VEEMES. 127 



Hirudinea.* 



IIa3mopi3, Sanguisuga, Nephelis, Clepsine, 



Annelides. 

 Oligoclifeta. 



Scoloinp. 



Lumbricus, Ohaitogaster, Nais. 

 Haliscolecina. 



Polyoplithalmus, Capitella. 



Cli^topoda. 



Vagantia. 



Siphouostoma, Ai'enicola, Glycera, Nephthys, Pbyllodocc, Alciopa, 

 Syllis, Nereis, Eunice, Amphinome, Aphrodite, Polynoe, 



Tubicolse. 



Amphitrite, Hermella, Terebella, Sabella, Serpula, Brauchiomma. 



The position of the genera Neomenia and Cliastoderma is 

 not yet settled ; but they must not be passed over, on account of the 

 great importance of many points which have been made out in their 

 organisation. Although they diifer in not unimportant points from 

 one another they are closely allied, and may be reckoned with the 

 other divisions of the Vermes. I therefore unite them into a division, 

 which I call that of the Solenogastres. It will not be possible 

 to form any safe opinion as to their position till they are known 

 more exactly; and for this knowledge, especially as regards their 

 development, we must wait. 



Bibliography. 



V. BiEH, Beitriige zui' Kenntniss der niederen Thiere. N. A. Acad. Leop. Carol. XIII. 1826.— 

 DujABDiN, Histoire nat. des Helminthea. Paris, 18-15. — Van Beneden, M(5moire sur les vers 

 intestinaux. Paris, 1861. — Leuckaht, E., Die menscliliolien Parasiten. Leipzig imd Heidel- 

 berg. I. II. 1863-76.— Clapaeede, Beobaolitungeii iiber Anatomie und Entwickelungsgeschichte 

 wirbelloser Thiere. Leipzig, 1863. 



ON THE SEPARATE CLASSES. 



Platyhelminthes : Du&es, Eeoherches sur rorganisatiou et les mcem's des Plaiiaires. Ann, sc, 

 uat. Sir. I. T. XV. ; also Isis, 1830. — Noedmann', A. v., Micrographische Beitriige zur Naturge- 

 sohichte der wirbeUosen Thiere. Brstes Heft. Berlin, 1832.— Quateefages, A. de, M(5moire 

 sur quelques Planaires marines. Aim. sc. nat. Ser. m. T. IV.— The same, Sur la famillo des 

 N^mertiues. lb. T. VI.— Schmidt, O., Die rhabdocolen Strudelwiirmer. Jena, 1818.- The 

 same, Neue Beitrage zur Naturgesehiohte der WiiiTaer. Jena, 1848. — The same, Ueber Rhab- 

 docolen. Wiener Sitzuugsbericht. Math. Naturw. Classe. Bd. IX. S. 23. — The same, 

 Ueber Dendrocolen. Zeitschr. f. w. Zoologie. X. XI. — Van Benedek, Les vers cestoides. 

 Mi^moires de I'Academie de Bruxelles. XXV. 1850. — The same, Recherches sur la faune littorals 

 de Belgique, Turbellaries. lb. XXII. 1860. — Leuckart, R., Mesostomum Ehrenbergii. Arch, 

 fiir Nat. 1852. S. 234. — Schultze, M., Beitrage zm- Naturgeschichte der Turbellarien Greifswalde. 

 1851.— The same. Ueber die Mierostomeen. Arch. f. Nat., 1819. S. 280.— Wa&enee, G., Die Bnt- 

 wiokelung der Gestoden. N. A. L. 0. T. XXIV. Suppl. 1854.— The same, Beitrage aur Ent- 

 wickelungsgeschichte der Eingeweidewiirmer. Haarlem, 1857. — Stieda, Beitr. z. Anat. v. Both- 

 ryocephalus. Arch. f. Anat. u. Phys. 1864. — Sommek and Landois, Beitrage z. Anat. d. Platt- 

 wiirmer. Zeitschr. f. -tviss. Zool. 1872.— Schiteidee, A., Ueber Platyhehninthen. Giessen, 1873 



* I would place the genus Branohiobdella, wliicli ia counted as one of the 

 Hirudinea with, the Scoleina among the Annelides. There is nothing leech-like in the 

 organisation of this worm except its sucker and jaws; and these parts are really 

 structures which are due merely to its parasitic mode of life. 



