MORPHOLOGY OF THE VERTfiBKATE OLFACTORY ORGAN. 311 



book of embryology, published in the course of the present 

 year, dismisses my previous account of the development of 

 the olfactory nerve as " eine Angabe, die mit der Darstellung 

 von Remak, d^pr zufolge die Lohi olfactorii des -Hiibnchens 

 am Ende des zz. Tages als kleine birnforrnige Blaschen am 

 Bodeii der Hemispharenblasen liegen, nicht zu vereineu 

 ist."^ Professor KoUiker's words show, beyond doubt, that 

 he is quoting from Remak's earlier statement ; had he been 

 acquainted with the latter part of Remak's work he would 

 have known that my observations confirmed instead of con- 

 tradicting Remak. 



Again, Foster and Balfour describe the development of 

 the olfactory nerve in the chick thus : — " At the under 

 surface of each of the vesicles of the cerebral hemispheres 

 there appears towards the end of the third day a small, some- 

 what elongated vesicle — the olfactory vesicle — which is the 

 rudiment of the olfactory nerve or bulb."^ The authors 

 make this statement on their own authority, but since the first 

 part of their description is an almost literal translation of 

 Remak's earlier account, it is, I think, a fair inference that 

 they have fallen into the same error as Professor KoUiker. 

 Remak, however, is not responsible for the statement that 

 this olfactory vesicle is " the rudiment of the olfactory nerve 

 or bulb." 



Any further discussion of the literature of this subject 

 would be unprofitable ; it is, however, only fair to add that 

 at the time of writing my previous paper I had not referred 

 to Remak's work, and was under the impression that my 

 description was completely at variance with his account ; 

 it is, therefore, a matter of great satisfaction to myself to find 

 my statements corroborated by such high authority. 



• c. hi the salmon and trout. — Though my observations on 

 Teleostean embryos are not nearly so complete as those I 

 have just recorded concerning the chick and dogfish, yet, 

 inasmuch as they have yielded definite, and in some respects 

 important and unexpected results, I have thought it well to 

 record them here. 



The ova were obtained in the early part of last year from 

 Mr. Capel, of the Foot's Cray Fishery ; for the opportunity 

 of hatching them I am indebted to Mr. F. Buckland, to 

 whom my best thanks are due for the liberal and courteous 

 manner in which he met my requests. I am also much 



^ KoUiker, ' Entwickelungsgeschiclite des Menschen uud der hoberen 

 Tbiere ;' Zweite Auflage. Zweite Hiilfte, 1879, p. 609. 

 = ' Elements of Embryology.' Part 1 , 1874, p. 117. 



