclo- 
stomen.” Jena Zeitschr., Bd. IX, 1875. 
13. GEGENBAUR, C. “Zur Phylogenese der Zunge.” Morph. Jahrb., Bd. XXI, 
1894. 
14. GoLoscamior, R. “Amphioxides”. Wiss. Ergebn. der Deutschen Tiefsee- 
Expedition, Bd. XII, Jena, 1905. 
15. GooprıcH, E. S. Fascicle on Cyclostomata and Fishes in LAaNnkEsTEr’s 
“A Treatise on Zoology,” London, 1909. 
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