70 BRITISH FOSSILS. 



represents all the anterior segments we had observed when the 

 plates were engraved. But since their completion, a cast (agreeing 

 very nearly with the figures in Plate III.) of a line specimen of the 

 anterior body rings, and nearly a foot wide, has been sent up by 

 our correspondent, Mr. W. Miller of Dundee. It is from a new 

 quarry at Tealing, Forfarshire. The specimen is in the Museum 

 of the Watt Institution, Dundee, and a woodcut, one-fifth the 

 natural size, is given of it in p. 67. From the second to the ninth, 

 the segments are all united, and the anterior ones have slipped 

 a good deal over one another so as not to present quite their full 

 dimensions. 



1st Segment. This appears to be wanting both in the Tealing 

 specimen, and in the specimens figured in Plate IV. It was, pro- 

 bably, narrower than all the rest and had the outer posterior angle 

 much rounded off. 



2nd Segment. (Woodcut, No. 9). This is five times as wide as 

 long, somewhat arched in the middle, and much bent forward at the 

 sides, with indications of lateral processes a, a, similar to those in 

 the third segment. The lateral edges are very oblique : forming an 

 angle of about 70 with the posterior edge. 



3rd Segment, Plate VI. fig. 1. This is Agassiz's figured specimen 

 in his Table A, upper right-hand figure. It is four and a half times 

 as wide as long, our largest specimen above ten inches wide. The 

 posterior angles are rounded off, the anterior produced into lobes an 

 inch in length, a a. The lateral edges are less obliquely truncated 

 than in the second segment. 



4th Segment. Wanting in our plate ; it is the largest and broadest 

 of all in the Tealing specimen (woodcut 9) ; its sides are less oblique 

 than in the third segment. 



5th Segment, Plate IV., fig. 2. Fully five times as broad as long, 

 the sides are nearly rectangular, not oblique, the posterior angles 

 very little rounded, the anterior not (?) produced. Our largest speci- 

 men measures more than a foot wide and two inches and a half long. 



6th Segment, Plate IV. fig. 3. Of the same shape as the fifth, 

 but only four times as broad as long. 



Of the remaining rings, figs. 5, 6 show imperfect fragments. 

 They gradually taper backwards, as indicated by the dotted margins, 

 and become thus narrower in proportion to their length, but exhibit 

 no other difference, as we learn from the above perfect specimens, as 

 far as the ninth. 



Plate V. fig. 1, can scarcely be any but the tenth segment. It is 

 about once and a quarter as wide as long, the sides straight, and 

 the posterior angles a little produced. 



