1879.] ANATOMY OF UY.ENA CROCUTA. 51 



been figured, and in view of the probable wants of snbsequenf inves- 

 tigators, we have thought it right to add the accompanying drawings. 

 An examination of these, and comparison of them with ProY. Flower's 

 figures of the brain of Proteles, will show that, except in respect of 

 tize, and the absence of a distinct fissure in that convolution which 

 bounds the Sylvian fissure posteriorly, the description and compara- 

 tive remarks of that anatomist apply equally to the brain of H. cro- 

 cuta and to that of Proteles. The hemispheres of the brain mea- 

 sured each 3| inches in length; and the greatest breadth of the two 

 together was 2|- inches. 



Myology'. 



To avoid the necessity of constant references in makino- compa- 

 risons of the muscles of the Spotted Hyaena, we wish it To be un- 

 derstood that, unless otherwise stated," the observations regarding 

 H. striata and Cat have their source in Meckel's ' Anatomie Com- 

 pare'e,' those relating to the Dog in Douglas's ' Myographise 

 Comparatse,' whilst the notes respecting H. brunnea are derived 

 from Dr. Murie's paper previously quoted, and those in connexion 

 with the Civet from a paper by Macalister' and partly from our own 

 dissections. 



Muscles of the Head and Neck. 



The platysma imjoides consists of a strong broad sheet of mus- 

 cular fibres, extending from the anterior half of the neck, covering 

 the masseter and part of the mandible, and blending in front with 

 the deeper muscles in the neighbourhood of the mouth. 



Inasmuch as the region of the face was unfortunately somewhat 

 damaged prior to our dissection, we are unable to give so accurate an 

 account of its muscles as we would wish. They appeared however, 

 to be strongly developed, and to consist of the following :—orbtcu- 

 lansoris, the external fibres of which take an attachment to the 

 margin of the lateral nasal cartilage; orbicularis palpebrarum, 

 which surrounds the eye, and has a bony attachment to the superior 

 maxillary bone. 



A zijgomaticus runs from the temporal fascia in front of the ear 

 to the angle of the month. There is also a strong levator labii 

 supenons et alte nasi and a smaller levator anguli oris. Buccinator 

 IS thir 



iin. 



An occipito-frontalis is attached posteriorly to the temporal fascia 

 in front of the ear, whilst anteriorly its fibres blend with those of the 

 orbicularis palpebrarum. 



Temporal.— 'l'h.\s muscle, which possesses the ordinary attach- 

 ments, is almost characteristic of the genus by reason of its great 

 magnitude. In H. brunnea Murie speaks of it as enormous even 

 for a Carnivore. As in H. striata and H. brunnea, so here the 

 superficial fibres are with difficulty separable from the masseter. 



' See Plates V. and VI 



' "The Muspular Anatomy of the Civet aud Taym,- Proc. Eov. Irish Acad 

 vol. 1. ser. z, p. oOo. 



