460 INVERTEBRATE MORPHOLOGY. 



C. M. Weed. A Descriptive Catalogue of the Harvest -spiders ( Phalangiida) of 

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



ARANE^E. 



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



G. W. aiid E. G. Peckham. North American Spiders of the Family Attidce. 



Transactions of the Wisconsin Acad. Sciences, 1888. 

 H. C. McCook. American Spiders and their Spinning Work. Philadelphia, 



1889-90. 

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



1889, aud vui, 1891. 

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



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



1890. 

 W. Schimkewitsch. Etude sur Vanatomie de L'Epeire. Auuales des Sciences 



Naturelles, 6me ser., xvii, 1884. 

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



kroskop. Anatomie, xxiv, 1885 



- Beitrage znr Kenntniss der Sinnesorgane bei Spinnen. 1. Die Augen. 

 Archiv fiir mikroskop. Anatomie, xxvn, 1886. 



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



Zoology, xm, 1887. 

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



Baltimore, 1887. 



ACARINA. 



G. Haller. Zar Kenntniss der Tyroglyphen und Verwandten. Zeitschr. fiir 



wissensch. Zoologie, xxxiv, ]880. 

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



Trombidium fuligiuosum. Zeitschr. fiir wissensch. Zoologie, xxxvn, 



1882. 



A. D. Michael. British Oribatidce. London, 1884. 

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



xcv, 1887. 

 W. Winkler. Das Herz der Acarinen nebst vergleichenden Bemerkungen iiber 



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



Wien, vii, 1888. 



- Anatomie der Gamasiden. Arbeiten a. d. zoolog. Inst. Wien, vn, 

 1888. 



APPENDIX TO THE ARACHNIDA. 



There are three orders which show a certain amount of 

 affinity to the Arachuida, 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- 



