76 A. C. OUDEMANS. 
29. Barrors.—‘ Recherches sur Vembryologie des Nemertes,’ Lille, 1877. 
30. Horrmann.—“ Zur Anatomie und Ontogenie von Malacobdella,” ‘ Vers}. 
Med. Kon. Acad. Wet. Afd. Nat.,’ xi, 1877. 
31. Vow Kennet.— Beitrage zur Kenntniss der Nemertinen,” ‘ Arb. Zool. 
zoot. Inst. Wiirzburg,’ iv. 
32. Giarp.—“ Sur l’Avenardia Priei, Némertien geant de la cote occi- 
dentale de France,” ‘ Bull. Sc. Dép. Nord.,’ Ann. i, 1878. 
33. Giarp.—(Idem.) ‘ Compt. rendu,’ Ixxxvii, 1878. 
34, Grarp.—On Avenardia Priei, a Gigantic Nemertean,” ‘Ann. and 
Mag. Nat. Hist.,’ ii, 1878. 
35. Huprecut.—“The Genera of European Nemerteans Critically Revised, 
with Descriptions of Several New Species,” ‘Notes from the Leyden 
Museum,’ i, No. 44, 1879. X 
36. GULLIVER.—“‘ On a New Land Nemertine, Tetrastemma roderica- 
num, ‘ Phil. Trans.,’ el xvii, 1879. 
37. Grarr.—*Geonemertes chalicophora, eine neue Landnemertine,” 
‘Morph. Jahrg.,’ 1879, vy. 
38. DeworeTzxy.—‘ Zur Anatomie der Nemertinen,” Vorlaufige Mitthei- 
lung, i, ii, ‘ Zool. Anz.,’ iii, p. 375 u. 396, 1880. 
39. Husrecut.— Der Excretorische Apparat der Nemertinen,” ‘ Zool. Anz.,’ 
26 Januar, 1885. 
For nomenclature Nos. 18 and 35 have served me. 
EXPLANATION OF PLATES I, II, and Ts 
Illustrating Mr. A. C. Oudeman’s Memoir on “The Circulatory 
and Nephridial Apparatus of the Nemertea.” 
In Plates I and II the blood-spaces are marked red, the nephridia 
blue. The short lines accompanying the figures in Plate I show the levels 
at which the transverse sections have been obtained which are figured in Plate 
IJ. The numbers placed on these lines correspond to the numbering of the 
figures in Plate IT. 
Plate II only contains figures of transverse sections. All that is grey 
belongs to the nerve system. J. Intestine, and Ps. Proboscidian sheath. 
The figures in Plate III are all drawn by means of the camera lucida, 
Figs. 55—61 with a Zeiss, obj. 8, oc. 2, and Figs. 62—75 with a Siehert, obj. 
imm. No. 7, Periscopic ocular, 
