TYPE CRUSTACEA. 427 



V. Hensen. Studien iiber das OehOrorgan der Decapoden. Zeitschr. fur 



wissensch. Zool., xin, 1863. 

 C. Grobben. Beitrdge zur Kenntniss der mdnnlichen Geschlechtsorgane der 



Decapoden. Arbeiteu a. d. Zoolog. Inst. Wieu, i, 1878. 

 T. H. Huxley. Tlie Crayfish. London and New York, 1881. 

 W. K. Brooks. Lucifer: a Study in Morphology . Philosoph. Trans. Royal 



Soc. London, CLXXIII, 1882. 

 H. Reichenbacb.. Studien zur Entwicklungsgeschichte des Flusskrebses. Ab- 



handl. Senckenburg. Gesellsch. Frankfurt, xiv., 1886. 

 W. F. E. Weldon. Ccelom and Nephridia of Palcemon serralus. Journal 



Marine Biolog. Assoc., i, 1889. 

 G. H. Parker. The Histology and Development of the Eye in the Lobster. 



Bulletin Museum Cornp. Zoolog., xx, 1890. 

 P. Marchal. Recherches anatomiques et physiologiques sur I'appareil excreteur 



des Crustaces decapodes. Archives de Zool. exper. et gen., 2ine ser., x, 



1892. 

 W. K. Brooks and F. H. Herrick. The Embryology and Metamorphosis of the 



Macroura. Proc. U. S. National Acacl., v, 1892. 

 Z. J. Allen. Nephridia and Body-cavity of some Decapod Crustacea. Quarterly 



Jouru. Microscop. Science, xxxiv, 1893. 



ARTHKOSTRACA. 



0. Harger. Report on the Marine Isopoda of New England and Adjacent 



Waters. Report of the U. S. Commissioner of Fish and Fisheries for 



1878. 

 A. Delle Valle. Gammarini del Golfo diNapoli. Fauna und Flora des Golfes 



von Neapel. Monogr., xx, 1893. 

 P. Mayer. Caprelliden. Fauna und Flora des Golfes von Neapel. Monogr., 



vi and xvi, 1882, 1890. 

 0. Nebeski. Beilrlige zur Kenntniss der Amphipoden der Adria. Arbeiten a. 



. d. Zoolog. lust. Wien, in, 1890. 

 E. Kossmann. Studien uber Bopyriden. Zeitschr. fiir wissensch. Zoologie, 



xxxv, 1881 ; Mitth. a. d. Zoolog. Station zu Neapel, in, 1882. 

 Yves Delage. Contribution d I' etude de I'appareil circulaloire des Crustaces 



edriophthalmes marins. Archives de zool. exper. et gen., ix, 1881. 



APPENDIX TO THE TYPE CRUSTACEA. 



Order Xiphosura. 



The Xiphosura is a group which possesses many Crus- 

 tacean peculiarities, and also many foreign to that group and 

 more especially characteristic of the Arachnida ; consequently 

 it is advisable to consider it as an order by itself, intermediate 

 between the two types. 



A single genus, Limulus (Fig. 195), with few species consti- 

 tutes the order, the members of which are popularly known 



