618 DR. R. V. ERLANGER. 
It is my pleasant duty to thank the Office of Public In- 
struction of Baden for the table which it generously placed 
at my disposal, hereby enabling me to make further researches 
on the comparative anatomy and embryology of molluscs. 
The excellent organisation which the Zoological Station of 
Naples owes to its director, Professor A. Dohrn, always kept 
me supplied with an abundance of material. I must specially 
thank Sr. Lo Bianco for the trouble he took in procuring for 
me the numerous specimens which I required for my researches. 
I am further indebted to Professors Hisig and P. Mayer for 
valuable technical hints, andto my friend Mr. MacBride, who 
kindly undertook to read the manuscript of the first paper 
which I have published in the English language. 
Naples Zoological Station ; 
April 9th. 
List or WoRrKS CITED. 
1. Bernarp, F.—‘ Recherches sur les organes palléaux des Gastéropodes 
Prosobranches,” ‘Annales des sciences nat., Zoologie,’ Paris, 1890, 
7éme sér., t. viii, pp. 89—404, tab. vi—xv. 
2. Bouran, L.—‘‘ Recherches sur l’Anatomie et le Développement de la 
Fissurelle,” ‘ Archives de Zoologie expérimentale,’ 1885, 2éme série, 
t. iii bis, pp. 1—173, pls. xxxi—xliv. 
8. Bouvier, E. L.—‘ Systéme nerveux, morphologie, et classification des 
Gastéropodes Prosobranches,” ‘Annales des sc. nat., Zool.,’ 1887, 
7eme série, t. iii, pp. 1—510, tab. i—xix. 
4, Bouvier.—* Etude sur Vorganisation des Ampullaires,” ‘Memoires 
publiés par la Soc. Philom. a l’occasion du centenaire de sa fondation,’ 
1888, pp. 64—85, tab. ix. 
5. Bivscut1, O.—‘* Bemerkungen iiber die wahrscheinliche Herleitung der 
Asymmetrie der Gastropoden, speziell der Asymmetrie im Nerven- 
system der Prosobranchiaten,” ‘ Morphologisches Jahrbuch,’ xii, 1886, 
Taf. xit Xii. 
6. Cunnineuam, J. T.—*The Renal Organs (Nephridia) of Patella,” 
‘Quart. Journ. Micr. Sci.’ (2), xxiii, 1883, pp. 369—375. 
7. Dart, W. H.— Recent Advances in our Knowledge of the Limpets 
(Patella),” ‘Bull. Phil. Soc.,’ Washington, vol. vii, p. 4. 
