1867.] MYOLOGY OF IGUANA TUBERCULATA. 785 



alsfnrmfr 'TT'-" ^^^•}^' ^^ ^•)- ^^^^her muscle, which I 

 tZTeZZflA'Tr'l''^^ ''''''''"''' ^"^^^ ^'•«'" the internal 

 acces^oriuT T^ ^ r' ^"^^ T''""^^' superficial to the pronator 



tSroxim;i hJT^I'^' f '' '^'''''"^'' ^''^ ^« '»«^«-ted into about 

 me proximal half of the ulnar margin of the ulna. 



and berolT'"'' ^^"^^'•"'"^ (%«; 1 1 & 12, P. Q.) is broadest below, 

 and becomes very narrow towards its upper end. It arises from the 

 'r^in of That 1''^ distal half of the uffa and from the whdeTad'a 



ffexor carpi ulnaris (figs. 1, 6 & 9, F. U., and fig. 12, F. C. U) 



nerve Zin' bT ""'':'^"i ^^ff^' ^■^"'=^^' ^' "^^^ ^^^ ^he ulnar 

 condyle and ^tbnfr'" .f t"''^' origin-that from the internal 

 pSforme n i\L V^'' olecranon. It is inserted into both the 

 re dveron i \'"''''!''P"H "'• ^''^'^ observes*. This muscle 

 carS ulnTrif .r' ''""f ''T^ '"^' '^'' "'^^'-^^^^ °f the extensor 

 ™srm,ni;] ,^' -r^'^l' ^r-^^^S a layer of muscle which 

 wraps round the ulnar side of the forearm. 



entirely confined to the haudf. It arises from the annular li-ament 



rated'in'f!:^ "'V'" ''T'^ P'^^^^"S- '' the digits, beinf^S 

 rated m each case by a tendon of the flexor profundus digitomm. 

 i'lexor profundus digitorum (figs. 6 & 12, F.P.BX This is a 

 ?h.i'^T"'f '-'"^i^^^ ^"•^'•' ™°°^ ^'^ 1«^« distinct heads of oridn! 



the ori^i'n of Tb.'T'' °°' ^^^^ '"r^'i""^ •^""'^^^^' immediately bene°ath 

 tne origin of the flexor carpi radialis ; it very soon unites with the 

 portion arising from the ulna (fig. 6 F p jj i) 



thJfirstT"? ^'f^^^"''■ 'P""f ^'■""^ the internal'condyle, just below 

 FPD. 2) ' ''"'''' ' P"'^'"'' '"'^"S from the ulna (fig. 6, 



suit ofthe'nlna" '''" "^^"^^ '^^" *^" S"^*^"- P^^^ ^^ the flexor 



rin^whicblr' P°r''''' """^f f "'^ give rise to a very strong tendon 

 (in which ,s a palmar ossicle); and into the deep surface of this 

 tendon are inserted muscular fibres, which spring from the carnus 

 and constitute the fourth head of the muscle ^ 



From the distal margin of this tendon proceed the five perforating 

 tendons, one going to each digit. pcnoiaung 



Lumdricales 1 have only observed six lumbrical muscles :_ 

 sid?'Sr?econ7di'it "'"'• '''' '' ''-' ''''^ ^^'^^-^ ^« the ulnar 



J:^i^^s^^i:{^^ S^ '-^'' ^- - -^' ^■^'^^' - 



seiS^^n^s^d^tTthJ t^rtS^^^^' ^- - -^ ^^^^)' ^"- 



si^^^iTsJi;;: SgS "'^ ^'^'^ '^^ ^^^^^' ^°-^^^ -^« the radial 

 Interossei. There are dorsal interossei which arise from the car- 

 pus, and are inserted one on each side of the proximal phalanx of 

 * ^°'- «''• P- ■^^''^- t Meckel, !oc. cit. p. 392. 



