On two subfossil Whales discovered in Sweden. 



25 



processes are thinner at the point, less inclined backwards, and have, when 

 viewed from above, the concavities at the base in the fore and hinder ed- 

 ges about equal. Both this and the following- vertebrae are without ridge 

 on the under side of the corpus. 



The 3 rd lumbrosacral vertebra (PI. III. figg. 21, 22, 23) likewise 

 closely resembles the first, but its corpus has the upper edge of the fore 

 end straight, and the convexity, along the middle of the under side is 

 stronger; the foramen spinale is smaller, and its breadth greater than its 

 height; the lateral processes stand out almost at right-angles, and the pro- 

 cessus spinosus both in this and the preceeding vertebra is very slightly 

 more inclined backwards than in the first. Dimensions of this vertebra: 

 Breadth of corpus 9{"; height of d:o 7-f"; length of d:o 8|"; heigth of 

 the vertebra to top of processus spinosus 21"; distance between extremities of 

 processus transversi 2' llj'; length of processus transversi 13"; length 

 of processus spinosus about 12"; distance between external edges of pro- 

 cessus mammillares 6". 



The lumbosacral vertebra, which we take to be the 5 th is similar to 

 the 3 rd above described, but has its lateral processes sensibly broader 

 (6" broad, while those of the 3 rd are but 5^"), and along the middle of the 

 under side of the corpus is an evident though not sharp ridge. In this as 

 also in the folloving vertebra the lateral processes are still a little inclined 

 backwards. 



The 6 th lumbosacral vertebra (PI. IV. figg. 24, 25, 26) is similar 

 to the 5 th , but has the anterior end of the corpus more rounded, with the 

 tsansversal dimension but inconsiderably larger than the height, The broader 

 part of the lateral processes extends more nearly to the base, and their 

 greatest breadth is in the middle x ) , and the ridge along the middle of the 

 lower side of the corpus is sharper. The foramen spinale is little, and some- 

 what broader than it is high. Dimensions of this vertebra: Breadth of cor- 

 pus in front 9j"; height of d:o 8*"; length of d:o 8f"; distance between 

 the extremities of the lateral processes 3' 1"; length of right lateral pro- 

 cess 14 and of left d:o 13|" ; breadth of the right d:o 6-^-: and of the 

 left d:o 5-F. 



The vertebrae, which we take to be the 9 th 10 th and 11 th lumbosa- 

 cral vertebrae, are distinguished from the just described by a somewhat 

 higher corpus and by shorter lateral processes, standing out at right angles, 



') In the second the hroadest part of the lateral processes is nearer the ex- 

 tremity. 



Nova Acta Reg. Soc. Sc. Ups., Ser. HI. Vol. VI. 4 



