ZOOLOGY AND BOTANY, MICROSCOPY, ETC. 341 



primary follicles) and germinative centres (secondary follicles). In 

 many cases the spongy substance of the ganglion is clearly peripheral, 

 the compact lymphoid substance is aggregated towards the axis, and 

 there is a central lymph sinus. This disposition is simpler than that in 

 the corresponding ganglia in Mammals. 



Functional Changes in Bird's Proventriculus.* — J. Michalovsky 

 has studied the glandular cells in the proventriculus of various birds, 

 and compares their appearance, especially as regards the secretory 

 globules, at various times after feeding. 



Minute Structure of Japanese Giant Salamander.! — Gakutaro 

 Osawa gives a detailed account, with beautiful figures, of the minute 

 structure of the alimentary, respiratory, and urogenital systems of 

 C 'njpto branchus japonicus. 



Blood of Fishes.J — Anna Drzewina points out that, although 

 eosinophilous leucocytes are not always absent from the blood of 

 Teleosteans, as has been maintained by several investigators, they are 

 often absent. Only eight species out of forty showed them, viz., 

 Atherina presbyter, Pagellvs cmtrodontus, Bel one acus, Trachinvs viper a, 

 Crenilabrus melops, C. massa, Labrus bergylta, and L. mixtus. 



Poison-glands of Fishes. § — E. Pawlowsky describes compact multi- 

 cellular glands in Sebastes and Pelor, of the same plan as those in 

 Scorpsena and Trachinus. He found none in Acanthurus triostegus, 

 Blepsias cirrhosus, or Mursena helena. 



Efferent Ducts of Testis in Chima3ra.|| — W. N. Parker and T. H. 

 Burlend find that the efferent ducts, which are doubtless, as in 

 Plagiostomes, derivatives of certain of the embryonic mesonephric 

 tubules, have become completely emancipated from the main body of 

 the mesonephros, and that probably one of them only, serving as a 

 collector, remains in connexion with the spermiduct. From the 

 embryological point of view there is, therefore, a representative of a 

 " Geschlechtsniere," but the actual mesonephros of the adult does not 

 include a sexual portion (" cranial zone "), as is usually the case in adult 

 Plagiostomes. The term epididymis should be dropped, for it is 

 necessary to distinguish clearly between the coiled anterior end of the 

 spermiduct ( = vas deferens, Wolffian duct, mesonephric duct), and the 

 so-called sexual portion (anterior portion or " cranial zone ") of the 

 mesonephros of Plagiostomes. 



c. General. 



Tuberculum olfactorium.f — G. Elliot Smith has studied in various 

 Mammals (Monotremes, Marsupials, Edentates, etc.) the rounded cap of 

 irregular grey matter which lies midway between the cerebral attach- 



* Anat. Anzeig., xxxiv. (1909) pp. 257-75 (8 figs.). 

 t MT. Med.-Fakultat Univ. Tokyo, viii. (1908) pp. 19-93 (15 pis.). 

 % C.B. Soc. Biol. Paris, lxvi. (1909) pp. 514-16. 

 § Anat. Anzeig., xxxiv. (1909) pp. 314-30 (6 figs.). 

 Tom cit., pp. 331-6 (4 figs.). ' f Tom. cit., pp. 200-6 (2 figs.). 



