"' 10 MR. J. C. GALTON ON DASYPUS SEXCINCTUS. 



This muscle, the epitrochleo-cmconeus, has had a monograph, consisting of several 

 pa^es, and illustrated by three plates, devoted to it by Professor Wenzel Gruber 1 . The 

 first plate, consisting of five figures, is devoted to the varieties of this muscle as seen in 

 the human subject, in which it is by no means uncommon 2 . In one of these figures 

 (fig. 5) it is represented as being made up of two distinct delicate slips, each constricted 

 in the middle and "bellying out towards origin and insertion. This differentiation of the 

 muscle is not figured as occurring in any of the animals whose elbow-regions form the 

 subjects of Prof. Gruber's plates; nor have I succeeded in finding such in the beasts 

 which I have had the opportunity of examining. 



Prof. Gruber describes the epitrochleo-cmconeus among the Bmta, in the following 

 members of the order -.—Bradypus tridactylus, Dasypus tricinctus, Myrmecophaga didac- 

 tyla, and a Mania, species unknown 3 ; but figures that muscle only which belongs to the 

 three-banded Armadillo 4 . 



To Prof. Grate's already copious list I am able to add the names of the following 



animals in which I have dissected out and made drawings of this muscle :— M. tcwiandua 

 and UMwpm didactylm among Bmta 5 , Echidna setosa among Monotremata 6 , Phaeco- 

 tmy» wombata among Marsupials, and Bystrix [erutata ?) among Rodents. In all cases 

 the muscle had the relation to the ulnar nerve described by Prof. Gruber. 

 Pronator <W-Is a triangular, very well developed muscle, fleshy and subcylindrical 



M u.s origin, from which it gradually flattens out into a ribband-like expansion, and is 

 nserted by a bl ^ ad tendon ^ ^ ^ ^ rf ^ ^.^ ^ ^^ ^ ^ 



U>, mncr condyle of the humerus, and has an origin common with, but superior to, that 

 ot the flexor carpi radialh. 



No portion of the muscle arose from the coronoid process of the ulna '. 

 Supinator /cm^.-Appears to be absent. 



JS^J^r^ a Sm °° th SUlfaCe 0utside a •h.'PJy prominent tubercle, 



We v tW ? T ^ ° f the hUmerUS ' arises a delicate fc*form muscular slip, 



barclj three-quarters of an inch in length, which is inserted into the longitudinal ridee 



1 « 



Petersbourg 



(mit 3 Tafeln), M 



this muscle as occurring i„ 7C , J 1867 ' ^ J ° hn W °° d describes <P- 521 ) and % ure8 <** ^ 



Wood mentions, moreover tW T * ™T f^' *** ^^ for '" the name Anconeus epitrochl earls" Mr. 



■■-« hlea and the ohm, non » P™f r v « somewhat ian-shaped muscle, connecting tne 



1 Op. tit pp. 10 and 20 " ^™ 8UCh " mU8Cle in the Hare (^ s ***■)* °P- *■ tab ' » ** 2 ' 



5 ^ may not be amiss "here to state that T h \^ * ** ^ %> 3> 



specimen of T«^« nom*-****, ,j> JT \T ^ mUSde VGI7 WeU develo Ped proportionally in a young 

 the root of the tail, and which wV ^7'™ meaSUred but five in <*es and a half from the tip of the snout to 



Mr. Mivart de^beT but C . UmblllCal COrd stiU adb -*rent. 



his description of the mmoh h I T ^^ ™™ e ' this muscle as P re8ent ** ^&«*»a *yf*** At the conclusion of 

 . ' " Kegarding the compare ^^^!°™ * f ^.^ *» ^ -*" * * * 388- 



lower animals 



» coronoid slip, rt will be found very 

 any of the Rodents whiVl, T w„ „„. 



nature." 



any 



* "»i me natur. 



Ihy 8 .2ndser.(Cambr.l867)vol.i.p.9. 



peculiarly human ] 

 m" Jmirn. of Anat 



» 



