252 INVERTEBRATE MORPHOLOGY. 



2. Order Rhynchobdellidm.—^ ithovA teeth and with protrusible 

 pharynx. Clepsine, Pontohdella, Piscicola, BranchelUon. 



III. Class Gephyrea. — Metamerism indistinct ; without parapodia. 



1. Order Eehiurea. — With setae. Eehiurus, Thalassema, Bo- 



nellia. 



2. Order Sipimculaeew. — Without setae. Sipunculus, Priapit- 



lus, Phascolosoma, Phascolion. 



IV. Class MYZOSTOMB.S). — Parasitic on Crinoids ; approximating a radial 



symmetry. Myzostoma. 



APPENDIX. 



Class PHORONiDiE. — Without metamerism ; tubicolous ; with lophopnore. 

 Phoronis. 



LITERATURE. 



CH^TOPODA. 



A. de Qnatrefages. Eistoire naturelle des Anneles mmrins et Weau douce. 



Paris, 1865. 

 E. Ehlers. Die, Borstenieurmer. Leipzig, 1864-68. 

 E. Meyer. Studien ilber den Korperbau der Anneliden. Mitth. a. d. zoolog. 



Station zu Neapel, vii, 1887 ; vill, 1888. 

 H. Eisig. Die Capitelliden des Oolfes von Neapel. Fauna und Flora des Golfes 



von Neapel. Monogr., xvi, 1887. 

 J. Eraipont. Le genre Polygordius. Fauna und Flora des Golfes von Neapel. 



Monogr., xvi, 1887. 



E. Claparede. Recherchea anatomiques sur Us Oligoehkeg. Geneve, 1863. 



F. Vejdovsky. Monogra/pMe der Enchytrcdden. Prag, 1879. 



■ System und Morphologie der Oligochceten. Prag, 1884. 



Numerous papers on Oligochaeta by G. E. Beddard and W. B. Benham in 

 Quarterly Journ. Microscop. Science. 



HIKUDINBA. 



A. Moqnin-Tandon. Monographie de lafamille de SirudinSes. Paris, 1846. 

 C. 0. Whitman. The Leeches of Japan. Quarterly Journ. of Microscop. Science, 



XXVI. 1886. 



The Metamerism of Clepsine. Festschr. zum siebenzigsten Geburtstage 



Rudolf Leuckarts. Leipzig, 1893. 

 A. G. Bourne. Contributions to the Anatomy of the Etrudinea. Quarterly 



Journ. of Microscop. Science, xxiv, 1884. 



GEPHYRBA. 



E. Greef. Die EcMuren (Oephyrea armata). Nova Acta Leopol. Carol. Aiad 

 XLi, 1879. ' ' ■' 



E. Selenka. Die SipuneuUden. Wiesbaden. 1883. 



E. A. Andrews. Notes on the Anatomy of Sipunculus Oouldii, Pourtales 

 Studies from the Biolog. Labor. Johns Hopkins Univ., iv, 1890. 



