364 E. W. MAOBRIDE. 



results of Willey (8), obtained six years before by an exami- 

 nation of abundant living material, would be questioned on 

 the grounds of examination of imperfectly preserved and 

 scanty material : had sucli a contingency occurred to me I 

 could have given figures of every stage in the development 

 of the club-shaped gland. 



MONIREAL ; 



December 3rd, 1899. 



List of Works referred to in this Paper. 



1. Klaatsch, H. — Referat iiber "The Early Development of Amphioxus," 



' Zoologisches Centralblatt,' Jahrcf. vi, No. 4/5, 1899. 



2. KoWALEVSKY, A. — " Weiterc Studien iiber die Entwickelungsgeschicbte 



des Amphioxus lauceol atus," 'Arch. f. mikr. Anat.,' Bd. xiii, 

 1877. 



3. Lankester, E., and Willey, A. — "The Development of the Atrial 



Cliamber of Amphioxus," ' Quart. Journ. Micr. Sci.,' vol. xxxi, 1890. 



4. Lankester, E. — " Note on the Development of the Atrial Chamber of 



Amphioxus," ibid., vol. xl, 1898. 



5. Legbos. — " Developpement de la cavite buccale de I'Amphioxus 



lanceolatus," etc., quoted by Klaatsch in 'Zoologisches Central- 

 blatt,' Jahrg. vi. No. 4/5, 1899. 



6. MacBkide, E. W. — "The Early Development of Amphioxus," 'Quart. 



Journ. Micr. Sci.,' vol. xl, 1898. 



7. Samass.4. — "Studien iiber den Einfluss des Dotters auf die Gastrulation 



und die Bildung der prinuiren Kleinblalter der Wirbelthiere N. Am- 

 phioxus," 'Arch. f. Entw. Mech.,' Bd. vii. Heft 1, 1898. 



8. Willey, A. — "The Later Larval Development of Amphioxus," 'Quart. 



Journ. Micr. Sci.,' vol. xxxii, 1891. 



