48 



Presents. 



[Mar. 24, 



support the view that the remote ancestor of the Crustacea was a long 

 series of independent zoonites or metameres. Even if this view were 

 supported by facts, the embryology of Lucifer compels us to recognise 

 a recent and persistent bond of homology between its appendages. 



The next section is an attempt to show that, while we are unable to 

 believe that serially homologous organs, in all cases, owe their resem- 

 blance to heredity from the unspecialised organs of a remote ancestor, 

 they may still be due to heredity ; but to heredity from the same part 

 of the developing egg, rather than from a remote ancestor. 



The last section is an attempt to show that, by making a slight 

 change in Darwin's " Pangenesis Hypothesis," it can be so simplified, 

 that the germinules which it demands may be few in numbers, simple 

 in their properties, and not infinitely small. In its modified form the 

 hypothesis accounts for the phenomena of serial homology and sym- 

 metry, and it removes some of the most serious difficulties of the 

 theory of natural selection, especially by showing why variations 

 appear when they are needed. 



Presents, March 24, 1881. 



Transactions. 



Amsterdam: — K. Akademie van Wetenschappen. Verhandelingen. 

 Afd. Natuurkunde. Dl. XX. Afd. Letterkunde. Dl. XIII. 

 4to. Amsterdam 1880. Verslagen en Mededeelingen. Afd. 

 Natuurkunde. 2e Rks. Dl. XV. Afd. Letterkunde. 2e Rks. 

 Dl. IX. 8vo. Amsterdam 1880. Jaarboek 1879. Processen- 

 Verbaal 1879-80. Prijvers : Satira et Consolatio. Naam-en 

 Zaakregister op de Verslagen en Mededeelingen : Afd. Natuur- 

 kunde. Deel 1 — XVII. 8vo. Amsterdam. The Academy. 



Cincinnati : — Society of Natural History. Journal. Vol. I. No. 4. 

 Vol.11. Nos.1-4. Vol. III. Nos. 2, 3. 8vo. Cincinnati 1879-80. 



The Society. 



Danzig: — Gresellschaft Deutscher Naturforscher und Aertzte. 



Tageblatt der 53 Versammlung. 4to. Danzig. The Society. 

 Dublin: — Royal Geological Society of Ireland. Journal. N.S. 



Vol. V. Part 3. 870. Dublin 1880. The Society. 



Edinburgh: — Scottish Meteorological Society. Journal. N.S. 



Nos. 60-63. 8vo. Edinburgh 1880. The Society. 



Falmouth : — Royal Cornwall Polytechnic Society. Annual Report, 



1879. 8vo. Falmouth. The Society. 



Freiburg in Baden : — Naturforschende Gesellschaft. Berichte iiber 



die Verhandlungen. Band VII. Heft 4. 8vo. Freiburg i B. 1880. 



The Society. 



