On two subfossil Whales discovered in Sweden. 



31 



and broader in the lower part rather nearer the lower end, than in the 

 4 th , as is the case also in a higher degree in the 2 nd pair; and as besides 

 the next pair, with which it might be confounded, have been found entire, 

 we conceive that we have full right to consider this fragment as belonging 

 to the 3 rd pair. 



The 4 th pair of ribs (PI. VI. fig. 50, the left) is distinguished by 

 considerable length and greatness, especially in the upper part, and more- 

 over by a complete capitulum collum and taberculum. They are also much 

 curved at the upper end. Their collnm is l" long. They are the largest 

 of all, though the succeeding pair is but little less, and in length surpasses 

 them. At about the beginning of the upper third of their length they have 

 on the outer border a very slightly marked obtuse angle, between which 

 and the tuberculum they are very broad. The tuberculum is about 2 " high, 

 and the collum almost triangular in cutting through. 



The 5 th pair of ribs is similar tho the last but rather slighter and 

 longer, 8' along the outer curve, and lias somewhat shorter collum. 



The 6 th pair of ribs (PI. VI. fig. 51, the left) are slenderer than 

 the foregoing and a little longer; also they are broader in the upper part 

 and with a more or less marked angle in the upper edge at that part. They 

 have also a distinct collum or capitular process, but it is much smaller, 

 and the capitulum is scarcely perceptible Those of this pair are the lon- 

 gest of all the found ribs. 



The 7 th pair of ribs (PI. VI. fig. 52, the left) are slenderer and 

 somewhat shorter than the preceeding, with the upper end concave, and 

 only a slight indication of a capitular process. They have the upper third 

 a little broader, with a scarcely perceptible notch or angle in the outer 

 border. 



The 8 th pair of ribs (PI. VI. fig. 53, the left) is somewhat less than 

 the foregoing, and is, like those which follow, entirely destitute of capi- 

 tular process, but has however the upper end concave. 



The 9 th pair of ribs (PI. VI. fig. 54, the left) is almost exactly si- 

 milar to the last but a little shorter, and has a pair of obtuse angles in 

 the outer border of the upper part, and the upper end but slightly concave. 



The 10 th pair of ribs (PI. VII. fig. 55, the right) is far shorter than 

 the 9 th , and has the upper end somewhat sqare, with a longitudinal shallow 

 concavity both on the front and back surfaces in that part. It has also 

 some bumps, of which one near to the summit, between the anterior and 

 exterior side, is the largest. 



