58 Mavim. 
MAMMALIA. 
Didelphyidac. 
Didelphys incertus, sp. n. (foss.), Gervais & Ameghino, op. cit. (gen. 
subj.) p. 223, S. America. 
Plagiaulacidj:. 
^ Thylacoleo carnifex. On an outline of its skull ; It. Owen, Geol. Mag. 
(2) x. p. 289, pi. vii. On its affinities and skeletal characters ; id. Phil. 
Tr. clxxiv. pp. 575 & G39, pis. xxxix.-xli. & xlvi.; abstracts in P. R. 
Soc. xxxv. pp. 19 & 1G3. The author shows that several parts of the skele- 
ton of this animal strongly resemble the corresponding parts in the pla- 
cental carnivores, evidence confirmatory of his opinion that Thylacoleo 
was carnivorous in its habits. 
“"I Neoplagiaulax . On this Eocene genus, and its relations to the Mesozoic 
Plagiaulacidce ; Lemoine, Bull. Soc. Geol. xi. pp. 249-271. 
'SChirox plicatua , g. & sp. nn. (foss.), E. D. Cope, P. Am. Phil. Soc. xxi. 
p. 321, Puerco Eocene. 
J Catopsalis fissidens, sp. n. (foss.), id. 1. c. p. 322, Puerco Eocene. 
Genera incermi sedis. 
Sthenomerus charon, g. & sp. nn. (foss.), C. W. De Vis, P. Linn. Soc. 
N. S. W. viii. p. 11, Gowrie Creek, Queensland. “In dentition the ani- 
mal diverges considerably from Nototherium — more so from Diprotodon ; 
its divergence is towards the Macropodidce. ” 
Sceparnodon ramsayi , g. & sp. nn., R. Owen, P. R. Soc. xxxvi. p. 3, 
Australia. Of about the size of Diprotodon , with remarkable scalpri- 
form incisors. 
Pleuraspidotherium. Note on this genus ; Lemoine, Bull. Soc. Geol. 
xi. p. 349. 
MONOTREMATA. 
0 RN ITHORR H YNOIII DiE . 
Albrecht, P. Sur la fente maxillaire double sous-muqueuse, et les 4 os 
intermaxillaires de l’Ornithorynque adulte normale. Bruxelles: 
1883, 8 vo. 
[Not seen by Recorder; cf. Zool. Anz. vii. p. 334.] 
^ Lankester, E. Ray. On the right cardiac valve of Echidna and of 
Ornithorrhynchus. P. Z. S. 1883, p. 8, pis. iii. & iv. 
Further researches, based on more abundant material, on the subject 
noted last year [Zool. Rec. xix. Mamin, p. 39]. The heart of Echidna 
is intermediate between those of Ornithorrhynchus and other Mammals. 
