240 LILLJEBORG ON THE 



The beak of the skull rather short and obtuse (but not so nmch as in the preceding species), 

 and shorter than the hinder part of the head. Symphysis of the lower jaw short (shorter than 

 half the length of these bones). The skeleton generally is distinguished by a greater number of 

 vertebrae than in the preceding genus. 



It seems that only one species of this genus is known, belonging to the North Sea, the 

 Northern Atlantic, and the Polar Sea. 



1. Ph. communis. Lesson. Common Porpoise. Swedish " Turalare." 



J rather high tubercle on each of the intermaxillary hones in front of the hloioers. Teeth 

 20 — 28 on each side of the jaws. 



Delphinus fhocæna, Linné. Fauna Sueciya, p. 17. 



— — Lacépede. L. c, p. 287. 



Phocæna coMiMUNiSj Lesson. Manuel de Mammalogie, p. 413, 1827. 



— — F. Cuvier. L. c, p. 171, tab. xii, fig. 1. 

 Delphinus phocæna, S. Nilsson. L. c, p. 616. 



Length 4' — 6', generally 4' — 5'. Thickest part of body nearly under the beginning of the 

 dorsal fin, therefore somewhat before the middle. The head in front, above the nose, is strongly 

 convex. The body tapers considerably towards the caudal fin, particularly when seen from 

 above, as it is very much compressed posteriorly. Back broad and rounded. Height of dorsal 

 fin, which is about the middle of the body, considerably less than its length at the base. 

 Pectoral fins rather small and narrow. A stuffed specimen, 4' 2" in length, had the dorsal fin 

 4" high and 8" long at the base, the pectoral fins 71" long from the front edge of their base, and 

 the caudal fin about 12" vi^ide between the points of the lobes. Colour: — above, black; beneath, 

 vi^hite, without any distinct limits. All the fins black, and the black colour extending from the 

 caudal fin over the part of the body next to it, or the tail. Lower jaw black in front. A black 

 streak runs from the anterior edge of the pectoral fins under the eyes into the black colour on the 

 sides of the head. The white colour extends partly upon the sides of the body, and is there 

 sprinkled with fine spots of a blackish-grey colour. Skin shining. 



A skeleton of an old female that was shot near Stockholm last summer is now preserved in 

 the Anatomical Museum here, and offers the following characters :— Length of skeleton 4' 9^". 

 Length of skull lU" ; width of skull across the processus zygomatic! of ossa frontis 5|" ; width across 

 ossa frontis, before orbits, 4|". Nose 41" long, and 2f" wide at the base, and considerably shorter 

 than the hinder part of the skull. Teeth line in the upper jaw 4" long. Lower jaw 8^" long, its 

 row of teeth 31". On each of the intermaxillary bones, before the blowers, a tolerably high, oblong, 

 and uneven protuberance. The frontal and parietal bones form a rather high protuberance 

 behind the nasal bones. Vomer visible only at one place on the lower side of the upper jaw, 

 between the hinder points of the intermaxillary bones, which also are visible there. Teeth gzi 

 (I counted 24 teeth on each side of each jaw in a skull at Lund) ; round at the base, compressed, 

 and with rounded margin at the crown. All the cervical vertebrae, except the 7th, ankylosed 

 together ; but the sutures have disappeared only between the first three. Dorsal vertebrae 13, lumbar 



