234 LILLJEBORG ON THE 



54 vertebræ. All the lumbo-sacral vertebrae are keeled on the lower side of the corpus ; but this 

 keel assumes, on the first caudal vetebra, the appearance of a wide, flat ridge. On the last dorsal 

 vertebra there appears also a ridge on the lower side of the corpus, but it is here obtuse. Pro- 

 cessus spinosi iuferiores 14. The 14 last caudal vertebræ entirely without processus transversa 

 I have, unfortunately, not taken any notes of the sternum. Eive of the 12 pair of ribs are costæ 

 verse, and the 6th is united to a cartilaginous extension of the sternum. The 1st to 7th pairs have a 

 long collam, and their capitula articulate with a conspicuous articulating area upon the corpora 

 of the vertebrae, which are placed next before those, to the processus transversi of which the 

 tubercula of these ribs are articulated. The capitula of the 1st pair articulate with the corpus 

 of the 7th cervical vertebra. The carpus and metacarpus have each 5 bones ; fingers 5. The thumb 

 has only 1 phalanx, which terminates in cartilage. The fore-finger, which is the longest, 

 has 6 phalanges, and, from its appearance, has probably had 7 ; the middle finger has 4, the 4th 

 finger 3, and the little finger 1, and has probably had 2. 



I have had the opportunity of examining five skeletons of the succeeding smaller species ; two 

 of these quite complete, and from old males, on which the sutures of the sternum had disappeared, 

 and with firm and hard bones, are preserved in the museum in Bergen ; and three are preserved 

 in the Physiological Museum in Copenhagen.^ The skeleton just described offers the following 

 peculiarities in comparison with these, especially with those in Bergen, which have been more 

 minutely examined. In the first place it is much larger. One of the skeletons in Copenhagen, 

 was 17^ long, being the largest of these five ; the two in Bergen were next in size, being of almost 

 equal size, and differing but little from the skeleton in Copenhagen just mentioned, the one 

 16' ll" in length, the other 15' 8i". The specimen described by Schlegel was 16' 3" (Rhenish) 

 in length, therefore nearly equal to those at Bergen; this length seems, consequently, to be 

 comiuon for full-grown specimens of the following species. II. It is distinguished by having 

 12 dorsal vertebrae and 12 pair of ribs, while the others, even the one described by Schlegel, have 

 only 11. III. Its head is more elongated. Its width at the orbits is about half its length. The 

 width is much larger, comparatively, in the others, of which the three largest present the closest 

 resemblance in regard to the head, which was 36" long and 21" wide. IV. The tubercle 

 formed by the frontal and nasal bones is much higher than in the smaller species, where it is not 

 very high, and is directed backwards. V. All the cervical vertebræ except the 7th are united 

 by their spinous processes, and the first three also by their bodies, while in the following species 

 only the 3rd and 4th cervical vertebræ are united by their spinous processes, and only the first two 

 by their bodies. The specimen described by Schlegel agrees in this respect with those examined 

 by me. VI. All the teeth have obtuse and worn-down points, while in the following only the 

 front teeth have obtuse points. VII. The carpal bones are 5, and in the following species only 

 2, at least on the skeletons in Bergen. I did not observe those on the skeletons in Copenhagen, 

 and they are not mentioned by Schlegel. VIII. The second finger has one or two more phalanges, 

 and the 3rd and 4th one more than in the following, according to observations on the skeletons 



inclusive, so that it is the first of the caudal vertebræ that participates in the articulation, or the 

 attachment of the first of these bones. 



^ [Professor Eschricht has since (f Om Spækhuggeren,' Overs, over det Kongel. Danske Videnskab. 

 Selskabs, Forh. 1862) demonstrated that two of these belong to another species. — See the second 

 memoir in the present volume.] 



