dition. The right hand is on the whole better shaped than the left, 

 as the drawings indicate. 



On making a section through the right forearm and hand, at 

 a plane parallel to the dorsal and palmar surfaces the following 

 points were noticed. There is no trace of the radius and the lower 

 extremity of the ulna (u) is curved so that it and especially its carti- 

 laginous lower epiphysis bend round a large part of the carpus (Fig. 2). 



The carpus consists of two rows, the first of which possesses two 

 cartilaginous nodules, the second three. The former are an ovoidal 

 luuare (Z), bying in the concavity of the bent ulna, and an irregularly 

 quadrilateral cuneiform (cu). The second row has an unciform (un) 

 carrying 4 and 5 metacarpal bones, a magnum (m) carrying 3, and a 

 trapezoid (t) for 2. There is no trace of any representatives of sca- 

 phoid or of trapezium. The muscles on the radial side of the arm are 

 much shortened. The condition of afiaii-s on the left side is very si- 

 milar to that on the right. The chief differences are as follows. 

 (1) The ulna is straight and not curved. (2) The carpal bones of the 

 first row are smaller than those of the left. (3) On the radial side 

 of the ulna and between its lower epiphysial cartilage and the carti- 

 lage of the lunare there is a fibrous or fibro-cartilaginous strip. Be- 

 tween this and the ulna and between the former and the lunare there 

 are distinct articular cavities, which leads me to think that it muse 

 represent the displaced triangular fibro-cartilage of the inferior radio- 

 ulnar articulation. A somewhat similar case to this is described in 

 the Middlesex Hospital Catalogue (No. 724). Besides other abnorma- 

 lities this subject (an adult female) has the following pecuharities in 

 the left arm. „The radius is wanting, the ulna is shortened and cur- 

 ved, with the concavity looking upwards; the elbowjoint cannot be 

 extended beyond a right angle. The lower end of the ulna articu- 

 lates with the largest of the three bones which alone form the carpus. 

 The thumb is absent." It is also noted that the bones of the right 

 thumb are small. This case differs from mine in the less perfect de- 

 velopment of the carpus. In both the hands of my specimen the car- 

 tilages of the second row were fair sized and much better developed 

 than those of the first row. The unilaterality and the absence (appa- 

 rently) of dislocation of the wirst in the case first quoted also differ 

 from' the condition obtaining in mine. In the Royal College of Sur- 

 geons London, Museum (Teratological Catalogue No. 327) there are 

 the hands of a full-term foetus in which on the leftside the thumb 

 is represented by an imperfect terminal point only, which adheres to 

 the hand by a narrow pedicle of integument. In the right hand the 



