26 SCIENCE PROGRESS. 



WALTHEK, J. (i) Die Gesteinbidenden Kalkalgen des Golfes von 

 Neapel und die Entstehung structureloser Kalk. Zeitsch. 

 deutsch. Geol. Ges., vol. xxxvii., 18S5, p. 329. (2) Die Korall- 

 riffe der Sinaihalbinsel. Abh. math.-phys. CI. k. Sachs. Ges., vol 

 xiv., 18S8. 



WEED, W. H. The formation of travertine and siliceous sinter. 

 U. S. Geol. Surv. Ami. Rep., ix., 1887-88. 



WETHERED, E. (i) On the microscopic structure of the Jurassic 

 Pisolite. Geol. Mag., Dec. iii., vol. vi., 1889, p. 196. (2) On 

 the occurrence of the genus Girvanella in Oolitic rocks, and 

 remarks on Oolitic structure. Quart. Jour. Geol. Soc, vol. xlvi.,. 

 1890, p. 270. (3) The Inferior Oolite of the Cotteswold 

 Hills, with special reference to its microscopical structure. 

 Quart. Jour. Geol. Soc., vol. xlvii., 1891, p. 550. (4) On the 

 microscopic structure and residues insoluble in hydrochloric 

 acid in the Devonian limestones of South Devon. Quarts 

 Jour. Geol. Soc, vol. xlviii., 1892, p. 377. (5) On the micro- 

 scopical structure of the Wenlock limestone. Quart. Jour* 

 Geol. Soc, vol. xlix., 1893, p. 236. 



A. C. Seward. 



