34 



BULLETIN 73, UNITED STATES NATIONAL MUSEUM. 



diameter. Both upper and lower jaws nearly to the angle of the mouth are cream 

 white. On the sides and belly the gray color is speckled with black spots of about 

 the size of a grain of wheat. The pectoi'al fins are dark gray above and below; 

 the flukes were similarly colored. 



A comparison of the dimensions of the two specimens above described with 

 those of European and New Zealand specimens is afforded by the following table 

 (the measurements bemg reduced to percentages of the total length): 



External dimensions of Ziphius cavirostris. (Reduced to percentages of the total length.) 



Measurements. 



Total length 



Tip of snout to posterior margin of dorsal. 



Tip of snout to axilla 



Tip of snout to eye 



Tip of snout to anterior end blowhole 



Length of mouth 



Breadth of blowhole 



Length of pectoral from head of humerus. 



Length of pectoral from a.xilla 



Greatest breadth of pectoral fin 



Vertical height of dorsal fin 



Breadth of flukes, tip to tip fin 



Newport, 



Rhode Island, 



49599 U.S..N..M., 



male, 1901. 



Fl. in. 

 "20 1 



Per cent. 



69.0 



25.3 



* 12. 2 



11.2 



5.4 



2.3 



10.8 



''7.5 



12.4 



4.1 



26.1 



Ft. in. 

 MS G 



Per cent. 

 74.8 

 28.0 

 13.3 

 12.6 



5.9 



2.5 

 11.7 



8.1 

 I 2.6 



4.5 

 28.4 



Barnegat 



City, 



New 



Jersey, 



20971 



U.S.N.M., 



female 



1883. 



Ft. in. 

 6 19 4 



Per cent. 

 67.2 

 <;20.0 

 10.8 

 10.4 

 «5.0 

 2.2 



2.9 



5.2 

 28. 



New 

 Brighton, 



New 

 Zealand 

 female. 



Ft. in. 

 19 6 



Per cent. 



[67.1 



<i24.4 



12 8 



6.4 



2.6 



7 12.8 



3.0 

 3.4 



31.2 



Punta, 



Corsica, 



1842. 



Ft. in. 

 19 



Per cent. 

 [78.5] 



S8.3 

 2.9 

 3.5 



Buenos 

 Ayres, 

 Argen- 

 tina, 

 male. 

 1865. 



Ft. in. 

 12 1» 



Per cent. 

 [70.8] 

 [25.0] 

 10.9 

 11.4 

 /5.3 

 1.2 



3.0 



4.3 



27.3 



Curvilinear. 

 6 Straight. 



c To anterior base. 



d Lower jaw to "l>ocinning of pectoral." 



' From tip of upper jaw. 



/ From tip of lower jaw. 



s Points of measurements not specified. 



* From the bones; from outer anterior margin of pro.ximal expansion of ulna. 



* .\long center. 



1 From the bones. The external measurement originally taken by ScoUick is entirely too large. 



* The skull gives this measurement as 10.4 per cent. The original measurement by ScoUick Is entirely 



too large and can not bo correct. The same is probably true regarding length to blowhole, but I 

 can not prove it. 



The close correspondence in proportions shown in tiiis table favors the idea 

 of specific identity, and taken with the similarity in size, and characters of the 

 skull, warrants, I think, the assumption that the specimens from the Atlantic 

 coast of the United States belong to Z. cavirostris. 



COLORATION. 



It should be remarked, however, that the Barnegat City specimen does not 

 agree in color with any of the European or New Zealand specimens. On the other 

 hand, the latter show a most extraordmary diversity in color, some being black, 

 with the head and back as far as the dorsal fin white; others all black above, white 



