388 



Mr. J. Wood Varieties in Human Myology. [June 15, 



Fig. 5. 



the more remarkable may now be briefly de- 

 scribed. 



In a female was found, on both sides, an in- 

 creased development of a common irregularity, 

 viz. a broad muscular slip from the tendon of the 

 latissimus dorsi, passing across the axillary 

 vessels and nerves to be inserted with the deeper 

 or sternal fibres of the pectoralis major. This 

 slip was separated from the rest of the latissimus 

 by a well-marked tendinous intersection, and was 

 connected with the ninth rib. In a male subject, 

 which presented an abnormal subclavian slip of 

 muscle closely resembling that in fig. 4, were 

 found upon the larynx two small but curious 

 muscular slips arising from the lower border of the 

 thyroid cartilage on the left side, between the 

 crico-thyroid and thyro-hyoid muscles, and pass- 

 ing obliquely across the median line, in front of 

 the thyroid isthmus, to be inserted into the front of 

 the fifth, ring of the trachea, near to and parallel 

 with each other. They seemed to be prolonga- 

 tions of the superficial fibres of the crico-thyroi- 

 deus, with the tendency to cross the median line 

 more commonly shown by the hyoid and laryngeal muscles than else- 

 where. 



In a male pharynx, the middle constrictor showed an irregularity. A 

 few of the upper fibres, on both sides, arose from the vaginal process of 

 the temporal bone, and, curving inwards and upwards, were inserted with 

 the rest of the upper fibres of the constrictor into the pharyngeal ridge 

 and median raphe. This[arrangement is somewhat different from that of the 

 salpinyo-pharyngeus described by Cruveilhier and not unfrequently found 

 in this situation. 



In both arms of a muscular male was found a small slip of tendon giving 

 off a fourth head to the biceps, and springing from the lesser tuberosity 

 of the humerus at the insertion of the capsule and tendon of the sub- 

 scapularis. This is a bicipital head of the same character as the fourth 

 head described by Meckel as arising sometimes from the greater tubero- 

 sity at the edge of the bicipital groove. The third head in the present 

 case arose in the usual situation, from the upper fibres of the brachialis 

 anticus. 



In a feebly developed male left arm was found a curious offset from the 

 flexor pollicis longus. On its inner side, arising partly in common with 

 this muscle, was a penniform muscle of good size, ending in a long and 

 strong tendon which, after passing under the annular ligament, became 

 continuous with the outer of the two heads of a double first lumbricalis 



