28 THE NAUTILI'S. 



1851 — S(;lnnitlt, r«-l)er die Entwicklung vuii Cyclas culyculata. 



Miillers Arcliiv. 

 1855 — Leidip, Anatomic uiid Entwicklungsgeschichte von Cyclas. 



Miillers Arehiv. 

 1865 — Sleoanoff, Ueber die Geschlecbtorgane nnd die Entwick- 

 lung von Cvclas cornea. Arehiv fur Naturgeschichte, 31 



Jahrg., Bd! 1. 

 1885 — Ziegler, Die Entwicklung von Cyclas cornea. Zeitschrift 



fiir wLssenschaftliche Zoologie, Bd. XLI. 

 1895 — Drew, The Anatomy of 8])haerium .sulcatum. Proceed- 

 ings of Iowa Academy of Sciences. Vol. III. 

 1895 — Cook, Molluscs, Cambridge Natural History, Vol. III. 

 1898 — De Bruyne, Sur 1' intervention de la phagocytose dans le 



developpement des Invertebres — Archives de Biologic, 



P. XV. 

 1903 — Ridewood, On the Structure of the G ills of the Lamelli- 



branchia. Philosophical Transactions. Vol. CXCV, B. 

 1906 — Lankester, Treatise on Zoology, Part V. 

 1910 — Poyarkofi', Incubation des embryons et regeneration des 



Ijranchies chez les Cyclas. Archives de Zoologie Ex- 



]jerimentale, P. V. 

 1911 — Schereschewsky, Struktur und Bildung der Bruttaschen 



b.ei Cyclas cornea. Zeitschrift fur wissenschaftliche 



Zoologie, Bd. 98. 

 1913 — Isely, Experimental Study on the Growth and Migration 



of Fresh Water Mussels. Abstract in Science 1913, P. 



263. 



EXPLANATION OF PLATES IV-VI. f^[fuw p-jA'n 

 Plate IV. Figure 1. A diagrammatic dissection of Calyculina. 



