COMPAKVm'E STUDY OF S(X)MBKf)n) FLSHES. 435 



very nan'ow iind tlie flesh very ricli iu aiuuuut. Tlirte IoIkjs of tbo livor are 

 cuuuec-tefl with each otlier bj- von- iiaiTow |X)rtiuus, aud the lateral lobes are 

 divided intj luauv lobiiles at the margin, as well as at the inner side. On 

 the outer side of the liver we fiud vei-y fine jj.-iraUol venules, coveriufi; nearly 

 the whole surtice of the livir. On the inner side of tl;e hver bulbous and 

 more or less conical lua&ses of vjisculur plexus oF both ai1x;rioles and venules 

 are found. 



Venules to the cutaneous vein are aiTanged in two alternata rows, and 

 ai-e more numerous than the arterioles. These venules pour to the inner side 

 of the vein. Arterioles from the cutaneous aiieiy are arranged m one row, 

 and on the inner side of the artery (fig. 20). Venules are very niiuute and 

 nnmerous, forming tliick sheets iu the Literal muscle, befoiv pouring into the 

 cutjiueous veiu. These venules form numerous small bimdles by uniting just 

 at the i-oot. Eai'h of the mniierous bmnches from the cutaneous artery is 

 minutel}-, divided as soon as it emerges fi'om tli(> main blood-vessels, and 

 nmning along the venules supphes fi-esh blood to the dark red portion of the 

 lateral muscle. The cufciueous aitery originates just behind the pharyngeid 

 muscle iu the levels of the fifth vertebra and runs obliquely backwiird. 



Air-bladder present, rounded at the anterior end, and its wall is mtlier 

 thiu. It is luimiw, but long, nmning the whole length of the abdominal 

 cavitv". Kidneys of both sides are unitad to form a flat, ring-shaped body 

 round the pharyngeal muscles. The ring-sliaped kidneys ai'e slightly prolonged 

 backward. Ureteis of both sides meet in a neai'ly straight line, thick at the 

 junction. In tliLs thick junction, we find a short longitudinal septum from the 

 anteriiir wall. Pcsterior to tliis septimi the uretei's are joined to a median 

 tube. 



Skull rather uanow. Vertebral column more or less slender. Height of 

 the vertebrae neai'ly uniform. Parapophyses well develojied. Parajxjphyses of 

 the ninth veitebra are almost horizontal sis in the preceding vertebrae ; but in 

 the tenth vertebra the haemal arch is formed and is tm-ned forward leaving 

 onl-s' a little space between the centnim and the arch. In each of the following 

 precaudal vertebrae the liaemal spine is formed, and it is remai'kable that it 

 is nearly uniformly elongate<l. These precaudal liaemal spines are remarkal)ly 

 longer tlian in other tunnies. The head of the second and tlüi'd ribs is very 



