374 EDWIN S. GOODRICH. 



29. PcNNETT, R. C. — "Oil the Formation of the Pelvic Plexus, etc., in 



Mustelus," 'Phil. Trans. Roy. Soc. London,' vol. B cxcii, 1900. 



30. PuNNETT, R. C— '-On the Composition and Variations of the Pelvic 



Plexus in Acanthias vulgaris," ' Proc. Rov. Soc. London,' 

 vol. Ixi.x, 190L 

 3L Rabl, C— "Theorie d. Mesoderms," 'Morph. Jahib.,' Bd. xix, 1S92. 



32. RuGE, E. — " Die Eiitwickl. Skeletes der vorderen Extremitatem von 



Spinax niger," 'Morph. Jahrb.,' Bd. xxx, 1902. 



33. Semon, R. — "Die Entwickl, d, Paarigen Elossen des Ceratodus 



forsteri, 'Zool. Eorsch. and Jen. Denkschr.,' BJ. iv, 1S98. 



34. Sherrington, C. S. — " Notes on tlie Arrangement of some Motor 



Fibres iu the Lumbo-sacral Plexus," ' Journ. of Phys.,' vol. xiii, 

 1892. 



35. TiuciiER, J. K.— "Median and Paired Fins," 'Trans. Connecti. Acad.,' 



vol. ill, 1877. 



36. WiEDERSiiElM, R. — 'Das Gliedmassenskelet der "Wirbellhierr,' Jena, 



1892. 



37. Woodward, A. S. -" The Evolution of Fins," 'Natural Science,' 1892. 



EXPLANATION OF THE PLATES. 



Illiistrating Mr. E. S. Goodiicli's paper, "Notes on the Deve- 

 lopment, Structure, and Origin of tlie Median and Paired 

 Fins of Fish." 



Lettering of the Figures. 



a. f. Anal fin. a. I. c. Anterior longitudinal colled or nerve. a>i. Con- 

 necting strand of tissue, bp. Basipterygium. br. ar. Branchial arch. ca. 

 Nerve canal, c. r. Cartilaginous radial, c. t. Connective tissue, d. J. 

 Dorsal fin. d. r. Dorsal root. g. Ganglion. //. vi. Hypoglossal muscula- 

 ture. /. s. c. Longitudinal sensory collector nerve, m. Myotome, m. b. 

 Muscle-bud. m. f. Motor fibres, n. Nerve. 7i. a. Neural arch. «. cd. 

 Nerve-cord. p. g. Pelvic girdle. /;. /. c. Posterior collector nerve, p. r. 

 Procartilaginous radial, pt- f- Pectoral fin. pv. f. Pelvic fin. r. Radial or 

 somactid. i\m. Radial muscle, r.pt. Ramus ptcrygialis. s. First indica- 

 tion of the skeleton, s. f. Sensory fibres, v. Vagus, v. r. Ventral root. 

 X. is placed in front of a number wliich could not be accurately determined. 



