884 



PROF. G. C. BOURNE ON THE 



[Nov. 17, 



38. SiMROTH, H. — Gasti-opoda prosobranchia. Bronn'sTieiTeichs: 



Mollusca, 1896-1907. 



39. Thiele, J. — Die systematische Stelkmg der Solenogastren uiid 



die Phylogenie der Mollusken. Zeitschr. f. wiss. Zoologie, 

 Ixxii. 1902, p. 249. 



40. Tryon, G. W. — Manual of Conchology, vol. x. Philadelphia, 

 1888. 



Woodward, M. F. — The Anatomy oi Fleitrotomaria heyrichii.. 



Quart. Journ. Micr. Sci. xliv. 1901, p. 215. 

 Woodward, S. P. —A Manual of the Mollusca. London, 



1875. 



41 



42 



EXPLANATION OP THE PLATES. 



Plates XLVI.-LXVL 



Lettering in all the figures, except figs. 36-39. 



af.hr. Aflerent branchial vessel. 



An. Anus. 

 ap.de. Aperture of the ductus 

 enigmaticus. 

 ax. Axial plate of ctenidium. 

 h.gl. Basal gland of the male 



gwiital organs. 

 hp.n. Branchio-pallial nerve. 

 hr.n. Branchial nerve. 

 h.si. Blood-sinuses of kidney. 

 cap. Aperture between pericardial 



and gonadial ccelom. 

 cll.c. Ciliated cells. 

 cil.ep. Ciliated epithelium. 

 cil.p. Ciliated passage into ureter. 

 cil.tr. Ciliated tract of gill-lamellse. 

 cl.ffl. Clear gland. 

 cm.l. Left columellar muscle. 

 cm.r. Right columellar muscle. 

 Cp. Cephalic penis. 

 Cry.s. Crystal-sac. 

 Ct. Ctenidium. 

 D.en. Ductus enigmaticus. 

 E. Eye. 

 JEd. Egg-duct. 

 ef.hr. Efferent branchial vessel. 

 Epd. Epididymis. 

 fr.cil. Frontal cilia. 

 ff.co. Gonadial coelom. 

 Gd. Genital complex. 

 ffl.c. Gland-cells. 

 liy-g. Hypobranchial gland. 

 Hij.g.a. Aperture of hypobranchial 

 gland. 

 Int. Intestine. 

 int.c. Interstitial cells. 



K. Glandular portion of the 



kidney. 

 K'. Bladder or non-glandular por- 

 tion of the kidnej'. 

 X.a«. Left auricle. 



Li. Liver. 

 Li.d. Hepatic ducts. 

 l.nisc. Longitudinal muscles of gill. 

 M. Mantle. 

 M.c. Mantle-cavity. 

 M.ep. Mantle-epithelium. 



m.f Muscle-iibres. 

 m.gl. Mucous gland. 

 m.t. Middle tube of gonaduct. 

 O. Otocyst. 

 od. Oviduct. 

 od.c.f Oviduco-coelomic funnel. 

 Oe. Esophagus. 

 Oot. Oot3'pe. 

 Oot.ep. Epithelium of ootype. 

 Op. Opercular lobe. 

 Os.g. Osphradial ganglion. 

 Ov. Ovary. 

 Ov.ap. Ovipository aperture. 



P. Pedal nerve-centres. 

 pc.co. Pericardial ccelom. 

 Ph. Pharyngeal bulb. 

 prs. Prostate. 

 jB. Rectum. 

 E.ati. Right auricle. 

 R.ct. Right ctenidiuiu. 

 rc.gl. Rose-coloured gland. 



Sd. Radula. 

 R.p.c. Reno-pericardial canal. 

 B.s. Receptaculum seminis. 

 P.s.d. Duct of receptaculum seminis. 

 S.g. Salivary gland. 

 Sp. Spermatoj)hores. 

 sp.d. Sperm-duct. 

 sp.ep. Epithelium of sperm-duct. 

 lip.s. Sperm-sac. 

 Spz. Spermatozoa. 

 St. oesophageal division of stomach. 

 St'. Pyloric division of stomach. 



T. Tentacle. 

 tell. Terminal chamber. 

 th. Thalamus 

 Ts. Testis. 

 TJr. Ureter. 

 JJr.p. Uropore. 



V. Ventricle of heart. 

 Vag. Vagina. 

 Vag.ap. Vaginal aperture. 

 Vag.c. Vaginal canal. 

 vis.gn. Visceral ganglion. 

 vis.n. Visceral nerve. 

 vt.g. Vitelline gland. 



