1871.] 



155 [Wilder. 



Humphrey, 72, 68; Mivart, 279, 163, in spite of the published opin- 

 ions of Foltz, 39, Wyman, 55, and the writer. They hold that the 

 relation of the membra is one of syntropy or parallelism, and that pol- 

 lex '(thumb) is the homologue of primus (great toe); we hold, on the 

 contrary, that the relation of these parts is one of analogy, and that 

 the true homologue of pollex is quintus (little toe), and that of min- 

 imus (little finger) primus, the membra being antitropically or sym- 

 metrically related. 



2. During the past year a new and vigorous ally has entered the 

 discussion. Dr. Coues' admirable papers, 70, have already been 

 briefly noticed, 1 and will be reviewed at more length hereafter. 2 I 

 now merely express my gratification and my hope that together, under 

 the guidance of our eminent teacher, Professor Wyman, we may be 

 able to show that a very small minority may yet be in the right. 



3. I have recently been led to modify my previous views respect- 

 ing the normal position of the membra in which they should be com- 

 pared together, and I am anxious to admit this change since it in- 

 volves a concession to those who hold the view of syntropy. 



Still, the present paper is intended mainly as an index of what has 

 been done, and of what remains to be done for intermembral homolo- 

 gies, and as a prodromus of the works which I hope to offer in coming 

 years. 



It will contain : — 



1. An historical sketch of the question. 



2. A revision of the nomenclature of parts. 



3. A revision of the nomenclature of ideas. 



4. Evidence as to the morphical unimportance of numerical 

 composition. 



5. Indication of general problems. 



6. Indication of special problems. 



7. Chronological list of special works upon intermembral homolo- 



gies. 



Alphabetical list of collateral works. 

 A glossary of morphological terms. 



1 American Naturalist, April, 1871. 



2 American Journal of Soiencjs, July, 1871. 



