THE ENTEROPNBUSTA. 55 



List of Papers Ebfbeeed to. 



1. Agassiz, Alex.— "Hist, of Balanoglossus and Tornaria," 'Mem. Amer. 



Acad.,' vol. ix. 



2. BALrouR, F. M.—' Monograph on Elasmobranch Eishes,' 1878. 



3. Bateson. W.— "Early Stages in Dev. of Balanoglossus," 'Quart. Journ. 



Micr. Sci.,' April, 1884. (' Studies from the Morphological Labora- 

 tory,' vol. ii, part i.) 



4. Hatschek, B.— " Stud. iib. Entw. d. Amphioxus," Claus's ' Arbeiten, 



Wien, 1881. 



5. Hatschek, B.— " Mitth. iib. Amphioxus," ' Zool. Adz.,' Sept. 29th, 1884. 



6. KowALEVSKY, A. — " Anatomic des Balanoglossus," 'Mem, Acad. Imp. 



Sci.,' St. Petersburg, 1866. 



7. Lankestee, E. Eay. — " New Points in Structure of Amphioxus," 



' Quart. Journ. Micr. Sci.,' xv, p. 357. 



8. Metschnikopf, E. — "XJeb. d. Metam. einiger Seethiere," ' Z. f. W. Z.,' 



20, 1870. 



9. Metschnikofp, E. — " Ueb. d. Syst. Stell. v. Balanoglossus," ' Zool- 



Anz.,* 1881. 



10. Scott, W. B. — "Beitrage z. Entw. d. Petromyzonten," 'Morph. Jahrb.,' 



Bd. vii. 



11. Spengel, J. W. — "Bau. u. Entw. v. Balanoglossus," 'Tag. d. Naturf. 



Ver.,' Miinchen, 1877. 



12. Spengel, J. W. — "Z. Anat. d. Balanoglossus," ' Mitth. a. d. Zool. Sta. 



z. Neapel.,' Bd. v, Hft. 3 and 4. 



