THE WHALEBONE WHALES OF THE WESTERN NORTH ATLANTIC. 



205 



and behind is a narrow, and rather irregularly cylindrical prolongation. (See pi. 27, 

 fig. 6 and text fig. 63.) 



Bambeke figures a quite similar sternum belonging to the skeleton in the 

 Museum at Gand, which he describes as shaped like " a nail, with a conical head " 

 (1, 61). Carte and Macalister's figure of the sternum of the Drogheda, Ireland, 



FIG. 58. 



FIG. 59. 



FIG. 60. 



FIG. 61. 



FIG. 62. 



FIG. 63. 



FIG. 64. 



FIG. 65. 



FIG. 66. 



BALJENOPTERA ACUTO-ROSTRATA LAC. EUROPEAN AND AMERICAN. STEBNUM. 



FIG. 57. NORWAY. AD. (FROM GERVAIS.) FIG. 58. CROMER, ENG. AD. j. (FROM FLOWER.) FIG. 59. 

 BOULOGNE, FRANCE. AD.? (FROM FISCHER.) FIG. 60. NORWAY. AD. (FROM PHOTO.) FIG. 61. NORWAY? 

 (FROM ESCHRICHT.) FIG. 62. GREENLAND. IM. ? (FROM ESCHRICHT.) FIG. 63. HARWICHPORT, MASS. IM. 

 (FROM A PHOTO.) FIG. 64. BELGIUM. JR. (FROM VAN BAMBEKE.) FIG. 65. DROGHEDA, IRELAND. JR. 9. 

 (FROM CARTE AND MACALISTER.) FIG. 66. BRETAGNE, FRANCE. JR. (FROM GRATIOLET.) 



specimen (14, pi- 6, fig. 1) shows it to be elongated heart-shape, with a posterior 

 prolongation. This form is totally unlike that of any other specimen of the species 

 hitherto figured, except the Bretagne specimen cited by Fischer (44, 87, pi. 3, fig. 

 1). In the latter the sternum consists of an oblong ossified central portion sur- 

 rounded by a somewhat cruciform cartilaginous portion. The osseous part bears a 

 resemblance to the sternum of the Drogheda specimen. (See text figs. 57-66.) 



