6 Professor 0. C. Marsh — European Dinosaurs. 



fully 2\ inclies deep and the centrum 4 inches long, has no 

 transverse process, and shows no indication of a chevron facet, 

 though the base of the articulation is somewhat thickened behind. 

 A still later vertebra has the centrum 3 inches long, and the articular 

 face 1| inch deep by l-^V inch wide. The caudal vertebrae continue to 

 diminish in length, and the neural arch becomes compressed from 

 side to side, but remains well developed, and nearly an inch longer 

 than the centrum. The pre-zygapophyses look obliquely upward 

 and forward, and receive the wedge of the posterior zygapophyses 

 between them. There appear to be faint indications of very small 

 chevron bones in these latest vertebrae. It is possible that the 

 smaller caudal vertebras belong to Avalonia. 



These vertebral characters indicate an animal closely allied to 

 Avalonia, but well distinguished by the lateral compression of the 

 centrum, supported by the singular form of the tooth crown, obliquely 

 serrated at the margin, and ribbed on the inner side. 



EXPLANATION OF PLATE I. 



Avalonia Sanfordi, Seeley. 

 Fig. 1. — Anterior aspect of left femur, a, articular head ; b, ridge representing the 



trochanter major ; c, broken base of the inner lateral trochanter ; d, inner of 



the larger distal condyle. 

 Fig. 2. — Posterior aspect of a dorsal vertebra. 

 Fig. 3. — Eight side of a dorsal vertebra, showing (/) the capitular and (t) tubercular 



facets, and the zygapophyses. 

 Fig. 4. — Side view of claw phalange and penultimate phalange of hind foot. 

 Fig. 0. — Articular end of claw phalange. 



F'lcrodon Herveyi, Seeley. 

 Fig. 6. — Dorsal vertebra, posterior aspect. 

 Fig. 7. — Same vertebra, lateral aspect. 

 Fig. 8. — Early caudal vertebra, lateral aspect. 

 Fig. 9. — Late caudal vertebra. 



Rhsetic Beds: Wedmore Hill (Yale of Glastonbury), Somerset. 

 See also note on some Ehsetic Foraminifera from Wedmore, by F. Chapman, 

 1895, Ann. and Mag. Nat. Hist., vol. xvi, p. 305. 



n. — Eecent Observations on European Dinosaurs. 



By Professor 0. C. Marsh, M.A., Ph.D., LL.D., F.G.S.; 

 of Yale College, New Haven, U.S.A. 



BUEINGr the past summer, it was my privilege to attend the 

 International Congress of Geologists at St. Petersburg, as an 

 official delegate from the United States, and this gave me an 

 opportunity to see a number of museums and collections in 

 Europe which I had not before visited. I thus had the privilege 

 of inspecting personally many interesting reptilian remains that 

 I had not previously known, and of examining others which were 

 more or less familiar to me from figures and descriptions. 



In the present paper, I have only time to speak of the Dinosaurs, 

 in which I have long taken a special interest, and have endeavoured 

 to study all the known specimens of importance, both in this 

 country and in Europe, haviug in view the preparation of a series 



