300 RECORD OF SCIENCE FOR 1887 AND 1888. 



O. C. Marsli (15'J) jj;ives a most valuable coiitribntioii to our knowledge 

 of Mesozoic mammals, and describes with illustrations the iollowiug 

 new species and genera : 



1. Allodon fortis, p. 331, j)]. vii, f. 7-15. 



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

 o ^ Asthenodon (f?en. nov.), p. 336, pi. ix, f. 6, 7. 



■ I Asthenodon seynis, p. 336, pi. ix, f. 6, 7. 

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



t- J Euneodon (gen. nov.), p. 339, pi. x, f. 4. 



' ■ \ Euneodon crassus, p. 339, pi. x, f. 4. 



6. Enneodon affinis, p. 339. 



J < Mcnaeodon (geu.uov.), }». 340, pl.x, f. 5,6. 



■ ( Menacodon rarus, p. 340, pi. x, f. 5, 6. 



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

 x, f. 9. 

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

 Paurodon valeus, p. 342, pi. x, f. 7. 8. 



\ 



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

 Plagiaulacidai, 3 and 4 with Dryolestes in Dr^^olestidie, 5 and C, and 

 Diplocynodon and Docadon in the family Diplocynodontid?e, 7 in the 

 family SpalacotheridiB, the genus Tinodon in the family TinodontidaB, 

 Triconodon and the new genus Friacodon in the family Triconodontidaj, 

 and 8 in the family Paurodontida3. 



The author regards none of the known Mesozoic mammals as truly 

 herbivorous. The Triassic mammals belonging to the two families 

 Dromatherida3 and Microlestidai 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 (Marsh, 1880), Altotheria (Marsh, 1880), 

 and MarsupiaJia; the families Plagiaulacidte and Microlestidiie alone 

 being referred to the latter order. The paper ( 160) iu the Geological 

 Magazine ai)pears to be a republication of the above. 



H. F. Osborne (203, 210) published an abstract of apaperon Mesozoic 

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

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

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

 The suborder Multituberculata, Cope, 1884 ; (ii) A suborder, possibly 

 equivalent to Polyprotodonta, called by him ^^ proto-Marsupialia," p. 10. 

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

 cida3, Marsh ; 2. Bolodontida^. 



In the sahorder ^'■proto-Marsupialia^^ are arranged in several sub- 

 groups the following families : 



Carnivorous sub-group, A. (1) Triconodontidaj (Marsh) ; {la) Phas- 

 colotheridte (Owen) ; (2) Spalacolheridii; (Owen), ('' equivalent to Tino- 

 dontidrt?. Marsh"). Omnivorous sub-group, B. (4) Peralestidic (and ? 

 Paurodontid;e, Marsh), and Diplocynodontida' (Marsh). Insectivorous 

 subgroup, (3) Amplotheridse, C. (5) Stylodoutid* (Marsh). Herbiv- 



