332 The America,, XaturaliA. 



r-M-ni 



renal vein (rvi) to empty into the left common iliac. This < 

 from the normal in postcaval structure is by no m 



Letters in the figure, not referred to in the text are as follows : da. 

 dorsal aorta, cax. coeliar axis, a. m.s. anterior mesenteric artery, rv. 

 vein from right kidney, Rj. right kidney, R 2 . left kidney, or. and ari. 

 left and right adrenal bodies with accompanying veins. 17 left and 

 right common iliaes, U,„i,. iliolumbar veins ,/ ureters, umciist urinary 

 bladder. — F. L. Washburn, Biological Laboratory, University of 



Zoological News.— Mr. O. F. Cook has published a monograph 

 of Scytonotus. He considers this genus to be the most specialized of 

 the Polydesmid Myriapoda, basing his conclusion on its secondary 

 sexual characters. He recognizes nine species as belonging to the 

 genus. (Ann. New York, Acad. Sci., VIII). 



A gigantic Cephalopod, supposed to be a new species of Architeuthis, 

 was driven inshore on the eastern side of the bay of Tokyo. A descrip- 

 tion of it, illustrated with di i vings, is published by K. Mitsukuri and 

 S. Ikeda. It is characterized by shape of its fins and of its beaks, the 

 unequal lengths of the sessile arms, and other minor details. (Zool. 

 Mag., Vol. VII, 1895). 



Prof. Gegeubaur has i aes Jahrbuch for the year 



1895, instituted a study of the clavicle and the elements adjacent to it 

 and the scapular arch. He calls attention to the fact that there are 

 two elements in the position of the former in Dipnoi, Crosopterygia 

 and Chondrostei. He then shows that the element nearest the scapula 

 is retained in some of the Stegocephalia, while the anterior and distal 

 element is increased in length. He calls the former the cleithrum, and 

 retains for the latter the name clavicle. The clavicle only remains in 

 the existing order of Batrachia, and higher groups, while the cleithrum 

 only remains in the higher fishes, beginning with Lepidosteus and 



According to Dr. Delisle the cranial capacity of the Orang-Outang 

 averages 408 cubic centimeters. (L'Anthropologie Tome, VI, 1895.) 



Ranke's researches show that the weight of the human brain is much 

 greater in proportion to the weight of the spinal cord than in any other 

 vertebrate. (Correspondenzblatte). 



Dr. E. Rosenberg publishes in the Morphologisches Jahrbuch for 1895, 

 an investigation into the reduction of the number of the incisor teeth 

 which is seen in the human species. He shows : first, that the loss of 



