1882.] ANATOMY OF PROTELES. 581 



The sterno-hyoid muscles differ from those of Hycena inasmuch 

 as they are inseparably united so as to form a single muscular band 

 from their origin to their insertion. Proteles differs in a corre- 

 sponding manner from Viverra, in which the two muscles are quite 

 distinct. 



The omo-hyoid is absent in Proteles as in Hycena. In the latter 

 genus Meckel' affirms its presence in H. striata; but in H. crocuta 

 it is certainly absent. 



The stylo-glossus of Proteles agrees with that of Hycena, but 

 differs from that of Viverra inasmuch as it is attached to the 

 base of the stylo-hyal bone. In Viverra it is attached to the middle 

 in length of that bone. 



In Proteles the stylo-hyoid is absent, as in Hyeena crocuta and in 

 Viverra. In H. striata Meckel affirms its presence. 



The scaleni are arranged much as in H. crocuta. As in that 

 species the scalenus anticus is absent. The scaleni medius and 

 posticus in Proteles are more closely united than in H. crocuta, and 

 form a single mass of fibres arising from the 4th, .Tth, 6th, and 7th 

 cervical vertebrae, and inserted into the four anterior ribs. A very 

 slight separation exists between the fibres which are inserted into 

 the first rib and the rest of the muscle. In Viverra there are three 

 perfectly distinct scalene muscles. 



The splenius of Proteles exactly resembles that of H. crocuta. 

 It differs from that of Viverra inasmuch as no part of its fibres is 

 inserted into the cervical vertebrae. Thus in Proteles, as in H. cro- 

 cuta, the splenius colli is absent. In Proteles, as in H. crocuta, the 

 complexus is not divisible into a complexus proper and digastric. 

 In this respect the two species named differ from H. striata. 



Muscles of the Back, Thorax, and Abdomen. 



The trapezius of Proteles resembles that of H. crocuta. In both 

 these species it is relatively of much smaller size than in Viverra. 



The latissimus clorsi in H. crocuta arises from the posterior eleven 

 dorsal spines, and has no costal origin. Similarly in Proteles the 

 costal origin is wanting, and the spinous origin is limited to the 

 posterior eight dorsal spines. A strong dorsi epitrochlearis exists 

 in Proteles, as in H. crocuta. The insertion of the muscle into the 

 humerus is rather higher in Proteles than in Hycena. 



The rhomboideus in Proteles, as in H. crocuta, is single. In the 

 former it arises from the last four cervical and two anterior dorsal 

 spines, and is therefore relatively larger than in H. crocuta. Meckel 

 states that in H. striata this muscle possesses an occipital origin. 

 Proteles in this respect differs from H. striata and agrees with H. 

 crocuta. 



The serrati postici in Proteles are not continuous with one 

 another as they are in H. brunnea and Viverra. In this respect 

 Proteles agrees with H. crocuta. The serratus magnus of Proteles 

 resembles that of H. crocuta, but takes an additional attachment to 

 the first rib. In this respect Proteles differs from Viverra. 



' Anatomie comparee. 



