266 DE. J. MUEIE ON THE OEGANIZATION OF THE CAAING WHALE. 



and oddly situated. At first I thought these were unknown, but found they had been 

 incidentally noticed by Hunter' and Gulliver^ Williams% and Jackson". The two 

 latter entirely misconceived their true nature, thinking them the product of diseased 

 tuberculous deposits. That they are not of pathological origin I am certain, and, 

 moreover, found them well developed at the same spot in Risso's Grampus. In the 

 female under present consideration the bodies in question lie at the sterno-ventral 

 corner of each lung, and upon the pleural bridge already spoken of (consult respec- 

 tively figs. 49, 50, & 51). They appear as two raised, oval, or even somewhat reniform, 

 glandular bodies, each about a couple of inches long and an inch or so in widest dia- 

 meter, covered by opaque pleural membrane ; yet the surface of the lungs themselves, 

 but more especially their pectoral aspect, shows that they are overspread by a series of 

 parallel sinuous veins and arteries. These converge to the glands at the pleural bridge, 

 send a few twigs into their substance, but almost wholly pass over and underneath them 

 to large vessels close by. The latter I shall take into consideration along with the 

 circulatory organs. Regarding the structure of each glandular body, it is firm, as 

 Gulliver says juicy, and texturally in all respects resembles a lymphatic. It is not, 

 therefore, a blood-reservoir, as I was inclined to deem it; for I convinced myself by 

 injecting the vessels hard by. It was then I became fully satisfied of Mr. GulUver's 

 mistake, who considered the linear pulmonary tracery to be lymphatic vessels running 

 to the glands. There are many lymphatic vessels in the neighbourhood, it is true ; but 

 these are very secondary, compared with the blood-channels, in producing the radial 

 pulmonary lines from the glands, so very obvious even on casual inspection. Besides 

 the more prominent pair of glands, there are, particularly in Grampus rissoanus, some 

 smaller deeper ones adjoining the larger. 



VI. Sanguiferous Distribution. 



1 . The Heart. — This bulky organ agreed sufficiently with Dr. WHliams and Jackson's 

 notice of its exterior ; and the cavities and valves so corresponded mth those of other 

 large Fia-Whales', save in one most unusual circumstance, that I need only call atten- 

 tion to the latter. 



This certainly very remarkable and abnormal structure was the existence, in the septal 

 segment of the tricuspid valve, of an opening the shape and size of an ordinary bean. 

 The said opening, moreover, I found was guarded by a valve similar in every respect to 

 the ventral valve occurring in the auriculo-ventricular orifice of the left ventricle. In 



' In Delphinus tursio, ' Essays and Observations,' vol. ii. p. 107. 



= L. c. p. 65. ^ L. c. p. 412. ■■ L. c. p. 164. 



' Several preparations of the cardiac valves of the Korqual (Physahts antiquorum^ Balanoptera rnvscidiis, 

 dissected by me in 1859, P. Z. S. 1865, p. 213) are preserved in the Hunterian Museum (nos. 927 b to Bc). 

 These have been fully described by my old colleague Dr. Pettigrew, and need no comment on my part. See 

 his " Valves of the Vascular System of Vertebrata," Trans. Roy. Soc. Edinb. 1864 ; and Appendix, R. C. S. E. 

 Museum Report, 1865. 



