492 prof. st.-george mivart on the ^luroidea. [junc 6, 



Myology. 



The muscles of the Felidce have, as every one knows, been most 

 perfectly illustrated and described, with his peculiar nomenclature, 

 by Straus-Diirckheim in his splendid work ' Le Chat.' The mus- 

 cles of the Cat have also been shortly described under their com- 

 monly known names, and partly illustrated from fresh dissections, 

 by me \ The muscles of various Felidce, of the Genet, and of the 

 Hysena have been figured in Cuvier's magnificent ' Recueil des 

 Planches.' The muscles of the Civet have been described by Prof. 

 M.acalister ^ and by Messrs. Toung ^ and Davis ^ and those of Cro- 

 cuta by Dr. Watson ^ 



With these references, I shall content myself with shortly noticing 

 the myological conditions which I have observed in the specimen of 

 Genetta tigrina dissected by me, pointing out their resemblances and 

 differences from those found by me in the Cat, by Prof. MacaHster 

 in the Civet, and by Dr. Watson in Crocuta. 



Muscles of the Pectoral Limb. 



Pectoralis. — I found this in the Genet to be as in the Cat, save that 

 one muscular mass corresponds with what I have described" as the 

 1st, 2nd, and 5th parts of the Cat's pectoralis, while the part which 

 seems to represent the Cat's 2nd portion extends three fourths down 

 the humerus. What corresponds to the 4th part of the Cat's pec- 

 toral is here inserted into the head of the humerus around the ten- 

 don of the biceps, and (mainly) on the greater tuberosity. 



In Crocuta the pectoral is inserted into the whole length of the 

 humerus from the bicipital groove to the elbow, and is divisible into 

 a superficial and a deep stratum. 



The rectus abdominis extends the whole length of the sternum ; 

 and there are (as in the Civet) seven tendinous inscriptions. 



The scaleni are as in the Cat, except that the longer one reaches 

 from the 5th to the 8th rib : from the 3rd to the 6th in the Civet. 

 There are but two scaleni in Crocuta, but there are three in Hycena 

 brunnea and the Civet. 



The subclavius is represented by a small muscle which goes from 

 the first rib to the rudimentary clavicle, as also in the Civet. 



The trapezius has the same general conditions as it has in the 

 Cat L Its anterior part is very small in the Ilysenas ^ 



The cephalo-humeral is as in the Cat, as it is also probably in the 

 Civets and Hysenas. In the latter it is of enormous strength ^ 



1 Journ. of Anat. and Pbys. vol. siv. (1879) p. 166. 



2 Ibid. vol. ii. p. 205. 



* See 'The Cat' (Jolin Murray, 1881), cbap. v. 



4 Proc. Eoy. Irish Acad. n. s. vol. i. 1869-74, p. 606. 



6 P. Z. S. 1879, p. 79, pis. V. & vi. Some myological notes as to Hymna 

 hrunnca have also been published by Dr. Miu-ie in Trans. Zool. Soc. vii. p. 509. 



6 'The Oat,' p. 145. 



■^ Prof. Macalister reckons as part of the trapezius what I and Dr. Watson 

 consider to be the cephalo-humeral (or levator humeri). 



8 " Opposite the last two cervical spines." 



" Trans. Zool. Soc. vol. vii. p. 510. 



