clxx Journal of Comparative Neurology. 



degeneration. This nerve, like the preceding, seems to have connect- 

 ions with the cerebellum. The N. vestibularis is more highly devel- 

 oped in birds of good powers of flight than in others. 



(c). Nervus facialis. These fibres are distinguished from those 

 of the two preceeding nerves not only by their distribution, but by 

 their greater size and more intense color. They pass to their nidulus 

 after making the genu, as in all other vertebrates. A few fibres seem, 

 however, to pass directly to the raphe with those of the N. cochlearis. 



The Cerebellutn. In birds the three peduncles are not distinct 

 and by reason of the absence of the pons the fibres of the middle 

 peduncle are not represented. The details of the cerebellar connect- 

 ions were fully investigated both by the fibre-sheath stain of Weigert 

 and the experimental method of Marchi. The anterior peduncle is 

 represented by fibres which arise for the most part from the central 

 niduli, though some may come from the cerebellar cortex also. Most 

 of the numerous elements found in the posterior peduncle of mam- 

 mals are also represented there in birds. Thus we find here the lat- 

 eral cerebellar tracts, numerous fibres from the dorsal columns, many 

 from the formatio reticularis most of which probably originate on the 

 opposite side, some from the cells surrounding the formatio reticularis 

 (Bechterew's nucleus of the lateral column?), and a probable tract 

 from the olives. 



The Sense Organs of Lunibricus. 



Two new papers on this subject appear simultaneously each con- 

 firming Smirnow's discovery of free nerve termini in the skin (cf. this 

 Journal, IV, p. cxxxvi). Miss Langdon 1 describes not only such ter- 

 mini, but multicellular sense organs everywhere scattered over the 

 skin in accordance with a definate pattern. These organs each con- 

 tain 30 or more cells so closely resembling the isolated ganglion cells 

 of Lenhossek that the author is constrained to believe that they are 

 identical with them. 



Dr. Retzius 2 illustrates several varieties of such free termini as 

 Smirnow described. 



Langdon, Fanny E. The Sense Organs of Lumbricus agricola Hoffm. 

 Preliminary Notice. Anat. Anz., X, 3-4, Oct., 1894. 



2 Die Smirnow'schen freien Nervenendigungen im Epithel des Regenwurms. 

 7 figures. Anal. Anz., X, 3-4, Oct., 1894. 



