DE. J. MUEIE ON THE OEGANIZATION OF THE CAAINa WHALE. 265 



differentiate in B. rostrata as superficial hyo-keratic, deep hyo-keratic, and kerato- 

 pharyngeus'. 



Under the title of occipito-thyroideus, Stannius^ has called attention to a partially 

 separate slip of muscle adjoining the preceding. He says that in the Porpoise it arises 

 along and from the sharp borders of the exoccipital, and is inserted on the side of the 

 thyroid cartilage and angle towards the epiglottis. In Gloliceps there is a muscle 

 corresponding to this, but partially with a thyrohyal attachment. Macalister^ desig- 

 nates it basio-thyro-hyoid, and believes it to be an expanded representative of the 

 cephalo-pharyngeus of Theile. 



2. Tracheo-pidmonary parts. — The short trachea bifurcates into short, right and left 

 bronchi, about the top of the upper third of the pulmonary organs; and there is a 

 tertiary bronchus to the right. In this respect Globiceps agrees with such Cetacea as 

 have been dissected, save Balcena mysticetus. 



The lungs, when taken out of the chest, were collapsed, and contained apparently but 

 a very small amount of residual air. This gave them the reverse of a crepitant character, 

 viz. a lax spongy kind of texture under pressm-e. Moreover their pleural covering is 

 such a strong, tough, fibrous envelope, that they acquire marginally an almost leathery 

 consistence. Having inflated the lungs, on their removal en masse with the heart 

 (reproduced in the sketch, fig. 49), their shape and another most remarkable peculiarity 

 were fully disclosed. Each lung is elongate and, strictly speaking, unilobed. But there 

 is a small anterior or apical emargination or wide shallow cleft v^hich tends to mark 

 off an isthmus or indefinite tongue-shaped corner. This lobule, if one may so term it, 

 passes sternally inwards, towards its fellow of the opposite side, at the root of the heart. 

 The area enclosing the heart, great vessels at its root, and the pericardium, is neces- 

 sarily large ; but the basal surface of the lungs, or that fitting upon the diaphragm, is 

 likewise relatively enormous. This diaphragmatic superficies is dome-shaped, and 

 doubtless is chiefly intended to receive the capacious compound stomach when dis- 

 tended. At the superficial diaphragmatic end the two lungs are connected by a bridge 

 of pleural membrane, which is also fastened to the diaphragm. I ascertained the length 

 of the lungs to be, right 23, and the left 25 inches. 



In the Chinese Globiceps it is stated " the lungs have two lobes on each side — the two 

 central lobes are broad, flat, and thin, but as long as the lateral lobes, and both are well 

 supplied with bronchia"''. A thoroughly cleft and compound lung is certainly an 

 unusual condition in Cetacea; but I conjecture from Dr. Williams's allusion to the 

 longitudinal nature of the lobes, that he but means the long, thinner, free approximate 

 margins partially covering the heart &c. 



The most interesting feature connected with the pulmonary parts of the Caaing 

 Whale is the presence of a pair, or more, of large lymphatic glands most prominently 



' Loc. at. p. 23-5, and pi. 6. flgs. 3 h, 18, and/. ' Loc. cit. p. 9. 



» Papers cited. * Eepository already cited, p. 412. 



