L24 



XATL HALIST [Vol. XLIII 



the conclusion that Xectosaurus is nut a young form of Thalat- 

 tosaurus as the author suspected when he wrote his memoir on 

 the Thalattosauria. 



Callibrachion. — F. von Huene has restudied 1 the original speci- 

 men of Callibradiion gaudvyi Boule and Glan. from the figure 

 published in Mem, Soc. d'Hist. Nat. d'Antun, 1893, Taf. 3, and 

 has republished this figure as a page plate. He was led to this 

 study by the fact that the three incongruous characters of 

 coronoid process of the mandible, opisthocoelous cervicals and 

 the presence of only about 20 presacral vertebra' being assigned 

 to the form and on these characters it had been assigned to the 

 Protorosauria by earlier authors and later to the Pelycosauria 

 and here it is placed by Case in his " Revision of the Pely- 

 cosauria." Huene comes to the conclusion that the form is a 

 close relative of Paleohatteria 



"Hieraus folgt, dass Callibrachion nichl zu den Pelycosaurien 



wohl als einer ilnvr dnvktee Xarlikmmnen aufzufassen 1st.' 7 



He is then of the opinion that the earlier authors were right 

 in assigning Callibrachion to the Protorosauria. There are 23 

 presacral vertebra? whch are amphiccelous as in the Paleohatteria. 

 The coronoid process is wanting in Callibrachion. 



RoyL. Moodie. 



PARASITOLOGY 



The Sleeping Sickness Bureau, recently established in London, 

 has begun the publication of a bulletin. The first number 

 (October, 1908) is devoted to a review of the "Chemotherapy 

 of Trypanosomiasis." The treatment of trypanosomiasis in 

 man. the biological accommodation of trypanosomes to chemo- 

 therapeutic agents and the treatment of experimental animals 

 are considered in succession. A bibliography of some 200 titles 

 concludes the number. Future issues of the bulletin will in- 

 clude all the current literature of trypanosomiasis. 



The following items excerpted from the summary of this mass 

 of experimental material are of primary biologic interest. The 

 use of any trypanocide by itself can not be justified. Combined 

 therapy has the advantage that each drug can be used in smaller 

 doses. The alternation of trypanocidal agents avoids the habit- 

 uation of the parasites to a single remedy which has been thor- 

 1 Centralblatt fur Mineral. Geol. Paleontologie, 1908, No. 17. 



