36 MKSSRS. WATSON AND YOUNG ON THK [Jail. 1-1, 



twoparts — a smaller, lying to the left, and a larger irregularly quadri- 

 lateral mass, which lies to the right of the gall-bladder. The right 

 hepatic segment, moreover, presents well-marked Spigelian and 

 caudate lobes. These are quite continuous with each other, and 

 extend along the posterior margin of the transverse or portal fissure. 



The gall-bladder, situated on the right central lobe, is of large 

 size and regularly pyriform. The cystic duct is !| inch in length, 

 and unites with the left hepatic duct, which, after a farther course 

 of half an inch receives the right hepatic duct. The common bile- 

 duct, formed as described, enters the duodenum along with the duct 

 of the pancreas. 



In respect of the liver, H. croeuta agrees closely with //. striata 

 and H.brunnea, differing from the former, however, in the absence of 

 the sharp curvature of the neck of the gall-bladder described by 

 Daubenton', and referred to by MeckeF. The resembance of thia 

 viscus to that of Proteles is no less striking, the only difference 

 between them consisting in the more complete separation of the 

 lobes in H. croeuta than in Proteles. 



Pancreas. — Measures one foot in length, and has an average 

 breadth of one inch. It occupies the usual position. 



Spleen. — Elongated and tongue-shaped, measures 46 inches in 

 length ; its borders are very irregular, but without distinct fis- 

 sures. Its widest portion is 3, and its narrowest 1 inch in breadth. 

 These measurements correspond closely with those of the organ in 

 other species oi Hycena. The viscus differs from that of Proteles^ 

 only in its larger size and in the absence of any oblique fissure on 

 its outer surface. 



Jjarynx and Hespiratory Organs. 



Larynx. — The superior aperture of the larynx is guarded by an 

 epiglottis of large size; its posterior surface is deeply concave, and 

 its apex uniformly rounded. In respect of its form this structure 

 resembles much more closely that of the Felidae than of the Canidae, 

 ill the latter of which it is distinctly triangular and almost flat. The 

 thyroid cartilage is wide, and, as observed by Prof. Flower in Proteles, 

 destitute of a fissure on its lower margin. It differs from the thyroid 

 cartilage in both Felidae and Canidae in the much greater projection 

 of its anterior tubercle. The cricoid cartilage is of the same general 

 form as in Proteles, differing from the latter, however, inasmuch as 

 its upper border posteriorly is not prolonged into a median pointed 

 spine. In consequence of this the arytsenoid cartilages extend beyond 

 the highest point of the cricoid, and are not situated below the level 

 of its posterior median s})ine as is the case in Proteles. The false 

 vocal cords (which, according to Mayer'', are absent in H. striata) 

 are rounded and soft, and are placed very obliquely between the 

 arytsenoid and thyroid cartilages, their anterior extremities being 



^ Loc. cit. 2 Op. oii. vol. viii. p. 720. 



' Prof. Flowpr, loo. cif. 



■* " X7eher deii liaii des Organes tier Stimme," Nova Act.'v ApjuI. Xaturae- 

 Curios. vol. xsiii 18.t1, ]) 6it4. 



