32 NOTES ON THE BRITISH JURASSIC BRACHIOPODA. 



ornamentation — some are almost circular, others sub- 

 quadrate, transverse, or elongated. In general appearance 

 tlie shell is patelliform. 



Its range in time is from the Silurian up to existing seas, 

 where four or five species are found. 



Four species are recorded from the Lias, and three from 

 the Oolites. 



Localities. 



C. antiquior, Jelly, Gt. Oolite, Hampton Cliff, near Bath. 



C. canalis and sandersii, Moore, Inferior Oolite, Dandry. 



The types of G. canalis and sandersii were, I believe, both 

 found in the Inferior Oolite of Dundry by Mr. Moore, and 

 named by him ; but both are missing from his collection in 

 the Bath Museum. 



CADOMELLA, Munier-Chalmas, 1887. 

 Etym. — CadomuTn, Caen, uam.e of a town. 

 Syn. — Lejotcena (?), Davidson, 1884. 



CEhlert describes the shell of Cadomella as " nearly flat 

 or slightly concavo-convex, with a transverse form ; cardinal 

 line long and straight; umbo of ventral valve scarcely more 

 prominent than that of the dorsal valve ; area linear, with 

 pseudo-deltidium and ' fcalon ' of the process prominent " 

 (16, p. 1285). This is followed by an excellent diagnosis of 

 the internal structure ; i.e. cardinal teeth, muscles, median 

 septum, etc. 



The type of the genus is the Leptcena (?) tnoorei of 

 Davidson, which was found so plentifully by Moore, with 

 G. (?) davidsoni, E. Desl., in the Leptaena (?) beds of the 

 Upper Lias of Ilminster. 



Gadomella is apparently confined to the Lias, and in this 

 country is represented by the two species above named. 



As in Zellania, Spiriferina, and Kdn{7ickella, the animal is 



