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Show 496 PROF. ST.-GEORGE MIVART ON THE ALUROIDEA. [June 6, tendinosus. In the Hyana it descends at least to the middle of the leg1; Dr. Watson says to the os calcis in Crocuta. The semitendinosus of the Genet (as also the Civet) has a delicate head, which arises from the third caudal vertebra at the hinder end of the caudal origin of the gluteus maximus, with which it is conterminous. This head joins the other part of the semitendinosus about one third down the femur, and becomes slightly connected with the tenuissimus. It is inserted as in the Cat, but the upper tendon of its insertion is not so distinct. This muscle has no caudal origin in Crocuta. The semimembranosus is in the Genet quite as in the Cat, save that its two parts are more separate-separate for nearly the whole length of the muscle. The part from the ramus of the ischium goes to the femur ; that from its tuberosity to the tibia. In Crocuta it is quite inseparable from the adductor magnus. Agitator cauda.-This muscle, which I did not observe in the Cat, arises in the Civet from the first and second caudal vertebrae, and is inserted into the back of the femur. In the Genet its origin blends with the hinder end of the caudal origin of the gluteus maximus. It is crossed by the sciatic nerve and goes to the lower third of the femur (rather behind its outer margin), and extends down almost to the external condyle. In the Genet and Civet there is a special sphincter of the scent-glands. The sartorius is double in the Genet and, sometimes at least, in the Civet2. One part arises from above and behind the anterior superior spine of the ilium and goes to the patella ; the other part springs from below the first part, and is lost in the fascia on the inner side of the knee. It is also double in Crocuta. The pectineus in the Genet is as in the Cat. It is large and double at its insertion in the Civet3. In Crocuta it goes from the ilio-pectineal line to the middle of the linea aspera. The adductor mass of the Genet is substantially similar to that of the Cat, though, as in the Civet, it may be divided into three parts. One of these, the adductor primus, is attached to the semimembranosus 4. Another, the adductor secundus, is very wide and short and is separable into two layers. The third part, or adductor longus, is attached halfway down the femur. In Crocuta there are two adductor muscles, which both arise from the pubic arch, and which are inserted, respectively, one into the internal condyle and internal tuberosity of femur, and the other into the whole length of the linea aspera and into the internal branch of its lower bifurcation. The quadriceps extensor of the Genet is as in the Cat, save that the crureus takes origin along the whole length of the femur, up to the neck of that bone. The crureus is not differentiated in Crocuta, and the vasti are hardly separable. 1 Cuvier's 'Planches,' pl. 131. 2 Mr. Young, I. c. p. 174, describes it as single. 3 P. Z. S. 1879, p. 102. 4 Not so in the Civet (Young, I. c. p. 174). |
