460 INVBUTEBRATB MORPHOLOGY. 



C. M. Weed. A Descriptive Catalogue of the Harvest- spiders {Phalangiidm) of 

 Ohio. Proceedings United States National Museum, xyi, 1893. 



ARANB>a;. 



E. Keyserling. Die Spinnen Amerikas. Nfirnberg, 1880-91. 



G. W. and E. G. Peckhara. North American Spiders of the Family Attidoe. 



Transactions of the Wisconsin Acad. Sciences, 1888. 

 H. C. MoCook. American Spiders and tlieir Spinning Work. Philadelphia, 



1889-90. 

 J. H. Emerton. Papers in the Transactions of the Connecticut Academy, vn, 



1889, and vili, 1891. 

 G. Marx. Papers in the Proceedings of the Entomological Society of Wash- 

 ington, 1891, and in the Proceedings of the U. S. National Museum, xn, 



1890. 

 W. Schim^ewitsoh. Etude sur V anatomie de I'Epeire. Annales des Sciences 



Naturelles, 6me ser., xvn, 1884. 

 Ph. Bertkau. Ueber den Verdauungsapparat bei Spinnen. Archiv. far mi- 



kroskop. Anatomie, xxiT, 1885 

 Beitrage zv.r Kenntniss der Sinnesorgane bei Spinnen. 1. Die Augen. 



Aichiv filr mikroskop. Anatomie, xxvii, 1886. 

 E. L. Mark. Simple Eyes in Arthropods. Bulletin Museum of Comparative 



Zoology, XIII, 1887. 

 A. T. Brace. Observations on the Embryology of Insects and Arachnids. 



Baltimore, 1887. 



G. Haller. Zur Kenntniss der Tyroglyphen und Verwandten. Zeltschr. filr 



wissensch. Zoologie, xxxiv, 1880. 

 H. Henking. Beitrage zur Anatomie, Entwicklungsgeschichte und Biologie von 



Trombidium fuliginosum. Zeitschr. fur wissensch. Zoologie, xxxvn, 



1883. 

 A. D, Michael. British Oribatidm. Loudon, 1884. 

 A Nalepa. Anatomie der Phylopten. Sitzungsber. Akad. wissensch. Wien, 



xcv, 1887. 

 W. Winkler. Das Herz der Acarinen nebsi vergleichenden Bemerkungen nber 



das Herz der Phalangiden und Chernetiden. Arbeiten a. d. zool. Ins. 



Wien, vit, 1888. 

 ■ Anatomie der Oamasiden. Arbeiten a. d. zoolog. Inst. Wien, vn. 



1888. 



APPENDIX TO THE AEACHNIDA. 



There are three orders which show a certain amount of 

 affinity to the Arachnida, but which are not so closely related 

 as to warrant the actual association of them with the orders 

 which have been assigned to that type. They will be de- 



