348 'PHILOSOPHICAL TRANSACTIONS. [aNNO 1753. 



Fig. 4 is a fossil body, 10 inches in length, one part of which is rounded, and 

 the opposite part hollowed : this figure shows the hollow part, which from a to b 

 is more than one inch and half over ; the channel runs its whole length, and 

 where deepest is IJ- inch over, but it gradually becomes shallower and narrower 

 towards the smaller end. The sides are -^ of an inch in thickness. 



Fig. 5 shows the same fossil body with the rounded part upwards. Its sides 

 from a to b are 2 inches. Great numbers of black shining tubercles, of the kind 

 described fig. 3, but in general larger, and with less variation in their size as to 

 one another, are disposed in rows, pretty regularly in the manner shown in the 

 picture. Many of them appear starry or radiated with several fine lines from the 

 base to the apex, which lines rise a little, and in some positions to the light 

 appear of a whitish colour. Two separate figures of these tubercles are given 

 (p, q) to make this account the better understood. One is a side and the other 

 a front view. They are shown magnified about 8 times. 



Fig. 6 is a fossil body, much more solid and weighty than the former two. Its 

 length is 10 inches. It is rounded on the upper part, where the sides in the 

 broadest place are 1-j- inch : the under part has a hollow or channel 1-i^ inch in 

 depth, 7-r inch long, 1-^ inch over, its bottom rounded. From a 3 inches and a 

 half to b is quite solid, and at a in width 1-^ inch, whence it goes tapering to b, 

 where it is broken off so blunt, as to show that it must probably have extended 4 

 or 5 inches farther. In this solid part c stand many small teeth in rows, but not 

 quite regular ; some rows having but 2, some 3, and others 4. They begin an 

 inch distant from the channel, and went probably to the extremity that is broken 

 off. They are black and shining like those in fig 3, but the points somewhat 

 broken ; though when whole they must have been less hooked, and much smaller 

 than those. The rounded part of this fossil body has no tubercles like the other 

 two, though it is plainly a species of the same kind with them, but is pretty 

 strongly furrowed, and the ridges have the same black glossy polish as their 

 tubercles. 



Mr. Francombe writes, " that he met with these 2 bodies, fig. ] , 2, in a pit, 

 on the right hand side of the road, as you ascend Shotover-hill from Oxford. 

 The uppermost stratum in this pit consists of a yellow sandy earth ; the next a 

 brownish clay ; then a regular stratum of large stony nodules, about J 2 inches 

 thick ; then a dark blue clay, of about 10 feet ; and immediately under, a rock 

 of fi-ee-stone. About 2 feet above the free-stone were found the fossils, fig. ] , 

 2. The first was found at twice ; the second in searching to complete the first, 

 and both of them in many small pieces, as is evident from the bodies themselves, 

 which he carefully joined with some thick gum-water. That the first is of its 

 proper shape and figure plainly appears from the regularity of its tubercles ; and 

 the second is as he saw it himself in the stratum. In this clay are found bones 



