WHITE-SIDED DOLPHIN. 471 



] 835 to the late Dr. Knox of Edinburgh, who described 

 it under the name of D. tursio ; but its skeleton, which is 

 still preserved in the Museum of Science and Art at 

 Edinburgh, proves it to belong to this species. In August 

 1858, a small shoal of about twenty Dolphins were 

 captured in Scalpa Bay, near Kirkwall, and a description 

 and plate were given by Dr. A. R. Duguid in the " Annals 

 and Magazine of Natural History " for 1864. According 

 to that gentleman this species is often seen about the 

 Orkneys by the fishermen, but is rarely secured. 



The colour of the White-sided Dolphin is a deep black 

 above, and a pure white on the throat and belly. On each 

 flank is a short broad stripe of pure white, above and 

 behind which is a band of yellow or brownish -grey, 

 either confluent with the white mark or narrowly sepa- 

 rated from it. These markings appear to be very regular 

 and give the animal a most attractive appearance. 



The rostrum of the skull is slender and tapered. The 

 teeth are small and seem to vary from twenty-eight to 

 thirty-eight in each side of either jaw. In one of Dr. 

 Duguid's specimens the formula was -ff^f-|. The skeleton 

 has about eighty vertebrae and fifteen pairs of ribs. 



The adult attains a length of six to eight feet. The 

 following are some of the measurements of a male (Dr. 

 Duguid) and of a female (Dr. Knox) : 



Male. Female. 



Ft. In. Ft. In. 



Total length (following curve) ..836 5 



Greatest girth . . . . , . 4 34 3 24 



Length of flipper . . . . . 1 44 10 

 Breadth of tail . . . \- . 2 1 1 2 



Our figure is from Dr. Duguid's plate in the " Annals 

 and Magazine of Natural History " for 1864. 



