﻿CRETACEOUS BRACHIOPODA. 



23 



remarkably parallel in their arrangement. The species occurs often in the Upper Chalk 

 of Grays and Charlton, also in the Lower Chalk of Guildford and Croydon. 



8. Thecidium Earingdonense, Meyer, MS. Dav., Sup., PI. II. figs. 11, 11 «, 12 a. 



Thecidium Wetherelli, Dav. (Not of Morris.) Cret. Mon., pi. xii, fig. 39. 



In external shape and dimensions this species seems nearly allied to the preceding 

 one. It differs, however, in the more elongated form of the attached valve and in the 

 arrangement of the lamellar processes. In the interior of the smaller or dorsal valve 

 there appear to exist some small differences which would help to distinguish it from 

 Th. Wetherelli, but I have not been able to procure specimens sufficiently perfect to 

 enable me to make out all its characters. It is very abundant in the Sponge-gravel at 

 Earingdon. 



Mr. Meyer has likewise discovered some very transverse attached valves, of perhaps 

 another species, in the Chloritic Marl (or top of Upper Greensand) at Dunscombe 

 Cliff, between Sidmouth and Beer Head, but not sufficiently perfect to admit of specific 

 determination. 



9. Argiope Bronni, von Hag. Dav., Cret. Mon., PI. Ill, figs. 1 — 13, and PI. XII, 



figs. 37, 38. 



Argiope decemcostata (Roem.), Dav. Cret. Mon., p. 16, pi. iii, figs. 1 — 13. 



Dr. Schloenbach would refer figs. 8 and 9 to A. BucJdi, von Hag., and figs. 1, 7, 12, 

 and 13 to A. Bronni, of the same palaeontologist. I am, however, very much disposed 

 to believe them all referable to a single species, although PI. XII, fig. 37, represents the 

 original figure of von Hagenow's A. Bronni, while fig. 38 illustrates his A. Buchii. 

 When one examines a number of specimens they seem to graduate one into the other, so 

 that, unless we deal only with typical examples, the intermediate forms could scarcely be 

 referred more correctly to one than to the other. 



10. Argiope megatrema, Soto. Dav., Cret. Mon., PI. XII, figs. 31, 32, and 34 — 36. 



Dr. Schloenbach seems disposed to refer figs. 35 and 36 to A. decemcostata, Roemer, 

 while admitting that figs. 31, 32, and 34 represent A. megatrema; but I am not 



