276 REPORT ON ZOOLOGY, MDCCCXLIV. 



C. Jiiger gives a short essay in Muller's 'Archiv,' S. 70, upon position and 

 construction of the teeth in the Walrus. He arrives at the views of Rapp 

 and Stannius, and makes mention of a difference in the form of the lower 

 jaw, the rami of which have occasionally a rather straight direction, at other 

 times a correspondent sweep outwards. 



CETACEA. 



i 



A treatise upon the olfactory organ of Whales in general 

 and of the Delphinus Delphis and Tursio, is given by A. 

 Alessandrini, in the Nov. Commentar. Acad. sclent. Instituti 

 Bononiensis, vi, (1844) p. 141. 



It contains an elaborate description of the olfactory organ, in reference to 

 the question as to whether in the Whales, and especially the Dolphins, a 

 proper olfactory nerve be present or not ; it speaks clearly of its occurrence 

 in the first, and shows how it has happened in dissections of these animals 

 to have been not unfrequently overlooked. 



Lesson has given a description of Bahvnoptera rostrata, from a young 

 animal stranded in the year 1S45 on the coasts of the Chareute. (Actes de la 

 Soc. Linneene de Bordeaux, xii, p. 16.) Eschrieht continues his interesting 

 investigations upon the northern Whales in the ' Forhandlingar vid. de 

 skand. Naturf. Stock.,' 1843, p. 203, translated in ' Isis' 1845, S. 419. He 

 at present believes with tolerable certainty in the existence of two large and 

 two small species of corrugated Rorqual in the north. In the 'Isis,' 437, 

 he communicates his observations upon the Hyperoodou or Bottle-head, and 

 takes the opportunity of entering upon its confused synonymy. 



Fitzinger's description of the Halitherium Christoli was given in the 

 < Jahrb. firr Min.,' S. 382. 



H. Schlegel, in his ' Abh. aus dem Gebiete der Zoologie und vergl. Anat.' 

 2tes Heft, avails himself of the opportunity afforded him by a Delpliinns 

 orca and Baltsnoptera arctica being stranded upon the coast of Holland, to 

 give exact descriptions and drawings, perfectly true to nature, of both. 



