ELEVENTH KEPORT OX KECENT TERATOLOGIC AL LITERATURE. 507 



Ca^ntatum secundarium, the disto-dorso-ulnar angle of the os mag- 

 num : hes dorsal between the os magnum, unciform, metacarpal iii. 

 and metacarpal iv. 31, Ossiculum Gritberi, volar: between os mag- 

 num, unciform, metacarpal iii. and metacarpal iv. 32, Os hamuli 2)ro- 

 prium, the hook of the unciform. 33, Vesalianum, intruding itself 

 from the ulnar aspect of the hand between unciform and metacarpal 

 V. F. Metacahfal row : 34-38, Metacarpals i.-v. G. Meta- 

 CARFO-PHALANGEAL ROW : 39-48, Sesama i.-v. radialia et tdnaria, 

 volar : on the heads of the metacarpals : on each member is a radial 

 and an ulnar sesamoid : S. iii. ulnare and S. iv. radiale have not as 

 yet been observed in the adult. 49-53, Sesama i.-v. dorsalia. 

 Dorsal : on the heads of the metacarpals. Up to now in man only 

 S. i. dorsal has been observed. H. Basi-fhalangeal row : 54-58, 

 Proximal plialanges i.-v. I. Proximal interfhalangeal row: 

 59-63, Sesama i.-v. proximalia, volar : between these and the next 

 phalanges. S. i. proximale was formerly incorrectly described by the 

 author as S. i. distale. Sesama ii.-v. proximalia are in man chiefly 

 represented by fibrous sesamoids. K. Mesophalangeal row: 64- 

 68, Middle phalanges i.-v. ; mesophalanx i, is assimilated to telo- 

 phalanx i. L. Distal interfhalangeal row: 69-73, Sesamal i.-v. 

 iJisfalia, volar : between middle and terminal phalanges. Up to the 

 present only S. ii. had been observed. M. Telophalangeal row : 

 74-78, terminal phalanges i.-v. Pfitzner (Ixii.) also records u 

 number of malfurmations of the extremities, as follows : — (1) A family 

 with hereditary syndactyly, Polydactyly, and other malformations of 

 the fingers. These run through three generations including twenty- 

 seven individuals, all of whom, however, were not affected. Syndac- 

 tyly or webbing was met with — 



In the hand — 



Pollex and index, . two cases in four hands. 



Annularis and minimis, ,, ,. 



All digits, . . . one case ,, two ,, 

 In the foot — 



1, 2, 3, . . . thirteen cases in twenty-six feet. 



AH, .... one case in two feet. 



Supernumerary pollux met with in three cases in four hands. 



,, minimus ,, six ,, twelve ,, 



„ hallux ,, six ., eleven feet. 



(2) Synostosis of the terminal phalanges of me 2, 3, 4 toes in the left 

 foot of a man. (3) Duplicity of the phalanges of the little toe, also in 

 the left foot of a man. (4) Duplicity of the hallux in a girl; the 

 ungual phalanx was perfectly double, the first phalanx was broadened 

 and shortened, presenting somewhat the appearance of a double 

 phalanx. There was also a double internal cuneiform bone in this 

 case, but this abnormality was unconnected with the other. (5) A 

 family, Avhose tree is given, with hereditary Polydactyly of the littU; 

 finger and little toe. Clivio (Ixiii.) gives the case of a child born with- 

 out any right loiver extremity. The right ischium was absent, and the 



