SPECIAL WORK. 
Mamm. 63 
describes and figures a sternal gland resembling that of Myrmecobius 
[Zool. Rec. xxiv, Mamin, p. 55]. 
Didelphys {Micourevs) lepida , n. sp., 0. Thomas, Ann. N. H. (6) i, p. 158, 
Peruvian Amazons. Figured, Cat. Marsup. Monotrem. B. M. pi. iii, fig. 1. 
Didelphys ( Peramys ) scalops, n. sp., Thomas, l. c., Brazil. Figured, 
t. c. pi. iii, fig. 2. 
Didelphys ( Peramys ) iheringi, n. sp., Thomas, op. cit. p. 159, Rio 
Grande do Sul. Figured, t. c. pi. iv, fig. 2. 
Didelphys {Peramys) henseli , n. sp., Thomas, l. c.ibid. Figured, t. c. 
pi. iv, fig. 1. 
i. Amphjtheriid/e. 
(Employed in the sense noticed in Zool. Rec. xxiv, Mamm. p. 55.) 
\Amphitylus oweni, n. sp., H. F. Osborn, J. Ac. Philad. ix, p. 192, Lower 
Jurassic, England. 
tj Vicrocynodon, n. n., Osborn, op. cit. p. 263. To replace Diplocynodon , 
Marsh [preoccupied]. 
IN CERT ML SEDIS. 
MULTITUBERCULATA. 
A note on this group given by E. 1). Cope, Am. Nat. xxii, p. 12, with 
woodcut, suggesting their affinity with the Monotremata. [See also 
Osborn, supra , p 59.] 
11. MONOTREMATA. 
See 0. Thomas, Catalogue of Marsupialia and Monotremata in the 
British Museum {supra, p. 59). In this work one species of each of the 
three general Omithorhynchus , Echidna , and Proechidna is admitted, the 
last-named genus being only adopted with hesitation. 
Seeley, H. G. On the Nature and Limits of Reptilian Character in 
Mammalian Teeth. P. R. Soc. xliv, pp. 129-141. 
In the course of this paper the author gives his reasons for regarding 
the horny oral plates of Omithorhynchus as representing true teeth in 
course of degeneration. 
a. ORNITHORHYNCHIDiE. 
Omithorhynchus anatinus : a note on the manner of suckling, as 
observed in very young specimens, is given in Sci. Goss. 1887, p. 68. R. 
Lendenfeld, supra , p. 58, has notes on its habits. 
Poulton, E. B. The True Teeth and the Horny Plates of Ornitho- 
rhyncus. Q. J. Micr. Sci. xxix, pp. 9-48, pis. ii-iv. 
Describes and figures the microscopic structure of the teeth and horny 
plates, and shows that they are totally distinct. Mivart’s hypothesis of 
the dual origin of Mammals {supra, p. 14) is discussed, and considered 
untenable ; while Seeley’s suggestion ( suprd ) that the horny plates 
are degenerate teeth is likewise disposed of. Cope’s suggestion of the 
Monotrematous affinity of the Multituberculata is also noticed. 
