522 MR. F. E. BEDDARD ON THE BRAIN AND [JunC 14, 



delicate tendon (18 mm. long) from the ulnar head of the ^exor 

 profundus ; it splits into three delicate nearly equi-sized tendons of 

 insertion ; of these the two outer are the thickest. 



The Flexor jyro/undus digitorum is composed of four parts : the 

 largest arises from the flexor condyle ; this gives off a branch about 

 15 mm. from its origin, which ends in a thin tendon apparently in- 

 serted into the palmar cartilage ; the main muscle passes into a 

 thick yellowish tendon which immediately joins that formed by the 

 other divisions : the second head of the muscle arises from the 

 middle of the shaft of the ulna ; it becomes tendinous on the lower 

 surface just before joining the others; there is also another smaller 

 condylar head, which is soon joined b\ a head arising from the shaft 

 of the radius ; these divide into four tendons. 



The Extensores carpi radialis brevior and longior are precisely as 

 described by Messrs. Murie and Mivart in the Agouti ; so, too, the 

 Extensor ossis metacarpi pollicis. 



There were no traces that I could discover of the Extensor primi 

 or secundi internodii pollicis. 



The Pronator quadratus is extensive, occupying nearly the whole 

 of the shaft of the arm-bones. 



The Extensor carpi ulnaris arises from the extensor condyle by a 

 strong tendon on one surface and by a few fibres from the ulna ; its 

 strong tendon of insertion, which is 15 mm. long, is rounded. 



The Extensor indicis is a small muscle ; it arises from the middle 

 of the ulna, and then becomes i'used with the extensor mass. 



The Extensor minimi digiti supplies digits IV. and V. 



The Extensor communis digitorum divides early into three 

 muscular bellies : two of these pass into tendons, which supply 

 digits IV. and V. respectively ; the tendon of the third splits into 

 two, which go to digits II. and III. 



The outside of the thigh is covered by a thick muscular mass, 

 composed of several elements which are not to be very easily dis- 

 tinguished ; a tendinous line separates the Biceps from the rest ; the 

 latter mass probably represents the Tensor vagince femoris, the 

 Glutceus maximus, and the Sartorius. It is largely tendinous at its 

 origin from the vertebral spines ; the compound muscle is partly 

 inserted on to the fascia covering the knee-joint ; it is also inserted 

 by a strong tendon on to the lower margin of the femur, just in 

 front of the insertion of the Glutceus medius : I consider that this 

 part of the compound muscle is undoubtedly the Glutceus maximus. 



The Biceps is an enormous fleshy mass ; it has the usual double 

 origin and is inserted along the whole of the leg chiefly to the fascia 

 covering the leg, but also in front by a short tendon to the patella. 



The Gracilis is a double muscle ; the two parts rim side by side, 

 arising from the symphysis pubis close together ; they are also 

 inserted close together on to the fascia covering the leg. 



The Semimembranosus is composed of two distinct parts : the first 

 part has a strong tendinous attachment to the inner condyle of the 

 femur ; the second part is a long thin muscle from the caudal 

 vertebree and is inserted just between the two heads of the 



