6 MR. J. H. STEEL ON INDIVIDUAL [Jail. 



bands beueath the arches of the ribs run from one rib to another, 

 crossing two or three ; these subeostales vary in number, are some- 

 times continuous posteriorly with the psoae, and are covered by the 

 pleuro-costalis, 



Transversalis abdominis varies in the degree of extension of its 

 tendon towards the internal abdominal ring. The rectus abdominis 

 has a variable number of transverse tendinous markings. 



Limbs. 



Hind. — Sartorius superiorly is attached to the tendon of psoas 

 parvus, to the os innominatum with psoas parvus, or only to the 

 lumbar fascia, sometimes to two or even three of these points. 



Flexor pedis j)erforans sometimes presents a distinct muscular belly 

 and tendon, probably a representative of the flexor longus hallucis 

 found in man. 



Variations of pedal muscles less marked than in fore limb. 



Fore. — Scapulohumer alls posticus sometimes almost obsolete. 



Teres externus sometimes divisible into teres proper and acromio- 

 humeralis, as in Ox. 



Flexor brachii. — Superior tendon has a remarkable piece of red 

 muscular structure on its anterior part, which varies considerably in 

 size. Also the band which runs from this muscle to extensor me- 

 tacarpi magnus may often be separated nearly to the knee ; careful 

 dissection shows that the inferier extremity of this muscle is some- 

 what divided into two parts similar to those seen in Dog &c. 



Pronator teres is of frequent occurrence inside the elbow-joint, 

 arising from the internal inferior prominence of humerus, inserted 

 just below internal lateral ligament, crosses radial artery, vein, and 

 nerve. Generally this muscle is represented only !)y a small wliite 

 fibrous band. 



Extensor pedis. — Thiernesse's and Phillip's muscles sometimes 

 distinct, often imperceptible. 



Lumbrici vary in number and size. The interossei of the large 

 metacarpal, which in the Equidai form the superior sesamoideal liga- 

 ment, vary in their amount of muscular structure and in their bulk. 



Neurology. 



Nerves remarkably uuifurm; sometimes the transverse metacarpal 

 branch is not immediately subcutaneous, but separated from the skin 

 by a longitudinal band of fibrous tissue. 



Splanchnology. 



Sometimes a third rudimentary circumvallate papilla a little behind 

 the two usually present. Position of parotid opening varies to a 

 slight degree. 



Teeth. — Incisors : sometimes only four present in each series, 

 corner permanent incisors having never appeared. Occasionally the 

 upper incisor series has quite become lost — either a result of wear or 

 fracture. The superficial resemblances of this condition to that 

 which occurs in the Ox is, of course, of no morphological value. 



