300 RECORD OF SCIENCE FOR 1887 AND 1888. 



O. C. Miirsb (159) gives a most valuable contribution to our knowledge 

 of Mesozoic mammals, and describes with illustrations the following 

 new species and genera : 



1. Allodon fortis, p. 331, pi. vii, f. 7-15. 



2. Ctenacodon potens, p. 333, pi. viii, f. 2, 3, 7, 8, 9. 

 o < Asthenodon (gen. nov.), p. 336, pi. ix, f. 6, 7. 



■ ( Asthenodon segnis, p. 33(), pi. ix, f. G, 7. 

 4. Laodon vcmtstus, p. 337, pi. ix, f. .5. 

 cr J Ennvodon (gen. nov.), p. 339, pi. x, f. 4. 



I Enncodon crassiis, p. 339, pi. x, f. 4. 

 6. Enneodon affinis, p. 339. 

 «, ( Menacodon (gen. nov.), p. 340, pi. x, f. 5, G. 

 ' I Menacodon rarus, p. 340, pi. x, f. 5, 6. 



Priacodon (gen. ixoy.), p. 341, pi. x, f, 9, (type Tinodon ferox, Marsh, 1880), pi. 

 X, f. 9. 

 Q ( Paurodon (geu. nov.), p. 342, pi. x, f. 7, 8. 

 ' I Paurodon ralcns, p. 342, pi. x, f, 7. 8. 



These are distributed among the following families, viz, 1 and 2 in 

 PlagiaulacidfB, 3 and 4 with Dryolestes in Drj^olestidic, 5 and 6, and 

 Diplocynodon and Docadon in the family Diplocynodontidai, 7 in the 

 family Spalacotheridfe, the genus Tinodon in the family Tinodontidse, 

 Triconodon and the new genus Priacodon in the family Triconodontida^, 

 and 8 in the family Paurodontidai. 



The author regards none of the known Mesozoic mammals as truly 

 herbivorous. The Triassic mammals belonging to the two families 

 Dromatheridte and Microlestidie are quite distinct from any of the Ju- 

 rassic forms. With a few exceptions the Mesozoic mammals best pre- 

 served are manifestly low generalized forms without any distinctive 

 marsupial characters (p. 344). They are distributed by the author in 

 the three orders, Pantotheria (Mursli, 1880), AUothcria (Marsh, 1880), 

 and MarsuiyiaUa ; the families Plagiaulacidfe and Microlestidti; alone 

 being referred to the latter order. Tlie paper (160) in the Geological 

 Magazine appears to be a republication of the above. 



H. F. Osborne (203, 210) published an abstract of a paper on Mesozoic 

 mammalia in the Proceedings (203), which is published in full in the 

 Journal (210) of the Academy of Natural Science, Philadelphia. The 

 author classities the Mesozoic mammals primarily into two groups : (i) 

 The suborder il/wZ^i^wftercwZato, Cope, 1884 ; (ii) A suborder, possibly 

 equivalent to Pohjprotodonia, called by him '■'■ proto-Marsnpialia,'''' j>. 10. 

 In the suborder MuUitnherculata are included the families, l.Plagiaula- 

 cida3, Marsh ; 2. BolodontidiP.. 



In the suborder "pro/o-ilfar.s?/j>?n(7ia " are arranged in several sub- 

 groups the following families : 



Carnivorous sub-group, A. (1) Triconodontida^ (Marsh) ; (la) Phas- 

 colotherida^ (Owen) ; (*3) Spalacotheridie (Owen), (''equivalent to Tino- 

 dontidre. Marsh"). Omnivorous sub-group, B. (4) Peralestidte (and ? 

 Paurodontidne, Marsh), and Diplocynodontida' (Marsh). Insectiv;orous 

 subgroup, (3) Amplotheridne, C. (5) Stylodontidse (Marsh). Herbiv- 



