1865. | OF ENTOMOPHAGOUS EDENTATA. 385 
broad; nose moderate, slender, shorter than the brain-case. The 
ribs are very broad, dilated, forming a solid armour to the chest, 
and overlapping each other (see Rapp, t. 5. f. 3, 4, 5). 
Cyclothurus, Gray, Cat. Mamm. B. M.; Turner, P. Z.S. 1851, 
p- 218. 
CYCLOTHURUS DIDACTYLUs. B.M. 
Fulvous back, blackish-washed ; feet and tail grey, longer hairs 
with minute black tips. 
Myrmecophaga didactyla, Linn. S. N. i. 51 ; Rapp, Edent. 15, 
t. 5. f. 3-6 (skull) ; Blainv. Ostéogr. t. (skeleton). 
M. minima, Brisson, R. A. 28. 
Cyclothurus didactylus, Lesson ; Gray, Cat. Mamm. B. M. 191. 
Little Ant-eater, Edw. Glean. i. 220, t. 220. 
Fourmoulier a deux doigts, Cuv. Oss. Foss. v. 103. 
Hab. South America, Brazils. 
CycLoruurus porsauis. (PI. XIX.) B.M. 
Golden yellow, silky, back with a broad, well-defined black stripe ; 
feet and tail yellow. 
Hab. Costa Rica (Salvin). 
The back and sometimes the sides are washed with blackish. Al- 
ways known by the distinct, well-defined, broad dorsal streak, and 
the yellow colour of the feet and tail. 
Fam. 5. ORNITHORHYNCHID2. 
Body covered with hair or spines. Mouth in the form of a flat, 
depressed, or slender beak, subcylindrical. Hind feet of the male 
spurred. 
Skeleton with marsupial bone, and a merrythought ( furcula) like 
that of birds. 
Monotrema, Geoff. 
Replantia, Mlliger. 
16, Puatypus. 
Beak depressed. Body covered with hair. Tail broad, short, 
depressed. Feet very short. Toes 5/5; front toes united by a web. 
Hind feet with an acute spur on inner side. 
Platypus, Shaw, Viv. Nat. 1799. 
Ornithorhynchus, Blumenbach, Handb. 135, 1800. 
Ornithorhynque, Cuv. Oss. Foss. t. 14. 
Demipus, Wiedem. Zool. Arch. i. 175. 
PLATYPUS ANATINUS. 
Platypus anatinus, Shaw, Nat. Misc. t. 385; Gen. Zool. i. 229, 
t. 66, 67, 1799; Gerrard, Cat. Bones B. M. 288. 
Demipus anatinus, Wiedm. Zool. Arch. i. 175, t. 
Ornithorhynchus paradowus, Blumenb. Handb. ed. 10, p- 135; 
Abbild. t. 41, 1800; Home, Phil. Trans. 1802, p. 87. 
