Mackintosh — Notes on the Myology of the Coati-Mondi, ^c. 55 



its parts being more or less fused. Popliteus ("OS) is normal and devoid 

 of a fabella in N. narica, with an insertion into nearly the upper half 

 of the tibia in N.fusca; in Martes there is a sesamoid in the tendon of 

 origin, the insertion is into the upper half of the tibia in one 

 specimen, and into the upper third in the other (smaller) one. 

 Gastrocnemius externus ('06) has a fabella, and is inseparable from 

 the next muscle at its origin in the coatis ; there is a fabella in the 

 origin in the larger of the two martins. Gastrocnemius internus ("07) 

 has no sesamoid iniV". narica and Martes, but there is a small one in N. 

 fiisca. Plantaris ("05) has the usual origin and insertion (plantar 

 fascia) ; there is a sesamoid in its origin in the coatis, but not in the 

 martins, in which animals this muscle is surrounded by gastrocnemius 

 externus. 



Solseus ('05) is fibular in origin and calcaneal in insertion as usual; 

 it is entirel}^ fleshy in l^asua and in one of the martins, in the other, 

 however, there is a tendinous origin becoming fleshy about half way 

 down the leg. 



Flexor digitorum longus ('04) and flexor hallucis longus ("08) are 

 both normal, the latter being as usual the larger. They unite to form 

 a single tendon, which again subdivides to send one tendon to each of 

 the five digits. Tibialis posticus ("04) arises as usual in Nasua, and is 

 inserted into the astragalus, scaphoid, and internal cuneiform bones ; in 

 Martes the origin is very high up on the tibia, and the insertion is into 

 the scaphoid only. Flexor digitorum brevis ('01) arises from the tendon 

 of plantaris, and is in fact the fleshy part of that mascle on the sole or 

 the foot ; it sends a tendon to each of the four digits. Flexori longo 

 accessorius ("02) arises from the calcaneum, and is inserted into the 

 side of the tendon formed by the union of flexor hallucis and flexor 

 digitorum. 



Tibialis antieus ("17) is single and normal in jSTasua, but in Martes 

 there are two separate muscles — one arising a little behind the other 

 from the top of the tibia ; the two tendons are inserted side by side. 

 Extensor hallucis ("02) arises from the upper half of the tibia, and 

 has the usual hallucal insertion in Nasua, but is absent altogether in 

 the martins. Extensor digitorum longus ('03) arises as usual from the 

 external condyle of the femur, and sends a tendon to each of the four 

 digits. Peroneus quinti ("01) brevis ("03), and longus (-04), present 

 no deviation from the ordinary carnivore type. Abductor ossis 

 metarsi minimi digiti is large in all, arising from the under surface 

 of the calcaneum, and inserted into the base of the fifth metatarsal. 

 Extensor brevis minimi digiti ("01) is normal in the coatis. In N. 

 fmca there is an abductor and an adductor for each digit, adductor 

 indicis being bicipital. In N. narica the muscles of the hind foot 

 ai'e — Adductor hallucis, extending from the head of the middle 

 metatarsal to the outer sesamoid bone ; abductor and flexor brevis hal- 

 lucis, normal; and interosseous abductor and adductor, each for index; 

 medius and annularis, and the latter of the two, for minimus, which 

 has a special abductor ; there is also a special abductor for the hallux. 



