366 ADDENDA. 



Rodriguez consists of a succession of lava-flows (12 noticed), sepa- 

 rated by beds of conglomerate or laterite. The basalt is dark, compact, 

 and columnar, becoming in places porphyritic. A coralline limestone 

 occurs in large sheets at the east and west of the island, and occasionally 

 in patches, overlying the basalt. There are raised beaches on the south. 

 Zeolites occur in the basalt. R. E., Jun. 



Barcena, Mariano. Descubrimiento de una nueva Especie mineral 

 in Mexico. [New Mineral, Mexico.] Naturaleza, t. iii. pp. 35-39. 

 Description of Livingstonite (see p. 223). 



. Yiaje a la Caverna de Cacahuamilpa. Datos para la Geologia 



y la Flora de los Estados de Morelos y Guerrero. Naturaleza, 

 t. iii. p. 75. 



. El Wad Oolitico. Naturaleza, t. iii. pp. 136-138. 



Barkas, "W. J. On the Microscopical Structure of Fossil Teeth from 

 the Northumberland True Coal Measures. Monthly Review of 

 Dental Surgery. 11 plates. 



Barrois, Ch. Sur la craie de Pile de "Wight. [Chalk of the Isle of 

 Wight.] Ann. Soc. Geol. Nord, t. i. pp. 74-81 ; Bull. Soc. Geol. 

 France, ser. 3, t. u. pp. 428-433. 

 A resume of a paper in the Ann. Sci. Geol. The zones described 

 are as follows, in ascending order : — Gault, 30 metres thick ; U. Green- 

 sand with Ammonites injlatus, 50 m. ; Chloritic Marl with A. laticlavivs, 

 2 m. ; Craie glauconieuse with Scaphites cequalis (Grey Chalk), 35 m. ; 

 Craie marneuse with Inoceramus lahiatus, 40 m. ; Craie marneuse with 

 TerehratuUna gracilis, 20 m. ; Craie blanche with Holaster planus, 20 m. ; 

 Craie blanche with Micraster coi'-testudinarium, 50 m. ; Craie blanche 

 with Micraster cor-anguinum, 160 m. ; Craie blanche with Belemnites, 

 80 m. The Chalk-rock lies in the zone of TerehratuUna gracilis ; the 

 equivalent of the Totternhoe stone in that of Inoceramus lahiatus. 



W. T. 

 Batjza, Felipe de. Breve resena geologica de la Provincia de Gerona. 

 [Brief geological sketch of the Province of Gerona.] Bol. Com. 

 map. geol. Espan. vol. i. 



Bayan, — . Sur la succession des assises et des faunes dans les 

 terrains jurassiques superieures. [Succession of the U. Jurassic 

 series.] Bull. Soc. Geol. France, 3 ser. t. ii. pp. 316-343, pis. x. xi. 



The conclusions are: — 1, all the upper beds of the Jura may 

 present an oolitic or madreporic fades ; 2, all the oolitic beds yield in 

 their faunas analogous forms ; 3, all marly beds have similar relations ; 

 4, notwithstanding these resemblances each bed has particular species 

 which, either by their number, or even by their mere presence, indicate 

 the various horizons. The following new species are described : — 

 Pachyerisma TombecTci and P. Eoyeri, both from Corallian, Doulain- 

 court. G. A. L, 



