THE WHALEBONE WHALES OF THE WESTERN NORTH ATLANTIO. 259 
The Cape Lookout (N. C.) skeleton, the Cape Cod (Mass.) skeleton in the 
Museum of Comparative Zoélogy, and that in the Field Columbian Museum, have 
sterna closely resembling that of the Taranto skeleton (pl. 46, figs. 3 and 4), or 
rudely heart-shaped, but the skeleton in the American Museum, New York, has the 
sternum quite different from any of the foregoing (text fig. 87), being cruciform, 
like the sterna of some specimens of Balenoptera physalus L. One might almost 
believe that it did not belong to the skeleton to which it is attached. 
Considering the diversity of form in the sternum of the Finbacks, we need not 
be surprised at the lack of conformity among the various specimens of the Nord- 
caper. The sternum in these animals is of little service in discriminating closely 
allied species. 
In the Taranto (Italy) skeleton the sternum is 18 cm. high, 21 em. wide; in 
Guldberg’s Iceland skeleton, No. 1, 46 cm. high, 37.5 cm. wide; in the Cape Look- 
out (N. C.) skeleton at Raleigh, 30 cm. high, 88 em. wide. 
SCAPULA. 
The scapula of the Nordeaper has a peculiar and characteristic shape, which is 
quite well shown in Gasco’s figure of the Taranto whale (47, pl. 6, fig. 8). The 
glenoid, or posterior border, is evenly concave from the glenoid fossa half-way to 
Fic. 88 Fic. 89 FIG. 90. 
FIG. gl. Fic. 92. FIG. 93. 
BALZENA GLACIALIS BONNATERRE. AMERICAN AND EUROPEAN. SCAPULA. 
Fic. 88.—Lone Ip., New York. (Amer. Mus, NAT. Hist.) (From A PHOTO.) FIG, 89.—Ditéo. (FIELD 
Coxums. Mus.) Fic. 90.—Ditte. (U.S. Nat. Mus.) Fic. 91.—CHARLESTON, S.C. (FROMA PHOTO.) FIG. 92. 
Tyee oF B. cisarcrica. (OBLIQUE VIEW, FROM A PHOTO.) FIG. 93.—TARANTO, ITALY. (FROM GAsco.) 
