167 



bulbOwEN^) describes as enormous. Although Ornithorhyuclius 

 has, compared with Marsupials, a small olfactory apparatus, still it 

 would be distinctly misleading to call it microsmatic. Such a use of 

 the term would be entirely opposed to Sir William Turner's idea, 

 when he introduced the term. It would introduce quite unnecessary 

 confusion to classify the Monotreme (whose smell organs are so well 

 developed as to afiord a type for the whole vertebrate series) with 

 those Primata and Cetacea whose olfactory apparatus is distinctly 

 atrophic and therefore atypical. Quite apart from such considerations, 

 the relative size and development of the olfactory bulb gives the 

 Prototheria a claim to the term "macrosmatic", equal to that of the 

 Kangaroo or Dog. 



A study of the relations of the part of the olfactory bulb asso- 

 ciated with Jacobson's organ with the methods of Golgi and Weigert 

 does not reveal any arrangement different from the rest of the bulb. 

 Thus from the mitral cells associated by glomeruli with Jacobson's 

 olfactory nerves, axis cylinder processes arise which can be readily 

 traced to the external olfactory radiation to terminate in the pyriform 

 lobe. Although, from the peculiar conformation of the "cup", fibres 

 could not be traced to the internal radiation, appearances seem to 

 point to the fact that the region is also connected with the hippo- 

 campus. It would appear therefore that in all its connections with 

 the brain the organ of Jacobson exactly resembles the olfactory appa- 

 ratus proper and like the latter has its centres in the pyriform lobe 

 and probably also in the hippocampus. 



Sydney, New South Wales, June 26, 1895. 



Nachdruck verboten. 



TJeJber die Muskelschichten im Drüsenmagen der Vögel. 



Von Dr. Albert Oppel, a. o. Professor an der Universität Freibarg i. B. 



Im Drüsen magen der Vögel waren es stets in erster Linie die 

 Drüsen, welche das Interesse der zahlreichen Forscher fesselten, die 

 sich mit diesem Organ befaßten. So mag es verständlich sein, daß 

 der Punkt, welchen ich hier zur Sprache bringen möchte, bisher un- 

 beachtet blieb. In der gesamten älteren Litteratur findet man die 

 Angabe, daß sich im Oesophagus und Drüsenmagen der Vögel zwei 



1) Comparative Anatomy. 



