142 NOTES ON THE ANATOMY OF DTNOPHILUS. 



specific name, whicli has already been publislied in the Proceedings 

 of the Cambridge Philosophical Society (vol. vi). According to 

 Levinsen, D. caudatus is the species which has been described by 

 other writers as D. vorticoides ; its colour is stated to be red, whilst 

 no mention is made of the existence of four-lobed ovaries or of 

 segmental ciliated rings. 



REFERENCES. 



1. VAN Beneden, p. J. — Notice sur un nouveau Nemertien de la cote d' Ostende. Bull. 



de I'Acad. Royale de Belgique, Tome xviii, Ire Partie, 1851, p. 15 {_DinopMlus 

 vorticoides^. 



2. FoETTiNaEE, A. — Secherches sur V organisation de Histriohdella homari, P. J, van 



Beneden, rapportee aux Archiannelides. Archives de Biologie, Tome v, 1884, p. 435. 



3. Feaipont, J. — Le Genre JPolygordius. Fauna und Flora des Golfes von Neapel, xiv 



Monographie, 1887. 



4. Hallez, p. — Contrihutions a VHistoire Naturelle des Turhellaries. Lille, 1879, p. 155 



\_DinopJiilus metameroides']. 



5. Hatschek, B. — Protodrilus LeucJcartii. Mine neue Oattung der Archianneliden. 



Arbeiten a. d. Zool. Inst. d. Universitat Wien, Tom. iii, 1880, p. 79. 



6. KOESCHELT, E. — Uher Ban und Entwicklung des Dinophilus apatris. Zeits. f. wiss. 



Zool., Bd. xxxvii, 1882, p. 315 (and p. 702). 



7. KOESCHELT, E. — Die Oattung Dinophilus u. der hei ihr auftretende Oeschlechtsdimor- 



phismus. [Spengel's] Zoologische Jalirbiicher, Zeits. f. Syst., Geog., u. Biol, der 

 Thiere, Bd. ii, 1887, p. 955. 



8. Lang, A. — Die Polycladen. Fauna und Flora des Golfes von Neapel, xi Monographie, 



1884, p. 678, &c. \_Dinophilus gyrociliatus'}. 



9. M'Intosh, W. C. — The Marine Invertebrates and Fishes of St. Andrew's. Edinburgh 



and London, 1875, p. 108, and pi. viii, figs. 7 — 10 \_Dinophilus vorticoides']. 



10. Mereschkowskt, C. — Ueber einige Turbellarien des Weissen Meeres. Arch. f. Naturg., 



xlv Jahrg., i Bd., 1879, p. 51 {^Dinophilus vorticoides']. 



11. Meter, Ed. — Studien ilher den Korjterhau der Anneliden. Mitt. a. d. Zool. Stat, zu 



Neapel, Bd. vii, 188R-87, p. 592 [Taf. xxvii, figs. 9, 10, Dinophilus gyrociliatus]. 



12. Repiachoff, W. — On the Anatomy and Developmental History of Dinophilus gyro- 



ciliatus, O. Schmidt. Odessa, 1886 [in Russian]. 



13. Weidon, W. F.R. — On Dinophilus gigas. Quart. Journ. Mic. Sci.,vol. xxvii, 1887, p. 109. 



DESCRIPTION OF PLATES IX and X. 



Illustrating Mr. S. F. Harmer's papei", " Notes on the Anatomy of 



Dinophilus.^' 



N.B. — All the figures refer to Dinophilus tceniatus. 



Fig. 1. — Dorsal view of a young individual; the mouth, which is ventral, is represented 

 as being visible through the semitransparent tissues of the head. 



Fig. 2. — Ventral view of an adult female, somewhat compressed. 



Fig. 3. — Longitudinal section of an adult male (combined from several sections). Most 

 of the organs are shown as they appear in a median section ; i. e. the brain, alimentary 

 canal, testis, penis, and generative pore. The eye, ventral ganglia (the distinctness of 

 which is slightly exaggerated), and vesicula semiualis, being laterally placed, would not 



