492 PROCEEDINGS OF THE GEOLOGICAL SOCIETY. [June 13, 



pebbles, among which were mixed, in great disorder, bones and 

 horns of a Chamois, Oervus pseudovirginianus, G. megaceros, and Bos, 

 together with implements of stone and bone, to which MM. Isidore 

 Geoffrey Saint-Hilaire and E. Lartet have referred in the ' Comptes 

 Kendus ' of May 10, 1858. 



M. E. Lartet, in his letter, has furnished drawings and descriptions 

 of some barbed arrow-heads of bone, some having indented grooves, 

 probably for the appliance of poison ; also needles, and a flute-bevelled 

 tool of bone, a splinter or knife of hard flint, and the horn of an 

 Antelope hacked at the base, probably when the animal was flayed. 



3. On the Occurrence of Crag Strata beneath the Boulder-clay in 

 Aberdeenshire. By T. F. Jamieson, Esq. 



[Communicated by Sir R. I. Murcbison, V.P.GhS,] 



[See above, page 371.] 



4. On some small Eossil Vertebra from near Erome, Somerset- 

 shire. By Professor Owen, E.R.S., E.G.S., &c. 



I was favoured a short time since by receiving from Mr. Charles 

 Moore, F.G.S., the discoverer of teeth like those of Microlestes in a 

 probably Triassic deposit near Erome, an additional series of speci- 

 mens, including, together with teeth unequivocally mammalian and 

 having the characters of those of Microlestes, some vertebrae, more or 

 less mutilated, of corresponding size, and similar mineral condition. 

 These were discovered in a fissure containing derivations from the 

 " Bone-bed" and from earlier (Mountain-limestone) and later (Oo- 

 litic) deposits. 



A small glass tube, numbered " 5," was stated in Mr. Moore's list 

 to contain " two little vertebras." These I first examined. One 

 (and the most perfect specimen, figs. 1-5) is a dorsal, the other a 

 caudal vertebra ; both are biconcave (i. e. the articular ends of the 

 centrum are cupped); and in both the neural arch is confluent with 

 the centrum. 



The body of the dorsal vertebra is laterally concave both vertically 

 and lengthwise (fig. 3, c), the lower surface (fig. 5) being narrow, 

 prominent, like a smooth obtuse ridge, slightly concave lengthwise, 

 expanding somewhat, like the rest of the centrum, at the articular 

 extremities, c : these are deeply cupped, of a circular figure, with a 

 smooth, almost polished surface. A narrow parapophysis begins very 

 near the fore part of the side of the centrum, and is continued up- 

 ward and a little backward, contracted and ridge-like, to the di- 

 apophysis on the side of the neural arch, figs. 1,2, 4, d ; or, the par- 

 and di-apophyses are connected by an intervening ridge. On one 

 side there is a continuous abraded surface, which might have afforded, 

 when entire, a single articular surface to a rib ; on the other side of 



