310 
Florence Peebles. 
It can be readily seen by comparing these two tables that Convoluta 
and MonocJioerus are very closely related, the distinction resting upon 
the Position of the opening of the chitinous mouth-piece. Further study 
of the species now included under the genus Convoluta may result in 
changing their position. 
-As our knowledge of the Acoela increases it seems probable that the 
Classification based upon the presence or absence of a bursa seminahs 
will prove more satisfactory than one based upon the number of genital 
openings. 
In conclusion, I wish to express my grateful appreciation of the, 
kindness shown me by the members of the staff at the Zoological Station 
in Naples. My thanks are especially due to Dr. Cerruti, for his untiring 
efforts to secure the material that I desired. I am glad also to have this 
oppoftunity to thank the Naples Association for again allowing me to 
use the American Woman's Table; and Prof. F. Doflein for the per- 
mission to continue my investigations in his laboratory, while spending 
the summer in Freiburg. Lastly it is fitting to mention the Boston 
Brauch of the Association of Collegiate Alumnae whose fellowship I held 
while engaged in this and other investigations. 
Bryn Mawr, Pa., Jime lOth, 1914. 
Literature. 
1895. Böhmig, L., Die Turbellaria Acoela der Plankton-Exp. in: Ergebn. Plankton- 
Exp. Bd. 2. 
1908. — Turbellaria in : Rés. Belgica z. Anvers. 
1906. Brinkmann, Aug., Studier over Danmarks Rhabdocoele og Acoete Turbellarier. 
in: Vidensk. Meddel. Nat. Foren. Kjobenhaven. 
1874. Graff, L. von, Zur Kenntnis der Turbellarien. in: Zeit. f. Wiss. Z. Bd. 24. 
1891. Die Organisation der Tubellaria Acoela. Mit einem Anhange von 
G. Haberlandt. Leipzig. 
1904. Marine Tubellarien Oratovas und der Küsten Europas. Zeit. Wiss. Z. 
78. Bd. 
1905. Turbellaria Acoela. in: Tierreich. 23. Lief. 
1905. Turbellaria. Erste Unterklasse, Acoela. in: Bronn's Klass. Ord. 4. Bd. 
1912. Acoela, Rhabdocoela und AUoeocoela des Ostens der Vereinigten 
Staaten von Nordamerika, in: Zeit. Wiss. Z. 99. Bd. 
