1901.] AKATOMY OF COGIA BREYICEPS. 109 



This total is obtained by adding together the measurements of the 

 separated head (1 ft. 1 in.), trunk (5 ft. 10 in.), and tail (1 ft. 

 7 in.) ; it is, therefore, liable to a small error owing to shrinkage 

 of the flesh, and to the fact that the tape would follow slightly 

 different lines and curves in the three separate pieces, instead of 

 one line ; but the error cannot be greater than an inch or two 

 one way or the other. 



At any rate this specimen is considerably longer than the female 

 described by Von Haast, which was 7 ft. 2 in. long, and much 

 longer than Owen's Indian male, which was only 6 ft. 8 in. 

 Flower and Lydekker state that the adult may attain a length of 

 10 feet, and the head is about one-sixth of the length of the body ; 

 from the above it is seen that the head is contained in the total 

 length 6i times, or in body alone 5j times. 



This was the only measurement I took, for naturally the cir- 

 cumference &c. could not be measured with anything approaching 

 accuracy. 



The pectoral fin measured 14 inches in a straight line from base 

 to tip, or 15 inches along the curved anterior margin ; it was 

 5 inches across the oblique base of attachment, 5| across the 

 wddest part. 



The shape of the fin does not differ much from that usual in 

 the Cetacea ; its anterior margin is slightly convex ; its posterior 

 margin is angulate, the rounded angle being enclosed by a short 

 proximal limb of 4 inches, and a longer distal limb of 8 inches, 

 which is slightly excavated. 



The colour of the fin was very dark grey on the upper surface 

 — probably black in life ; for in the young Rorqual the jet-black 

 of the fresh animal gave place to a dark grey after exposure to air 

 for a few days. The under surface of the flipper was yellowish 

 white ; but the dark tint of the upper surface passes round the 

 margin and comes on to the lower surface, so that there is a narrow 

 black margin nearly all the way round. 



The "flukes" measured 2 ft. 3 in. from tip to tip ; the notch 

 Mas 5| in. deep, i. e. from a line joining the tips ; and the distance 

 from the base of origin of the flukes across the lobe, parallel to 

 the long axis of the body, is 12 inches ; the flukes are black below. 



II. The Nasal Passages. 



The top of the head had suffered like the other parts of the 

 body, and much of the flesh anterior to the blowhole had been cut 

 away. There is but a single blowhole as in other Odontocetes ; 

 it is not median in position nor symmetrica] in shape. 



It is a crescentic slit, situated just to the left of the median 

 line, with 1 lie horns of the crescent directed backwards and slightly 

 towards the middle line (PI. VIII. fig. 1), so that its concavitv is 

 backwards '. 



1 In the Porpoise, Grampus, and others, the blowhole, situated on the right 

 side of the top of the bead, In- it- eonoavity forwards. In Phystter it is on 



the left side, slightly sigmoid and near the anterior end n|' tin .snout. 



