386 PROF. HUXLEY ON THE STOMACH (Apr. LI, 
O. anatinus, Gould, Mamm. Austr. i. t. 1. 
O. brevirostris, Ogilby, P. Z.S. 1831, p. 150. 
O. rufus, Leach, Zool. Mise. 136. 
O. fuscus, Leach, Zool. Misc. ii. 136, t. 111. 
O. crispus et O. levis, Macgillivray, Mem. Wern. Soc. v. 127. 
Duck-billed Platypus, Shaw. 
Ornithorhynche, Cuv. Oss. Foss. v. 143, t. 14 (skeleton). - 
Hab. South-eastern Australia and Van Diemen’s Land. 
17. EcuipNa. 
Beak elongate, cylindrical, attenuated. Mouth small, terminal. 
Tongue very long. Body covered with spines. Tail very short 
Osteology, Cuv. Oss. Foss. t. 13 (shield). 
Echidna, Cuy. Tabl. Elém. 143, 1797. 
Tachyglossus, Illiger, Prod. 1811. 
Ornithorhynchus, sp., Home. 
Myrmecophaga, sp., Shaw. 
EcuHIDNA ACULEATA. 
Echidna australiensis, Less. Man. 318. 
E. hystrix, Cuv. R. A. i. 226; Leach, Zool. Mise. ii. t. 90 ; Gould, 
Mamm. Austr. i. t. 2; Gerrard, Cat. Bones B. M. 288. 
E.. longiaculeata, Tiedem. Zool. i. 592. 
Myrmecophaga aculeata, Shaw, Nat. Misc. t. 109, 1792. 
Tachyglossus aculeatus, Ilig.; Schreb. Saugeth. t. 63 B. 
T. hystrix, Wagner; Schreb. Saugeth. iv. 242. 
Ornithorhynchus hystrix, Home, Phil. Trans. 1802, p. 348. 
Porcupine Anteater, Shaw. 
Echidne, Cuvier, Oss. Foss. v. 144, 613 (skeleton). 
Hab. Australia. 
Var. More hairy. 
Echidna setosa, Cuv. R. A. i. 226; Gould, Mamm. Austr. i. t. 3. 
E. brevicaudata, Tiedemann, Zool. i. 392. 
Tachyglossus setosus, Iliger ; Schreb. Saugeth. t. 63. 
Hab. Van Diemen’s Land. 
5. On THE STRUCTURE OF THE STOMACH IN DESMODUS RUFUS. 
By Pror. T. H. Huxuey, F.R.S., V.P.Z.S. 
According to Cuvier (Lecons, ed. 2, t. iv. pt. ii. p. 31), the Chei- 
roptera exhibit three principal forms of stomach, which are related 
to their varied food. There is the transversely elongated tubular 
stomach possessed by those Cheiroptera which live on fruit ; the glo- 
bular stomach, with closely approximated cardiac and pyloric orifices, 
exhibited by the specially insectivorous Bats ; and the longitudinally 
elongated, conical stomach, with a pyloric cecum, found in those 
Bats which suck the blood of other animals. By way of commen- 
