IlfVERTEBBATA. 293 



Davef, E. C. The '' Sponge-gravel " near Faringdon. Photographs 

 and notes of fossils, see p. 8. 



Davidson, Thomas. Monograph of the British Fossil Brachiopoda, 

 vol. iv. part i. Supplement to the Becent, Tertiary, and Cretaceous 

 sp., pp. 1-72, pis. i.-viii. ralseont. Soc. vol. xxvii. 



Includes descriptions and figures of species which have been dis- 

 covered since the Monograph was published, or concerning which fresh 

 knowledge has been obtained. The author first notes the occurrence, 

 habitat, &c. of 12 recent species which have been found in British 

 seas. 2 species are next noted as occurring in the Post-Tertiary Clays 

 of Scotland. Not a single new Brachiopod has been found in British 

 Tertiary beds since the publication of the original monograph, 23 years 

 ago. Mr. Davidson, however, gives additional information with respect 

 to 9 Tertiary species. After a discussion of the improvements in the 

 divisions of the British Cretaceous system as the result of the observa- 

 tions of many observers both at home and abroad, the author gives a 

 full account of all the additional information which has been obtained 

 with regard to the British Cretaceous Brachiopods. In addition to the 

 50 species described in the original monograph, the author now records 

 the occurrence of 31 species, and 10 varieties since discovered. Most 

 of these have been previously recorded ; but Waldheimia Walkeri, 

 HhynchoneUa Upwarensis, B. Cantahrigensis, R. Walkeri, and H. 

 Speetonensis are described as new. H. A. N. 



. Observations on the Genus Poinmbonites. Geol. Mag. dec. 



2, vol. i. pp. 51-54, pi. iii. 



Describes and figures the internal characters of shells of the genus. 

 Concludes that the species of this genus form a small subfamily 

 among the Brachiopoda, in which the shell was " attached, at least during 

 a part of its existence, by means of a pedicle, or its representative. 

 No calcified process is observable for the attachment or support of 

 the oral appendages, which were no doubt fleshy and spirally coiled. 

 There are also in the interior of each valve diverging dental and socket- 

 plates, which laterally circumscribe the central muscular space. 

 Poramhonites differs materially from Pentamerus and other genera by 

 its internal arrangements ; nor is there any apparent ground why it 

 should be located in the family BJiynchonelUdce." H. A. N. 



. On the Tertiary Brachiopoda of Belgium &c. Geol. Mag. 



dec. 2, vol. i. pp. 150-159, plates vii., viii. 



After a preliminary discussion of the subdivisions of the Belgian 

 Tcrtiaries, the author enumerates the species of Brachiopoda which 

 have been found in them. The following species have come under the 

 author's observation : — ] . From beds of tlie age of the Lower Pliocene 

 — Lingida Diimortieriy Terchratula grandis, Terehratidina caput-serpen- 

 tis, lihynchonella Nysti^ and 11. psitiacca. 2. From beds of the age of 

 the Miocene — Mannla Nystl^ Discina Ny»ti, and TerehratuUna ornata. 

 3. From beds of the age of the Eocene — Argiope Lefevreiy TerehratuUna 



