18/G.] MR. J. W. CLARK ON DELPH1NUS ALBIROSTRIS. 687 



The principal dimensions were as fellows : — ft. in. 

 Length, from anterior edge of upper lip to notch in middle 



of caudal fin 5 5| 



From upper lip to posterior edge of blow-hole (following curve) I 1 



From upper lip to anterior edge of dorsal fin (following curve) 2 (i 

 From anterior edge of dorsal fin to notch in middle of caudal 



fin (following curve) 3 4 



Length from upper lip to notch in middle of caudal fin (fol- 

 lowing curve) 5 10 



Height of anterior edge of dorsal fin (following curve) .... 10^- 



Total vertical height of the same (i 



From upper lip to junction of anterior edge of pectoral fin 



with the body 1 2\ 



From tip of snout to navel (marked by a black V-shaped 



spot | inch long) 2 G 



From tip of snout to pudendal orifice 3 Of 



From tip of snout to anus 3 10 



From upper lip to angle of mouth 7-f 



From upper lip to anterior angle of eye 9| 



Length of eye-aperture 0^- 



From posterior angle of eye to ear-aperture 1 1 



From angle of mouth to anterior angle of eye l| 



Pectoral fin, length from junction of anterior edge with body 



to tip 1 



Pectoral fin, from junction of posterior edge with body to tip 7 \ 



Pectoral fin, breadth at base 5 



Pectoral fin, greatest breadth Ah 



Breadth of caudal fin across the flukes 1 'A 



Vertical height of body, at the eye 8f 



,, ,, ,, immediately behind the pectoral . . Oil 



„ ,, ,, immediately in front of the dorsal fin 113 



Width between the pectorals. 5.' 



Belaud the dorsal fin the body becomes rapidly compressed, as 

 will be seen from the accompanying figure. 



inches. 

 At 85 inches behind the dorsal fin, the width was 5 

 -\ t 1 Ti 1 2 -1 



At2I| „ „ „ U 



The vertical height at the first position was 8 inches, at the second 

 (i^ inches, and at the third 3|- inches. The line of the back sloped 

 gradually to the caudal fin; the ventral line, at a point 10 inches 

 distant from the central point of the fin, turned upwards rather 

 abruptly and suddenly. 



The front part of the head was rounded between the eyes ; but 

 the upper lip was separated from this by a deep furrow on either 

 side, and projected forwards exactly like the peak of a cap. The lip 

 was 2 inches broad at its extreme anterior point, where the furrows 

 are | inch apart, separated from each other by a ridge, and it nar- 

 rowed gradually to a breadth of half an inch at the angle of the 

 mouth. At a distance of 1 \ inch from the tip ot the upper lip were 



