41 



Measurement of different skulls in the British Museum. 

 The particular localities are unknown. 



The most prominent difference between the specimens 

 was in the width of the upper jaw in front of the notch, 

 just over the commencement of the teeth-series ; but I 

 could not find any other character in connexion with it. 

 There is also a slight difference in the form of the palate ; 

 in a, the central ridge is narrow and rounded above be- 

 hind ; in b, it is broad, flat, sharp-edged, and very deeply 

 concave on the sides, under the edges, but the different 

 specimens vary in this particular. In d and ff the hinder 

 part of the palate, near the entrance of the inner nostrils, 

 is sharply keeled ; and in a the two ridges are rounded. 



I am by no means certain that with a larger series of 

 skulls in a perfect condition, and with the animals they be- 

 longed to, it might not prove that there are more than one 

 species amongst these skulls. 



In all these skulls the intermaxillaries are seen below, 

 forming a slender, elongated, triangular space in the front 

 of the palate, and in some the vomer is also more or less 

 seen in the middle of the palate ; but the absence and pre- 

 sence of this bone in the palate, which Mr. Owen appears 

 to regard as important in the distinction of species (see 

 ' British Fossils,' p. ), is of very little consequence, at 

 least in this species. 



In the British Museum there is a foetus, figured with its 

 tongue in detail at (Tab. 26.), which probably belongs to 

 this species ; it formed part of the collection of Sir Hans 

 Sloane. 



It differs from the foetus oi Lageuorhijnchus acxtiit in the 

 nose, being more i)roduced (nearly J the length of the dis- 

 tance from the end of the nose to the eye), it has seven 

 black rigid bristles on each side, the two front, rather 

 the largest, are on the side of the u]iper ))art of the nose, 

 and the five hinder forming a descending line nearly parallel 

 to the groove which separates the beak. The tongue is con- 

 vex on the sides, with a rather narrow flat space on the 



hinder part separate from the under sides by a sharp en- 

 tire edge, the front is rather dilated, sharp-edged and ob- 

 scurely crenated. 



The Janira. Delphinus Janira. 



Tab. 23. Skull. 



Del])hinapterus Peronii, Mus. Bristol Tnstitution. 



Skull roundish ; nose depressed, half as long again as 

 the head ; triangle rather in front of the tooth-line ; inter- 

 maxillaries very convex behind, with a wide groove be- 

 tween, above in front ; palate with verj' wide, deep grooves 

 on each side, extending § of the length, centre ridge flat- 

 tened in the middle, the intermaxillaries forming a long 

 triangle in front ; teeth ^l- 



Inhab. Newfoundland. Presented to the Bristol Institu- 

 tion by G. Thome, Esq. 



Skull, length entire 

 Head 

 Nose 



Lower jaw .... 

 Width at orbit .... 

 Notch 

 Middle of beak 



17-10 inches & lines. 



61 

 11-9 

 12-6 



7-8 



4-3 



2-5 



This skull differs from the D. Delphis of the /Vtlantic, in 

 the beak being much shorter and narrower. 



The New Zealand Dolphin. Delphinus Novse Zelandias. 



Delphinus Noveb Zelandite, Qnoy et Gaim. Voij. Astrol. 

 49, /. 28. 



Teeth i| ; body elongated, rounded in front ; nose cy- 

 lindrical, rather flattened above ; black-brown, edge of the 

 upper jaw and beneath dull white, a yellow band from the 

 eye along the side to below the dorsal ; tail slate ; pecto- 

 ral and dorsal dull white, the latter dark-edged. 



Inhab. New Zealand and Cape Gable. 



Length, entire, 

 „ to blowers, 

 „ to eye, .... 

 „ to dorsal,.... 

 „ to pectoral, 



Width of caudal, .... 

 „ of pectoral. 



Height of dorsal, .... 



Circumference, 



5' 10 inches. 



11 



10 



2-8J 



1-5 



1-2J . 



4-6 



8i 

 211 



The following is probably the same. 



Dauphin a band fauve, Voij. Pole Sticl, t. 21,/. 1, t. 23, 

 /. 1, 2, not described. 



Skull in figure rather suddenly contracted behind ; nose 

 T^ of the entire length of skull, and 2|- times the breadth 

 at the notch; intermaxillaries convex; teeth ^J-^^. Skull 

 in Mus. Paris. Palate with a deep groove on each side ; 

 triangle to the teeth line. 



Inhab. Van Diemen's Land. 



The Sao. Delphinus Sao. 



Skull. Length 17-0, teeth-line 8-9, beak 10-6, width 

 at notch 3'7 ; beak elongate, shelving on the sides, with 

 central cartilage near half its length in front ; triangle to 



M 



