NOTES ON COMMON SPECIES OF TROCHUS. 471 



3. Fleure, II. J. — "Zur Aiiatomie uud Phylogeuie von Haliotis," 'Jenaische 



Zeitschrift,' Bd. 39, 1904. 



4. Hallek, B. — 'Studien liber docoglosse uud rhipidoglosse Prosobranchier,' 



Leipzig, 1894. 



5. Lankestek, E. Bay. — " On tlie Originally Bilateral Character of the 



Renal Organs of Prosobranchia," 'Ann. Mag. Nat. Hist.,' ser. 5, vol. 

 vii, 1881. 



6. Pelseneer, p. — "Prosobranches aeriens et Puimones branchiferes, 



'Arch. Biol.,' xiv, 1895. 



7. Pelseneer, p. — "Les Mollusques archaiques," 'Mem. cour. de I'Acad. 



Belg.,' t. Ivii, 1899. 



8. Perrier, R. — "Le Rein des Gasteropodes Prosobranches," 'Ann. Sci. 



Nat. Zool.,' ser. 7, t. viii, 1899. 



9. Pilsbry-Tryon. — 'Manual of Conchology,' New Jersey, U.S.A. In 



progress. 



10. Randles, W. B. — "Anatomy and Affinities of the Trocbidse," 'Quart. 



Journ. Micr. Sci.,' vol. xlviii, 1904-5. 



11. Spillman, J. — "Herz u. s. w. der Diotocardier," 'Jenaische Zeitschrift,' 



Bd. 40, 1905. 



12. Thiele, J. — " Die systematische Stellung der Solenogastren und die 



Phylogenie der Mollusken," ' Zeitschrift f. wiss. Zool.,' Bd. Ixxii, 

 1902. 



13. Woodward, M. F. — "The Anatomy of Pieurotomaria," "Quart. Journ. 



Micr. Sci.,' vol. xliv, 1901. 



EXPLANATION OF PLATE 28, 



Illustrating the papei* by Dr. H. J. Fleure and Miss Muriel M. 

 Gettings on " Notes on Common Species of Troclius." 



Reference Letters. 



JJ^. Afferent side or axis of the cteuidium. Ck. Chitinous plate. CL 

 Cteuidium. Ct.Aj^. Afferent blood channel of the cteuidium. CLEff. Effe- 

 rent blood channel of the cteuidium. Eff. Efferent side or axis of the cteni- 

 dium. L.Au. Left auricle. L.K.Eff. Efferent channel from the left kidney. 

 L.K. Left kidney. Muc.gl. Mucus gland. N.G. Nepliridial gland. Osph. 

 Osphradium. R. Rectum. R.K. Excretory channel of the right kidney. 

 B.Au. Right auricle. S.B.S. Subrectal sinus. Si. Strengthening tissue 

 beneath the jaw-plates. 



