88 MESSRS. MURIE AND MIVART ON THE 
Of great length in Galago crassicaudatus (Pl. V. fig. 24, and Pl. VI. fig. 30, Ab.m.d), 
also in Nycticebus (woodcut, fig. 21). 
Fig. 21. 
p) Enlarged view of the plantar surface of the 
: foot of Nycticebus tardigradus, to show the 
small muscles of the hallux and fifth 
digits, the interossei, and the lumbricales 
attached to the outwardly dragged flexor 
tendons.—From P.Z.§. 1865, p. 254. 
It is the same in Tarsius (p. 82, tab. 5. fig. 9, no. 47), where it is even larger than in 
Galago, because of the still larger tarsal bones. 
ABDUCTOR OSSIS METACARPI QUINTI!.—It arises from the peroneal side of the os calcis, 
and is inserted into the base of the fifth metatarsal towards its peroneal side. It is 
much smaller than the abductor minimi digiti. 
The muscle represented in LZ. varius in Cuvier’s ‘ Receuil,’ pl. 70. fig. 1, 0, is probably 
this muscle, although erroneously called the accessorius. 
Very diminutive, and partly fused with the abductor minimi digiti in L. nigrifrons. 
It is represented in Galago crassicaudatus (Pl. II. fig. 3, Pl. V. fig. 24, and Pl. VI. 
fig. 50, Ab.o.m.q) and G. garnettii by a fair amount of muscular fibre, which occupies 
the outer and plantar aspect of the os calcis. Its broadish tendon is inserted into the 
proximal end of the fifth metatarsal. We traced it in G. allenii beyond the cuboid, 
although it possibly may go to the fifth metatarsal. 
The Accerssorius is entirely absent in Lemur catta, the Galagos, Nycticebus, Tarsius, 
and Cheiromys, unless the deep fleshy belly of the flexor brevis digitorum be in part 
regarded as such. What is called in Cuvier’s ‘Receuil’ the ‘“accessorius,” pl. 70. 
fig. 1, 0, is, in all probability, really the extensor ossis metacarpi quinti. 
InterossEI or Foor.—In Lemur catta there are two to each digit, except the hallux, 
and counting the flexor brevis minimi digiti as one. Over and above these there is a 
more superficial slip or belly arising from the tarsal fascia, and going to the peroneal 
‘In Tarsius, Burmeister, 1. c. p. 82, tab. 5. fig. 9. no. 46, that anatomist’s abductor digiti minimi externus. 
