228 LILLJEBORG ON THE 



According to Rasch, the length of the males is 9', and that of the females 8'. It is of a 

 rather elongated form, with the nose sharply pointed, although short, and limited behind by a 

 conspicuous notch. The greatest thickness of body is below the dorsal fin. Dorsal fin somewhat in 

 front of the middle of body, rather high, and directed backwards, in shape veiy much resembling 

 that of the preceding species. The dorsal fin was, according to Rasch, 1' 10" (Norwegian 

 measure), high along the anterior edge from base to point, in a specimen of which the length was 

 near 9'. Length of pectoral fins from the anterior edge at the base 1' 3"; distance between the 

 points of the caudal fin 2' 3". Length of nose, from the notch, somewhat over 2". Colour : — The 

 nose, and all the upper parts of the body and the fins, bluish-black ; lower jaw and lower side of 

 body, white. The white colour extends along the sides of the head to the upper edge of the eyes, 

 and runs into a point above the angle of the mouth. There is an oblong white spot on the sides 

 of the hinder parts of the body, which above and towards the tail is continued by a brownish-grey 

 spot. 



The nose is 8," long, in a skull 16" in length, and just twice as long as its width at the 

 base. Smallest width of pars occipitalis 7?"- Width across the anterior dilated part of ossa 

 zygomatica 8". Length of nose 2| times the width of the area just before the blowers. The row 

 of teeth extending more than half the length of the lower jaw, which is 132" in length. The inter- 

 maxillary bones form a low ridge on the upper part of the nose. The lower side of the nose is 

 without fossæ. The nasal and frontal bones unite into an elevated tubercle. Teeth |fz|?. I 

 counted 15 dorsal vertebræ in a skeleton in the museum in Christiania, 23 lumbosacral, 37 

 caudal, and 24 processus spinosi inferiores -^ altogether, with the 7 cervical, 82 vertebrae. The 

 sternum consists of 3 bones, the foremost of which has a long process directed backwards on each 

 side in front of the middle. There are 4 pairs of true ribs, and the 5th pair are united to a cartila- 

 ginous extension of the sternum (the skull, sternum, and ribs are described from the skeleton 

 from the Faroe Islands). 



It has appeared in Christiania Bay, as well as on the western coast of Norway. A 

 whole shoal, numbering 22, were once caught at the former place in the month of June, according 

 to Rasch. It is sometimes caught in the sea off Bergen. The capture in Christiania Bay 

 shows that these, like most other dolphins, are social, and go about in large numbers. 



4. D. Tdusio, (r. Ciivier. Bottle-nose Dolphin. Siuedish '^ OYQ?,vm." 



T/te triangidar area in front of the blowers, on the upper side of the upper jaio, resembling 

 that of the last. Teeth varying from 20 to '2>q, generally 22 — 24, on each side of the jaws. 



Delphinus tursio?, O. Fabricius. Fauua Groenlandica, p. 49, 1780. 



— DELPHIS, J. Hunter. Philosophical Transactions of the Royal Society of 

 London, vol, Lxxvii, p. 477, tab. xviii, 1787. 



I have counted 35 caudal vertebræ and 25 processus spinosi inferiores in a skeleton from the 

 Faroe Islands. The number of caudal vertebræ seems to be subject to some variation. 



