6 Alhani/ Jiiisctdi) llcconk. 



No. 7. A slub showing on the one side portions of most of the 

 bones of the side of a small skull, including those of the mandible 

 — considei-ably weathered : and on the other sitle four imperfect 



ribs. 



Brakriver. Pres. by.MR. R. Harvey. 



No. 8. Slab with the parietals, interparietal, and right post- 

 orbital of a verj' small skull : and also portions of 5 ribs. 



Brakriver. Pres. by Mr. R. Harvey. 



No. 9. a, b, c, d, e. Five small slabs with portions of ribs and 

 vertebrae from the same locality as the above skulls, and probably 

 belonging to the same individual as one uv other of the skulls. 

 Brakrivei-. Pres. bv Mr. R. Harvey. 



Li/strosaiifKs (Icdivis (Owen). 



No. 10. An almost complete skull of an individual probably 

 somewhat immature. In all its characteis it agrees closely with 

 the type skull. The lower jaw is in position but it is largely 

 covered by matrix. The prepa'-irtal is vei'y similar to that in 

 L. latu'(>,stn'.s. 



Loc. unknown. Pres. l)v Mr. W.J, COLEMAN. 



Li/strosmirus McCaifj', Seeley. 

 No. 11. This magnificent skflll which was developed under 

 Prof. Seeley's direction is i-eferredto by him in his paper "On the 

 Skull of MochlorJiinus plati/cfips,'' (Ann. and Mag. Nat. Hist., Feb. 

 1(S'.)(S), l)ut I am not aware that the skull has been either 

 descril)ed or figured. It is by far the largest of the known species 

 of Lystrosaurus — the skull measuring from the front of the 

 maxillary to the back of the parietal no less than ',V,)() m.m., and 

 the orbit being KM) m.m. across. It differs from the species 

 described l)y Owen, mainly in being much narrower proportionally 

 and in having very large supi'aorl)ital crests. The snout is 

 modei-ately straiglit, and has a median ridge running iip it, foi-med 

 almost entirely by the premaxillary. The largi- supraorbital crests 

 are formed almost entirely by the [)refroiitals. Between the crests 

 there is a small median ci-est probably formed by the frontals, and 

 slightly in front of the large crest and considerably internal to 

 them are a pair of small crests probably also formed by the pre- 



