

602 MR. J. C. GALTON ON THE MYOLOGY OF 



name of adductor minimi digiti, took origin from the plantar ligament, at about the point 

 of contact of the bases of the metatarsals of the third and fourth digits. After passing 

 obliquely across to the tibial side of the fifth digit, it joined the lower layer of the 

 extensor tendon on the dorsum of the proximal phalanx of this digit. 



Plantar muscles of hallux.— A. thin fusiform slip, taking origin from the anterior 

 extremity of the ento-cuneiform bone, on its plantar aspect, and being inserted into the 

 sesamoid at the fibular side of the base of the proximal phalanx of the hallux, in company 

 with the terminal portion of the muscle termed by Prof. Humphry adductor Jiallucis. 



This latter muscle, which may represent the outer (fibular) head of the flexor brevis, 

 took origin from the strong plantar ligament, at the level of the base of the metatarsal 

 of the second digit (the " middle metatarsal," according to Prof. Humphry). 



The first- described muscle bears a sreat resemblance, both in origin and insertion, to 



one which I found last year in the right foot of a seaman at the " Dreadnought " Hospital 

 Ship, and which is considered by Mr. Wood to be the plantar representative of the 



" interosseus palmar is volaris " of the hand l . 



Since, however, this muscle does not coexist with a complete set of the normal muscles 

 of the hallux, a certain conclusion can scarcely be arrived at that it is the homologue of 

 the above-described human " abnormalitv," seeing that either the adductor Jiallucis or 

 the fibular head of the flexor brevis of this digit may lay just claim to it as a displaced 

 representative. 



As in the specimen described by Prof. Humphry, no proper abductor Jiallucis appeared 

 to be present. 



Lumbricales. — These muscles are four in number. They have origins similar to those 

 of their homologues in Dasypus, arising in the interspaces of the tendons of the flexor 

 longus, where these branch off from the common tendinous expansion of the muscle. 

 They differ, however, in continuing single to their insertion, which is into the middle of 

 the tibial side of the proximal phalanges of the second, third, fourth, and fifth digits. 

 The hallux, it will be seen, unlike its homologue in Dasypus, has no lumbricalis. 



These muscles resemble their homotypes in the upper limb in not being connected with 

 the sheaths of the extensor tendons. 



Cuvier gives a very good representation of them in one of his plates 2 . 



The A'i, according to Meckel 3 , has no lumbricales, although the flexor longus is well 

 developed. 



Eapp mentions these muscles as present in M. tamandua\ but makes no statement 

 relative to their number or mode of termination. 



The Interossei proper are confined to the three middle digits. They are six in number, 

 and are so divided that each digit has one on either side. 



1 Proc. Royal Soc. May 1867, p. 543. I have Mr. John Wood's kind 



forms 



permission 



Wood 



hbourhood of the articulation between the internal cuneiform 



My own description, which accompanied a copy 

 ' Muscular slip arising from the fascia in the 



hallux. April 1 7, 1867. 



•* 



with the tendon of the outer head of the 11 



1 Op. cit. pi. 256. fig. 6. » Op 



4 Op. cit. p. 50. 



