THE ANATOMY OF SCALIBREGMA INFLATCM. 305 



1892. Makenzellek, E. von.— "Polycliiiten von Ostspitzbergeii," ' Zoolo- 



gisch. Jalirb./ Band xvi, p. 397. Jena, 1892. 

 1894. Saint-Joseph, de.— "Les Annelides Polyclietes des Cotes do Dinard," 



'Annales des Sciences Naf.urelles: Zoologie,' Series vii, tome 17, 



p. 103. Paris, 189i. 



1898. Saint-Joseph, de. — "Les Annelides Polyclietes desC6t.es de France," 

 'Annales des Sciences Naturelles : Zoologie,' Series viii, tome 5, 

 p. 209. Paris, 1898. 



1898. Gamble, F. W., and Ashworth, J. H.— " Tlie Habits and Structure 

 of Arenicola marina," 'Quarterly Journal of Microsco|)ical Sci- 

 ence,' vol. xli, part 1, p. 1. London, 1898. 



1900. Gamble, F. W., and Ashwobth, J. H.— "The Anatomy and Classifi- 

 cation of the Arenicolida>," ' Quarterly Journal of Microscopical 

 Science,' vol. xliii, part 3, p. il9. London, 1900. 



EXPLANATION OF PLATES 13—15, 



Illustrating Dr. J. H. Aslnvortli's memoir on "The Ana- 

 tomy of Seal i bregma iuflatum, Rathke. 



Lisl of Reference Lellers. 



An. Anus. Anl. Cr. Anterior cornu of brain. Bl. R. Blood reservoir. 

 Br. Gill. Br. Aff. Branchial aiferent vessel. Br. Eff. Branchial efferent 

 vessel. Cirr. An. Anal cirii. Cirr. D. Dorsal cirrus of parapodium. Cirr. 

 Gl. Gland situated in the cirrus. Cirr. V. Ventral cirrus of parapodium. 

 Ccel. Coelom. Cor.l. Eidth. Cocloniic epithelium. Cat. Cuticle. Bphm}-^. 

 Diaphragms. Z>. V. Dorsal blood-vessel. Ep. Epidermis. Ep. Gl. Gland- 

 cells of epidermis. Ep. Rap. Epidermal papillae. F. Fibrous part of nerve- 

 cord. Gang. C. Ganglion ceils. Gen. C. Genital cells. Gr. V. Ventral 

 groove of intestine. NL Heart. InL Intestine. I/il. N. Nerves (? see 

 p. 2G8) of intestine. /ni. S. Intestinal sinus. Mo. Mouth. 31. Long. 

 Longitudinal muscles of body-wall. M. Obi. Oblique muscles. M. Ph. 

 Retractor muscles of pharynx. J/. Rrolr. Protractor muscles of the setal 

 sacs. N. Nucleus. N. Annul. Annulir nerve situated in the interannular 

 groove. N.C. Nerve-cord. N. Chat. Annul. Annular nerve of chaetigerous 

 annulus. Neur. S. Neuropodial seta. A'gl. Neuroglia. A^ffl. Sh. Neuro- 

 glial sheath. Nllm. Neurilemma. Nm. Neuropodium. N.M.C. Nucleus 

 of multipolar ganglion cell. N. Nuc. Nerve to nuchal organ. N. 0. Ex- 



