398 ADDITIONS AND COEEECTIONS. 



Length from end of snout to tip of tail 6 feet 7| inches ; the other 

 measurements are nearly the same as in D. Moorei. 



The skulls show that these species belong to the restricted genus 

 DeJphinus, which has D. Delphis for its type. These have a very 

 deep groove on each side of the palate. 



Fig. 100. 



Delphinus Walkeri. 



Both the figures of the animals belonging to these species have a 

 narrow black streak from the base of the upper part of the beak to 

 the eye ; but the colours of the sides of the animals are differently 

 distributed. There is also a very slight difference in the form of the 

 bladebones (and this cannot be sexual, as they were both females), 

 and in the form of the back part of the palate just in front of the 

 hinder entrance to the nostrils. 



Considering that the colouring of the animals shows that they repre- 

 sent two species, one is struck with the very small difference exhibited 

 in the skull by species showing such marked external differences, 

 and can only conclude by thinking how hasty we have been when 

 we have referred skulls received from very distant parts of the world 

 all to Delphinus Delphis, and said that that species had a very wide 

 geographical distribution — more especially when we consider that 

 these two species were obtained, the one in lat. 35° 38' S., long. 

 10' E., and the other in lat. 34° S., long. 7° 3'W. 



DelpMnus Janira (page 245), add : — 



a. Skull. Jamaica. Presented by J. H. Gurney, Esq. Length of 

 skull 16 inches, of beak 9|-; width at notch 3^. Teeth 47/, 

 five in an inch length of maxilla. 



The beak of the skull twice and three-quarters the breadth of the 

 notch in length. 



After Delphinus Janira, (at page 246) add : — 



Delphinus punctatus. 



The beak of the skull once and a half the length of the brain- 

 cavity, depressed behind, and gradually tapering and rather slender 

 in front, in length nearly three times the width at the notch. Lower 

 jaw attenuated and slender, and rather bent up in front, without 



