414 Dr. H. Burmeister on two Species (j/* Balasnoptera. 



and also by the skull, in which the maxillary bones are easily 

 separated from their sutures. Although the entire skeleton is 

 not shorter than that of the species described in the ' Boletin ' 

 (p. viii), the whole breadth is less, which is a proof that this 

 was a more slender species than that found last year. In 

 order to prove this difference, I give some of the principal 

 measurements of the cranium, naming last year's species Ba- 

 Imnoptera intermedia, on account of its affinity with the species 

 above described as i?.J9atoc^ow^ca, adding to these measurements 

 those of the third and much smaller species described as B. 

 honaerensis. 



Measurements in English inches. 



The vertebral column has had probably sixty-two to sixty- 

 four vertebrae — that is to say, four less than in the other species j 

 but not more than fifty-eight and a half have been preserved, 

 the end of the tail with the caudal fin having been cut off by 

 the sailors, who found the body of the animal floating in the 

 river. Each one of these vertebra has a smaller body than 

 the corresponding one in tlie other species, although its apo- 

 physes are a little longer and also rather broader. In order to 

 prove this remarkable diftercnce, I give the measurements of 



