370 INVEETEBEATA chap. 



If, and when, the development of Nautilus is worked out, we 

 shall probably gain points for comparison of the development of 

 Cephalopoda with that of other Mollusca ; in the meantime we can 

 only conclude that the accession of large stores of nourishment has 

 almost obliterated the traces of ancestral history in their development, 

 leaving only the most general resemblance in the formation of the 

 layers and the development of the sense-organs, as links between 

 them and other Mollusca. In fact, the reflection of the development 

 of organs which become important in adult life, into successively 

 earlier periods of development, termed by Lankester heterochrony, 

 has, in Cephalopoda, reached its maximum. 



LITERATURE CONSULTED 



Boutan. La Cause prinoipalo de I'Asiymetrie des Mollusques Gast&opoiles. 

 Arch. Zool. Exp., 3rd series, vol. 7, 1899. 



Casteel. The Cell-lineage and Early Larval Development of Fiona marina, a 

 Nudibranohiate Mollusc. Proc. Acad. Nat. Sci., Philadelphia, 1904. 



Conklin. The Embryology of Cre^iyato. Jonrn. Morph., vol., 13, 1897. 



Crampton, H. E. Experimental Studies on Gasteropod Development. Arch. Ent. 

 Mech., vol. 3, 1896. 



Drew. Yoldia limatula. Mem. Biol. Lab., Johns Hopkins Univ., vol. 4, 1899. 



Drew. The Life-History of Nucida delphinodonta. Quart. Journ. Micr. Sc, 

 vol. 44, 1901. 



Drew. The Habits, Anatomy, and Embryology of the Giant Scallop Peden tenui- 

 costatus. Univ. Maine Studies, Nov. 1906. 



Drummond. Notes on the Development of Pahulina vivipara, with special refer- 

 ence to the urino-genital organs and theories of Gasteropod Torsion. Quart. Journ. 

 Micr. Sc, vol. 46, 1902. 



Erlanger. Zur Entwicklung von Paludina vivipara. Morph. Jahrb. , vol. 17, 

 1891-92. 



Erlanger. Zur Bildung des Mesoderms bei der Paludina vivipara. Jbid. vol. 22, 

 1894. , 



Erlanger. Etudes sur le developpement des Gasteropodes piilmonds. (1) Etude sur 

 le rein larvaire des Basommatophores. Arch. Biol., vol. 4, 1895. 



Faussek, v. Untersuchungen iiber die Entwicklung der Cephalopoden. Mitt. Zool. 

 Stat. Neapel, voL 14, 1900. 



Harms. Postembryonale Entwicklungsgeschichte der Unionidae. Zool. Jalirb., 

 (Abt. fur Ont.), yoL 28, 1909. 



Hatschek. Uber die Entwicklungsgeschichte von Teredo. Arb. Zool. Inst. "VVien, 

 vol. 6, 1885. 



Heath. The Development of Ischnochiton. Zool. Jahrb. (Abt. fiir Ont.), \ol. 12, 

 1899. 



Herbst. tjber das Ausoinandergehen von Furchung und Gewebeszellen in kalk- 

 freien Medium. Arch. Ent. Mech., vol. 9, 1900. 



Heymons, E. Zur Entwicklungsgeschichte von Umbrella mediterranea. Zeit. f. wiss. 

 Zool., vol. 66, 1893. 



Horst. De Ontwikkeling.sgeschiedenes van de Oester. Tijdschr. Ned. Dierk. , Dec. 1, 

 1882. 



Holmes. The Early Development of Pfajiortis. Journ. Morph., vol. 16,1900. 



Koeppern. Notes on Prof. E. A. Minchin's preparations of the early stages in the 

 development o{ Sepia. Proc. Roy. Soo. Edin., vol. 18, 1909. 



Korschelt. Beitrage zur Entwickhingsgeschichte der Cephalopoden. Festsch. zurn 

 70ten Geburtstag von Leuekart, 1892. 



Kowalevsky. Embryogenie du Chiton polii, avec quelques remarques sur le 

 developpement des autres Chitons. Ann. Miis. Nat. Hist. Marseilles, vol. 1, 1883. 



Lankester. Observations on the Development of Cephalopoda. Journ. Micr. 

 Sci., vol. 15, 1875. 



Lankester. Zoological Articles, Mollusca (rept. from Encyclop. Brit. 1890). 



