SCANDINAVIAN CETACEA. 227 



Number of teeth on each side of upper and lower jaws 26 — 27. Dorsal vertebræ 16, lumbo- 

 sacral vertebræ 23, and caudal vertebræ 44, 32 of which carry processus spinosi inferiores ; 

 altogether, with the 7 cervical, 90 vertebrae.^ True ribs 5 pairs, and the 6th and 7th pair with 

 their sternal part united to a cartilaginous extension of the sternum. This bone consists of four 

 pieces, the foremost one of which has a more or less deep notch in. front. 



A lower jaw of a specimen that was stranded on a sandbank near Skanor,^ is preserved in 

 the Zoological Museum of the University of Lund; its length is 15|", the row of teeth 7|" long. 

 The teeth are 26. in number on one side, and 27 on the other, and are worn down at the 

 points. 



A skull of a specimen cauglit in the vicinity of Bergen, is kept in the museum there. 

 Although rather large, it has only 24 teeth on each side of each jaw. Our Scandinavian museums 

 contain also parts of two specimens and a skeleton of another, caught within the boundaries of 

 Sweden and Norway, two from Sweden, and one from Norway.^ It belongs to the North Sea, 

 and has also appeared off the coasts of England and Jutland. 



3. D. AcuTUs, Gray. White-sided Dolphin. 



Tlie triangular area before the blowers only slightly elevated behind, and with a level surface, 

 concave in front. Teeth 30 — 40, on each side of each jaw. 



Delphinus acutus, Gray. Specil. Zool. \, 2. — (According to Gray in Zool. Erebus 

 and Terror,) 1829—1830. 



— EscHRicHTii, H. Schlegel. Abhandlungen aus dem Gebiete der Zoologie 



und Vergleichende Auatomie, p. 23, tabs, i and ii, fig. 4 ; 

 tab. iv, fig. 5, 1841. 



— LEUCOPLEURUS, H. Rttsch. Dclphiuus leucopleurus. Nova species descripta, 



cum tabulis ii — Christianise, 1843. Nyt Magazin fur 

 Naturvidenskaberne, 1845, p. 97. 



— — S. Nilsson. L. c, p. 598. 



]Sfofe. — Schlegel states {loc. cit.), probably through a misprint, that it has 32 lumbosacral verte- 

 bræ. He has since, in a letter to Eschricht, corrected the statement of their number to 23, whereby 

 the difficulties of identification are removed (Eschricht verbally). 



^ Eschricht has stated 94 in the above-quoted treatise. Some vertebræ may possibly have been 

 missing on the skeleton ; 92 vertebræ are, however, given by the same author in his discourse at the 

 meeting of naturalists in Copenhagen, 1847 (Forhandl., p. 611). 



^ Skand. Fauna, Daggdjuren, p. 602. 



^ [Two females of this species were caught in July, 1862, at Gullholmen in Bohuslan 

 (Sweden), both pregnant, each with a foetus about 3 feet in length. The skeleton of one was 

 preserved by F. A. Smith, Acad. Docent., and transmitted to the zoological museum of this 

 university. Its length is 6' 20". Length of skull 18", its width 9|" across the temporal bones. 

 Length of nose 9". Ribs 15 pair, the last pair of which are not united to the transverse processes. 

 Lumbar vertebræ 24. Teeth §11.-1865.] 



