286 PAL^ON-TOLOGT. 



Diplacodon (n. gen.) elatiis, U. Eocene, connects Limnohyus with Bron- 

 totheridce, differing from the latter in dentition and the absence of 

 horns. Orohippm Uintensis, U. Eocene, ia indicated by teeth. Meso- 

 hippus (n. gen.), Miocene, includes J/. BaircU^ Leidy, and M. celer. 

 Marsh, and connects Orohippus v^ith. Anchither'mm,. ThinoJiyus (n. gen.) 

 lentils, and T. socialis are new Peccaries from the Miocene of Oregon. 

 Eporeodon^ n. gen., is proposed, with E. occidentalls, Marsh, as type. 

 Agrioclioerus pumllus is a Miocene Artiodactyle. L. C. M. 



Marsh, 0. C. On the Odontomithes, or Birds with Teeth. Amer. 

 Journ. vol. x. pp. 1-7, pis. ix., x. ; Anier. Nat. vol. ix. pp. 625-(331, 

 pis. ii., iii. ; Jouni. Zool. t. iv. pp. 494-502, pi. xv. Beprinted in 

 Geol. Mag. dec. ii. vol. iii. pp. 49-53, pi. 2 (1876). 

 Ichthyornis dispar^ Marsh, Apatornis celei% Marsh, and ffesperornis 

 regalis, Marsh, have been previously described from the U. Creta- 

 ceous of America. They are here compared and placed in two new 

 orders : — 1. Ichthyorxithes. Teeth in sockets. Vertebrce biconcave. 

 Sternum with keel. Wings well developed. Ichthyornis., Apatornis. 

 2. 0D0NT0LCJ3. Teeth in grooves. Yertebrse as in recent birds. Sternum 

 without keel. Wings rudimentary. Hesperornis, L. C. M. 



Martyn, Dr. S. On Fish Eemains in the Bristol Old Bed Sandstone. 

 Proc. Bristol Nat. Sac, n. ser. vol. i. part ii. pp. 141-144. 



Becords the discovery of Ichthyolites in the U. Old Ked Sandstone. 

 The remains comprise one tooth or spine, and plates of bone either 

 belonging to the head covering or to scales of fishes. H. B. W. 



Merian, Prof. P. Ueber einen angeblichen Embryo von Ichthyo^ 



saurus. [A Beputed Embryo of Ichthyosaurus.^ Verh. nat. Ges. 



Basel, Th. vi. pp. 343, 344. 



In former cases the head of the small one has been turned towards 



the tail of the larger one ; in the present case, from the U. Lias of 



Wurtemberg, the included one lies with its head towards the head of 



the larger Ichthyosaurus. Hence probably not an embryo, but a smaller 



animal that has been swallowed. E. B. T. 



Miall, L. C. [Second] Report on the Structure and Classification of 

 the Labyrinthodonts. Bep. Brit. Assoc, pp. 149-192, pis. iv.-vii. 



The characters of the order are given. A new classification into the 

 following sub-orders is proposed: — 1. EroLTPXA (MastodonsauruSj 

 Lahyrinthodon, &c.). 2. Brachiopina (Brachyops, &c.) 3. Chaijlio- 

 DONTA {Loxomma, &c.). 4. Athroodonta {Batrachiderpeton, Pteroplax). 

 5. Uncharacterized. 6. Archegosauria. 7. Heleothrepta {Leptcr- 

 peton). 8. Nectridea (Urocordylus, Keraterpeton). 9. Aistopoda 

 (Ophiderpeton, Dolichosoma). 10. Microsauria, Dawson. Under these 

 heads are given the structure, measurements, locality, and bibliography 

 of the well-investigated species. She remainder are arranged alpha- 

 betically in an appendix. An analysis of generic characters is given, 

 and tables of distribution.. The plates are restorations of skulls of the 

 principal genera. L. C. M. 



