RELATIONS OF KIDNEYS IN HALIOTIS TllBEROULATA. 05 



13. Arnold Lang. — ' Lelnbucli, etc.,' ' Mollusca.' Jena, 1900. 



14. Mautin F. Woodward. — "The Anatomy of PleurotomariH r>cy- 



richii," 'Quart. Jourii. Micr. Sci.,' vol. xliv, 1901. 



EXPLANATION OF PLATE 6, 



Illit.strating H. J. Fleure's paper " Notes on the l^elations of 

 the Kidneys in Haliotis tnberculataj etc." 



Explanation of Reference Letters, etc., in Diagrams. 



1. External aperture of left kidney of Diotocards and of kidney of Monoto- 

 cards. 2. External aperture of right kidney of Diotocards and of genital 

 system of JMonotocards. 3. Anus. 4. Left reno-pericardial opening. 5. Right 

 reno-pericardial opening. G L. Left gonad. G R. Right gonad. 7 L. Left 

 kidney. 7 R. Right kidney. 7. Monotocard kidney. 7 N. Renal gland. 

 7 T. Tnhules of renal gland. 8. Pericardium, a. l. Anterior lobe of right 

 kidney. B. P. Brood pouch of Tanganyikia rufofilosa. r. Penis. 

 Gr. Groove connecting genital aperture with brood ])ouch (somclinies vestige 

 only), s. D. Spermatic duct on fl )or of mantle cavity, probably formed by 

 covering in of groove, u. Ureter of Paludina. s. r. l. Subrectal lobe of 

 riffht kidney of Patella. R. c. Renal cavity (Pig. 9, b). g. Rectum. 

 LV. Tissue of pericardial gland, in which renal gland is embedded, ct,. Cteni- 

 diuni. ct'. Cteuidium of right side in Haliotis (Fig. 11). 



Diotocards. 



Fig. 1.— Excretory and genital organs of Cemoria noacliina (after 

 Ilaller). Contradicted and disproved by Pelseneer. 



Pig. 2.— Excretory and genital organs of Pleurotomaria Beyrichii 

 (after Woodward). 



Fig. 3. — The right kidney of Patella vulgata (after Lankestcr). 



Fig. i; a. — Kidneys, gonad, etc., of Haliotis tuberculata. 



Fig. 4-, 0. — Ova of Haliotis, much magnified. 



MONOTOCARDS. 



Fig. 5, ff. — Excretory and genital organs of the female of Tangany ik ia 

 rufofilosa (after Mooie). 



