390 THE MEDALS OF CREATION. Cuap. XI. 
when highly magnified, is shown jig. 24, Lign. 126.* The 
Rhynchonelle (as Lign. 125, figs. 1, 2,) do not possess this 
organization. 
Several species of Terebratula are found both living and 
fossil, e.g. Terebratula vitrea, living in the Mediterranean, 
fossil in Sicily,—Z". caput serpentis, recent in the British 
seas, fossil in the Crag,—and 7’. lenticularis, both recent and 
fossil in New Zealand. 
ls iy" 
say Cr Sa, 
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i, tl ate ul Hu th 
' MOI Pig ut fi e 
Bin nt 
Lien. 126. TEREBRATULA AND SPIRIFER. 
Fig. 1 and 2.—Upper and under valve of TEREBRATULA CARNEA. 
Chalk ; Lewes: a, a, remains of the calcareous support of 
the brachia. 
2a,—Portion of the shell of Terebratula carnea, magnified to 
exhibit the perforations. 
3.—SPIRIFER TRIGONALIS, with part of the upper valve re- 
moved, to show one of the spiral processes. (Min. Conch.) 
Mountain Limestone. 
SPIRIFER (containing spiral processes). Lign. 126.—In 
the Silurian, Devonian, and Carboniferous limestones there 
is a profusion of several genera of Brachiopoda, whose 
* An interesting Memoir on the Microscopal Examination of 
Shells has recently been communicated to the Royal Society by Dr. 
Carpenter. 
